LrgpV1, PascalFrancis, Corpus, bibRecord, 000812

Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst. 2. Thermal properties

Identifieur interne : 000812 ( PascalFrancis/Corpus ); précédent : 000811; suivant : 000813

Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst. 2. Thermal properties

Auteurs : Vladimir A. Escobar Barrios ; Alain Petit ; Fernand Pla ; Rafael Herrera Najera

Source :

European polymer journal [ 0014-3057 ] ; 2003.

RBID : Pascal:03-0261831

Descripteurs français

Pascal (Inist)
- Styrène copolymère, Copolymère statistique, Copolymère biséquencé, Butadiène copolymère, SBS, Copolymère triséquencé, Modification chimique, Hydrogénation, Réaction catalytique, Catalyseur Ziegler Natta, Régiosélectivité, Butadiène dérivé copolymère, Copolymère insaturé, Cristallinité, Stabilité thermique, Relation composition structure, Etude expérimentale, Butadiène hydrogéné copolymère, SBS hydrogéné.

English descriptors

KwdEn :
- Butadiene copolymer, Butadiene derivative copolymer, Catalytic reaction, Chemical modification, Crystallinity, Diblock copolymer, Experimental study, Hydrogenation, Random copolymer, Regioselectivity, SBS, Structure composition relationship, Styrene copolymer, Thermal stability, Triblock copolymer, Unsaturated copolymer, Ziegler Natta catalyst.

Abstract

Three types of butadiene-styrene copolymers, diblock, triblock and random, were partially hydrogenated in their elastomeric units in order to determine the influence of hydrogenation extent on their thermal properties. The hydrogenation reactions were carried out using a Ziegler-Natta type catalyst and the extent of hydrogenation was evaluated by FTIR spectroscopic technique. The percentage of crystallinity was determined by differential scanning calorimetry (DSC), considering the low density polyethylene (LDPE) as reference since the saturation of elastomeric units with low content of 1, 2-vinyl bonds gives a structure which resembles to LDPE, thus semi-crystalline polymers were obtained. On the other hand, the glass transition temperature (T_g) for the hydrogenated and non-hydrogenated copolymers as well as their heat of fusion, were also determined by DSC. An equation to evaluate the T_g of partially hydrogenated random copolymers is proposed considering both the saturated and unsaturated fractions. The thermo-oxidative behaviour of certain hydrogenated and non-hydrogenated copolymers was evaluated by thermogravimetric analyses (TGA). The results obtained by TGA suggest that a minimum saturation level is necessary in order to improve the thermo-oxidative resistance of the polymers.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 0014-3057`
A02	`01`			`@0 EUPJAG`
A03		`1`		`@0 Eur. polym. j.`
A05				`@2 39`
A06				`@2 6`
A08	`01`	`1`	`ENG`	`@1 Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst. 2. Thermal properties`
A11	`01`	`1`		`@1 ESCOBAR BARRIOS (Vladimir A.)`
A11	`02`	`1`		`@1 PETIT (Alain)`
A11	`03`	`1`		`@1 PLA (Fernand)`
A11	`04`	`1`		`@1 HERRERA NAJERA (Rafael)`
A14	`01`			`@1 Centro de Investigación y Desarrollo, Dynasol Elostómeros S.A. de C. V., Carretera Tampico-Mante Km 28.5 @2 89600 Altamira, Tamaulipas @3 MEX @Z 1 aut.`
A14	`02`			`@1 Laboratoire de Chimie-Physique Macromoléculaire, CNRS UMR 7568, ENSIC-INPL, I, rue Grandville, BP 451 @2 54001 Nancy @3 FRA @Z 2 aut.`
A14	`03`			`@1 Laboratoire des Sciences du Génie Chimique, CNRS UPR 6811, ENSIC-INPL, I, rue Grandville, BP 451 @2 54001 Nancy @3 FRA @Z 3 aut.`
A14	`04`			`@1 Departamento de Polímeros, Edif. E, Facultadde Química, UNAM @2 D.F., 04510 @3 MEX @Z 4 aut.`
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A21				`@1 2003`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 12672 @5 354000118041020090`
A44				`@0 0000 @1 © 2003 INIST-CNRS. All rights reserved.`
A45				`@0 21 ref.`
A47	`01`	`1`		`@0 03-0261831`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 European polymer journal`
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C01	`01`		`ENG`	@0 Three types of butadiene-styrene copolymers, diblock, triblock and random, were partially hydrogenated in their elastomeric units in order to determine the influence of hydrogenation extent on their thermal properties. The hydrogenation reactions were carried out using a Ziegler-Natta type catalyst and the extent of hydrogenation was evaluated by FTIR spectroscopic technique. The percentage of crystallinity was determined by differential scanning calorimetry (DSC), considering the low density polyethylene (LDPE) as reference since the saturation of elastomeric units with low content of 1, 2-vinyl bonds gives a structure which resembles to LDPE, thus semi-crystalline polymers were obtained. On the other hand, the glass transition temperature (T_g) for the hydrogenated and non-hydrogenated copolymers as well as their heat of fusion, were also determined by DSC. An equation to evaluate the T_g of partially hydrogenated random copolymers is proposed considering both the saturated and unsaturated fractions. The thermo-oxidative behaviour of certain hydrogenated and non-hydrogenated copolymers was evaluated by thermogravimetric analyses (TGA). The results obtained by TGA suggest that a minimum saturation level is necessary in order to improve the thermo-oxidative resistance of the polymers.
C02	`01`	`X`		`@0 001D09D03A`
C03	`01`	`X`	`FRE`	`@0 Styrène copolymère @2 NK @5 01`
C03	`01`	`X`	`ENG`	`@0 Styrene copolymer @2 NK @5 01`
C03	`01`	`X`	`SPA`	`@0 Estireno copolímero @2 NK @5 01`
C03	`02`	`X`	`FRE`	`@0 Copolymère statistique @2 NK @5 02`
C03	`02`	`X`	`ENG`	`@0 Random copolymer @2 NK @5 02`
C03	`02`	`X`	`SPA`	`@0 Copolímero estadístico @2 NK @5 02`
C03	`03`	`X`	`FRE`	`@0 Copolymère biséquencé @2 NK @5 03`
C03	`03`	`X`	`ENG`	`@0 Diblock copolymer @2 NK @5 03`
C03	`03`	`X`	`SPA`	`@0 Copolímero bisecuencia @2 NK @5 03`
C03	`04`	`X`	`FRE`	`@0 Butadiène copolymère @1 ENT @2 NK @5 04`
C03	`04`	`X`	`ENG`	`@0 Butadiene copolymer @1 ENT @2 NK @5 04`
C03	`04`	`X`	`SPA`	`@0 Butadieno copolímero @1 ENT @2 NK @5 04`
C03	`05`	`X`	`FRE`	`@0 SBS @1 ENT @2 NK @5 05`
C03	`05`	`X`	`ENG`	`@0 SBS @1 ENT @2 NK @5 05`
C03	`05`	`X`	`SPA`	`@0 SBS @1 ENT @2 NK @5 05`
C03	`06`	`X`	`FRE`	`@0 Copolymère triséquencé @2 NK @5 06`
C03	`06`	`X`	`ENG`	`@0 Triblock copolymer @2 NK @5 06`
C03	`06`	`X`	`SPA`	`@0 Copolímero trisecuencia @2 NK @5 06`
C03	`07`	`X`	`FRE`	`@0 Modification chimique @5 08`
C03	`07`	`X`	`ENG`	`@0 Chemical modification @5 08`
C03	`07`	`X`	`SPA`	`@0 Modificación química @5 08`
C03	`08`	`X`	`FRE`	`@0 Hydrogénation @5 09`
C03	`08`	`X`	`ENG`	`@0 Hydrogenation @5 09`
C03	`08`	`X`	`SPA`	`@0 Hidrogenación @5 09`
C03	`09`	`X`	`FRE`	`@0 Réaction catalytique @5 11`
C03	`09`	`X`	`ENG`	`@0 Catalytic reaction @5 11`
C03	`09`	`X`	`SPA`	`@0 Reacción catalítica @5 11`
C03	`10`	`X`	`FRE`	`@0 Catalyseur Ziegler Natta @5 12`
C03	`10`	`X`	`ENG`	`@0 Ziegler Natta catalyst @5 12`
C03	`10`	`X`	`SPA`	`@0 Catalizador Ziegler Natta @5 12`
C03	`11`	`X`	`FRE`	`@0 Régiosélectivité @5 13`
C03	`11`	`X`	`ENG`	`@0 Regioselectivity @5 13`
C03	`11`	`X`	`SPA`	`@0 Regioselectividad @5 13`
C03	`12`	`X`	`FRE`	`@0 Butadiène dérivé copolymère @1 FIN @2 NK @5 14`
C03	`12`	`X`	`ENG`	`@0 Butadiene derivative copolymer @1 FIN @2 NK @5 14`
C03	`12`	`X`	`SPA`	`@0 Butadieno derivado copolímero @1 FIN @2 NK @5 14`
C03	`13`	`X`	`FRE`	`@0 Copolymère insaturé @2 NK @5 15`
C03	`13`	`X`	`ENG`	`@0 Unsaturated copolymer @2 NK @5 15`
C03	`13`	`X`	`SPA`	`@0 Copolímero insaturado @2 NK @5 15`
C03	`14`	`X`	`FRE`	`@0 Cristallinité @5 16`
C03	`14`	`X`	`ENG`	`@0 Crystallinity @5 16`
C03	`14`	`X`	`SPA`	`@0 Cristalinidad @5 16`
C03	`15`	`X`	`FRE`	`@0 Stabilité thermique @5 18`
C03	`15`	`X`	`ENG`	`@0 Thermal stability @5 18`
C03	`15`	`X`	`SPA`	`@0 Estabilidad térmica @5 18`
C03	`16`	`X`	`FRE`	`@0 Relation composition structure @5 20`
C03	`16`	`X`	`ENG`	`@0 Structure composition relationship @5 20`
C03	`16`	`X`	`SPA`	`@0 Relación composición estructura @5 20`
C03	`17`	`X`	`FRE`	`@0 Etude expérimentale @5 21`
C03	`17`	`X`	`ENG`	`@0 Experimental study @5 21`
C03	`17`	`X`	`SPA`	`@0 Estudio experimental @5 21`
C03	`18`	`X`	`FRE`	`@0 Butadiène hydrogéné copolymère @2 NK @4 INC @5 32`
C03	`19`	`X`	`FRE`	`@0 SBS hydrogéné @1 FIN @2 NK @4 INC @5 33`
N21				`@1 167`
N82				`@1 PSI`

Format Inist (serveur)

NO :	PASCAL 03-0261831 INIST
ET :	Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst. 2. Thermal properties
AU :	ESCOBAR BARRIOS (Vladimir A.); PETIT (Alain); PLA (Fernand); HERRERA NAJERA (Rafael)
AF :	Centro de Investigación y Desarrollo, Dynasol Elostómeros S.A. de C. V., Carretera Tampico-Mante Km 28.5/89600 Altamira, Tamaulipas/Mexique (1 aut.); Laboratoire de Chimie-Physique Macromoléculaire, CNRS UMR 7568, ENSIC-INPL, I, rue Grandville, BP 451/54001 Nancy/France (2 aut.); Laboratoire des Sciences du Génie Chimique, CNRS UPR 6811, ENSIC-INPL, I, rue Grandville, BP 451/54001 Nancy/France (3 aut.); Departamento de Polímeros, Edif. E, Facultadde Química, UNAM/D.F., 04510/Mexique (4 aut.)
DT :	Publication en série; Niveau analytique
SO :	European polymer journal; ISSN 0014-3057; Coden EUPJAG; Royaume-Uni; Da. 2003; Vol. 39; No. 6; Pp. 1151-1167; Bibl. 21 ref.
LA :	Anglais
EA :	Three types of butadiene-styrene copolymers, diblock, triblock and random, were partially hydrogenated in their elastomeric units in order to determine the influence of hydrogenation extent on their thermal properties. The hydrogenation reactions were carried out using a Ziegler-Natta type catalyst and the extent of hydrogenation was evaluated by FTIR spectroscopic technique. The percentage of crystallinity was determined by differential scanning calorimetry (DSC), considering the low density polyethylene (LDPE) as reference since the saturation of elastomeric units with low content of 1, 2-vinyl bonds gives a structure which resembles to LDPE, thus semi-crystalline polymers were obtained. On the other hand, the glass transition temperature (T_g) for the hydrogenated and non-hydrogenated copolymers as well as their heat of fusion, were also determined by DSC. An equation to evaluate the T_g of partially hydrogenated random copolymers is proposed considering both the saturated and unsaturated fractions. The thermo-oxidative behaviour of certain hydrogenated and non-hydrogenated copolymers was evaluated by thermogravimetric analyses (TGA). The results obtained by TGA suggest that a minimum saturation level is necessary in order to improve the thermo-oxidative resistance of the polymers.
CC :	001D09D03A
FD :	Styrène copolymère; Copolymère statistique; Copolymère biséquencé; Butadiène copolymère; SBS; Copolymère triséquencé; Modification chimique; Hydrogénation; Réaction catalytique; Catalyseur Ziegler Natta; Régiosélectivité; Butadiène dérivé copolymère; Copolymère insaturé; Cristallinité; Stabilité thermique; Relation composition structure; Etude expérimentale; Butadiène hydrogéné copolymère; SBS hydrogéné
ED :	Styrene copolymer; Random copolymer; Diblock copolymer; Butadiene copolymer; SBS; Triblock copolymer; Chemical modification; Hydrogenation; Catalytic reaction; Ziegler Natta catalyst; Regioselectivity; Butadiene derivative copolymer; Unsaturated copolymer; Crystallinity; Thermal stability; Structure composition relationship; Experimental study
SD :	Estireno copolímero; Copolímero estadístico; Copolímero bisecuencia; Butadieno copolímero; SBS; Copolímero trisecuencia; Modificación química; Hidrogenación; Reacción catalítica; Catalizador Ziegler Natta; Regioselectividad; Butadieno derivado copolímero; Copolímero insaturado; Cristalinidad; Estabilidad térmica; Relación composición estructura; Estudio experimental
LO :	INIST-12672.354000118041020090
ID :	03-0261831

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Pascal:03-0261831

Le document en format XML

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<term>Structure composition relationship</term>
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<front><div type="abstract" xml:lang="en">Three types of butadiene-styrene copolymers, diblock, triblock and random, were partially hydrogenated in their elastomeric units in order to determine the influence of hydrogenation extent on their thermal properties. The hydrogenation reactions were carried out using a Ziegler-Natta type catalyst and the extent of hydrogenation was evaluated by FTIR spectroscopic technique. The percentage of crystallinity was determined by differential scanning calorimetry (DSC), considering the low density polyethylene (LDPE) as reference since the saturation of elastomeric units with low content of 1, 2-vinyl bonds gives a structure which resembles to LDPE, thus semi-crystalline polymers were obtained. On the other hand, the glass transition temperature (T<sub>g</sub>
) for the hydrogenated and non-hydrogenated copolymers as well as their heat of fusion, were also determined by DSC. An equation to evaluate the T<sub>g</sub>
 of partially hydrogenated random copolymers is proposed considering both the saturated and unsaturated fractions. The thermo-oxidative behaviour of certain hydrogenated and non-hydrogenated copolymers was evaluated by thermogravimetric analyses (TGA). The results obtained by TGA suggest that a minimum saturation level is necessary in order to improve the thermo-oxidative resistance of the polymers.</div>
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</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>European polymer journal</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>Three types of butadiene-styrene copolymers, diblock, triblock and random, were partially hydrogenated in their elastomeric units in order to determine the influence of hydrogenation extent on their thermal properties. The hydrogenation reactions were carried out using a Ziegler-Natta type catalyst and the extent of hydrogenation was evaluated by FTIR spectroscopic technique. The percentage of crystallinity was determined by differential scanning calorimetry (DSC), considering the low density polyethylene (LDPE) as reference since the saturation of elastomeric units with low content of 1, 2-vinyl bonds gives a structure which resembles to LDPE, thus semi-crystalline polymers were obtained. On the other hand, the glass transition temperature (T<sub>g</sub>
) for the hydrogenated and non-hydrogenated copolymers as well as their heat of fusion, were also determined by DSC. An equation to evaluate the T<sub>g</sub>
 of partially hydrogenated random copolymers is proposed considering both the saturated and unsaturated fractions. The thermo-oxidative behaviour of certain hydrogenated and non-hydrogenated copolymers was evaluated by thermogravimetric analyses (TGA). The results obtained by TGA suggest that a minimum saturation level is necessary in order to improve the thermo-oxidative resistance of the polymers.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001D09D03A</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Styrène copolymère</s0>
<s2>NK</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Styrene copolymer</s0>
<s2>NK</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Estireno copolímero</s0>
<s2>NK</s2>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Copolymère statistique</s0>
<s2>NK</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Random copolymer</s0>
<s2>NK</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Copolímero estadístico</s0>
<s2>NK</s2>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Copolymère biséquencé</s0>
<s2>NK</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Diblock copolymer</s0>
<s2>NK</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Copolímero bisecuencia</s0>
<s2>NK</s2>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Butadiène copolymère</s0>
<s1>ENT</s1>
<s2>NK</s2>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Butadiene copolymer</s0>
<s1>ENT</s1>
<s2>NK</s2>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Butadieno copolímero</s0>
<s1>ENT</s1>
<s2>NK</s2>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>SBS</s0>
<s1>ENT</s1>
<s2>NK</s2>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>SBS</s0>
<s1>ENT</s1>
<s2>NK</s2>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>SBS</s0>
<s1>ENT</s1>
<s2>NK</s2>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Copolymère triséquencé</s0>
<s2>NK</s2>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Triblock copolymer</s0>
<s2>NK</s2>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Copolímero trisecuencia</s0>
<s2>NK</s2>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Modification chimique</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Chemical modification</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Modificación química</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Hydrogénation</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Hydrogenation</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Hidrogenación</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Réaction catalytique</s0>
<s5>11</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Catalytic reaction</s0>
<s5>11</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Reacción catalítica</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Catalyseur Ziegler Natta</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Ziegler Natta catalyst</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Catalizador Ziegler Natta</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Régiosélectivité</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Regioselectivity</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Regioselectividad</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Butadiène dérivé copolymère</s0>
<s1>FIN</s1>
<s2>NK</s2>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Butadiene derivative copolymer</s0>
<s1>FIN</s1>
<s2>NK</s2>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Butadieno derivado copolímero</s0>
<s1>FIN</s1>
<s2>NK</s2>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Copolymère insaturé</s0>
<s2>NK</s2>
<s5>15</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Unsaturated copolymer</s0>
<s2>NK</s2>
<s5>15</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Copolímero insaturado</s0>
<s2>NK</s2>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Cristallinité</s0>
<s5>16</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Crystallinity</s0>
<s5>16</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Cristalinidad</s0>
<s5>16</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Stabilité thermique</s0>
<s5>18</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>Thermal stability</s0>
<s5>18</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>Estabilidad térmica</s0>
<s5>18</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>Relation composition structure</s0>
<s5>20</s5>
</fC03>
<fC03 i1="16" i2="X" l="ENG"><s0>Structure composition relationship</s0>
<s5>20</s5>
</fC03>
<fC03 i1="16" i2="X" l="SPA"><s0>Relación composición estructura</s0>
<s5>20</s5>
</fC03>
<fC03 i1="17" i2="X" l="FRE"><s0>Etude expérimentale</s0>
<s5>21</s5>
</fC03>
<fC03 i1="17" i2="X" l="ENG"><s0>Experimental study</s0>
<s5>21</s5>
</fC03>
<fC03 i1="17" i2="X" l="SPA"><s0>Estudio experimental</s0>
<s5>21</s5>
</fC03>
<fC03 i1="18" i2="X" l="FRE"><s0>Butadiène hydrogéné copolymère</s0>
<s2>NK</s2>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fC03 i1="19" i2="X" l="FRE"><s0>SBS hydrogéné</s0>
<s1>FIN</s1>
<s2>NK</s2>
<s4>INC</s4>
<s5>33</s5>
</fC03>
<fN21><s1>167</s1>
</fN21>
<fN82><s1>PSI</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 03-0261831 INIST</NO>
<ET>Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst. 2. Thermal properties</ET>
<AU>ESCOBAR BARRIOS (Vladimir A.); PETIT (Alain); PLA (Fernand); HERRERA NAJERA (Rafael)</AU>
<AF>Centro de Investigación y Desarrollo, Dynasol Elostómeros S.A. de C. V., Carretera Tampico-Mante Km 28.5/89600 Altamira, Tamaulipas/Mexique (1 aut.); Laboratoire de Chimie-Physique Macromoléculaire, CNRS UMR 7568, ENSIC-INPL, I, rue Grandville, BP 451/54001 Nancy/France (2 aut.); Laboratoire des Sciences du Génie Chimique, CNRS UPR 6811, ENSIC-INPL, I, rue Grandville, BP 451/54001 Nancy/France (3 aut.); Departamento de Polímeros, Edif. E, Facultadde Química, UNAM/D.F., 04510/Mexique (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>European polymer journal; ISSN 0014-3057; Coden EUPJAG; Royaume-Uni; Da. 2003; Vol. 39; No. 6; Pp. 1151-1167; Bibl. 21 ref.</SO>
<LA>Anglais</LA>
<EA>Three types of butadiene-styrene copolymers, diblock, triblock and random, were partially hydrogenated in their elastomeric units in order to determine the influence of hydrogenation extent on their thermal properties. The hydrogenation reactions were carried out using a Ziegler-Natta type catalyst and the extent of hydrogenation was evaluated by FTIR spectroscopic technique. The percentage of crystallinity was determined by differential scanning calorimetry (DSC), considering the low density polyethylene (LDPE) as reference since the saturation of elastomeric units with low content of 1, 2-vinyl bonds gives a structure which resembles to LDPE, thus semi-crystalline polymers were obtained. On the other hand, the glass transition temperature (T<sub>g</sub>
) for the hydrogenated and non-hydrogenated copolymers as well as their heat of fusion, were also determined by DSC. An equation to evaluate the T<sub>g</sub>
 of partially hydrogenated random copolymers is proposed considering both the saturated and unsaturated fractions. The thermo-oxidative behaviour of certain hydrogenated and non-hydrogenated copolymers was evaluated by thermogravimetric analyses (TGA). The results obtained by TGA suggest that a minimum saturation level is necessary in order to improve the thermo-oxidative resistance of the polymers.</EA>
<CC>001D09D03A</CC>
<FD>Styrène copolymère; Copolymère statistique; Copolymère biséquencé; Butadiène copolymère; SBS; Copolymère triséquencé; Modification chimique; Hydrogénation; Réaction catalytique; Catalyseur Ziegler Natta; Régiosélectivité; Butadiène dérivé copolymère; Copolymère insaturé; Cristallinité; Stabilité thermique; Relation composition structure; Etude expérimentale; Butadiène hydrogéné copolymère; SBS hydrogéné</FD>
<ED>Styrene copolymer; Random copolymer; Diblock copolymer; Butadiene copolymer; SBS; Triblock copolymer; Chemical modification; Hydrogenation; Catalytic reaction; Ziegler Natta catalyst; Regioselectivity; Butadiene derivative copolymer; Unsaturated copolymer; Crystallinity; Thermal stability; Structure composition relationship; Experimental study</ED>
<SD>Estireno copolímero; Copolímero estadístico; Copolímero bisecuencia; Butadieno copolímero; SBS; Copolímero trisecuencia; Modificación química; Hidrogenación; Reacción catalítica; Catalizador Ziegler Natta; Regioselectividad; Butadieno derivado copolímero; Copolímero insaturado; Cristalinidad; Estabilidad térmica; Relación composición estructura; Estudio experimental</SD>
<LO>INIST-12672.354000118041020090</LO>
<ID>03-0261831</ID>
</server>
</inist>
</record>

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Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst. 2. Thermal properties

Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst. 2. Thermal properties

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