AustralieFrV1, PascalFrancis, Curation, bibRecord, 003427

Synthesis of Four-Arm Star Poly(L-Lactide) Oligomers Using an In Situ-Generated Calcium-Based Initiator

Identifieur interne : 003427 ( PascalFrancis/Curation ); précédent : 003426; suivant : 003428

Synthesis of Four-Arm Star Poly(L-Lactide) Oligomers Using an In Situ-Generated Calcium-Based Initiator

Auteurs : Karina A. George [Australie] ; François Schue [France] ; Traian V. Chirlla [Australie] ; Edeline Wentrup-Byrne [Australie]

Source :

Journal of polymer science. Part A. Polymer chemistry [ 0887-624X ] ; 2009.

RBID : Pascal:09-0384125

Descripteurs français

Pascal (Inist)
- Lactique acide polymère, Polymère étoile, Polymère optiquement actif, Oligomère, Polymère vivant, Préparation, Polymérisation ouverture cycle, Polymérisation masse, Polymérisation phase hétérogène, Alcoolate, Composé du calcium, Activité amorceur, Etude expérimentale, Etoile 4 branches.

English descriptors

KwdEn :
- Alkoxide, Bulk polymerization, Calcium compound, Experimental study, Heterogeneous polymerization, Lactic acid polymer, Living polymer, Oligomer, Optically active polymer, Preparation, Priming activity, Ring opening polymerization, Star polymer.

Abstract

Using an in situ-generated calcium-based initiating species derived from pentaerythritol, the bulk synthesis of well-defined four-arm star poly(L-lactide) oligomers has been studied in detail. The substitution of the traditional initiator, stannous octoate with calcium hydride allowed the synthesis of oligomers that had both low PDIs and a comparable number of polymeric arms (3.7-3.9) to oligomers of similar molecular weight. Investigations into the degree of control observed during the course of the polymerization found that the insolubility of pentaerythritol in molten L-lactide resulted in an uncontrolled polymerization only when the feed mole ratio of L-lactide to pentaerythritol was 13. At feed ratios of 40 and greater, a pseudoliving polymerization was observed. As part of this study, in situ FT-Raman spectroscopy was demonstrated to be a suitable method to monitor the kinetics of the ring-opening polymerization of lactide. The advantages of using this technique rather than FTIR-ATR and ¹H NMR for monitoring _L-lactide consumption during polymerization are discussed.

A01	`01`	`1`		`@0 0887-624X`
A02	`01`			`@0 JPLCAT`
A03		`1`		`@0 J. polym. sci., Part A, Polym. chem.`
A05				`@2 47`
A06				`@2 18`
A08	`01`	`1`	`ENG`	`@1 Synthesis of Four-Arm Star Poly(_L-Lactide) Oligomers Using an In Situ-Generated Calcium-Based Initiator`
A11	`01`	`1`		`@1 GEORGE (Karina A.)`
A11	`02`	`1`		`@1 SCHUE (François)`
A11	`03`	`1`		`@1 CHIRLLA (Traian V.)`
A11	`04`	`1`		`@1 WENTRUP-BYRNE (Edeline)`
A14	`01`			`@1 School of Physical and Chemical Sciences, Queensland University of Technology, 2 George St @2 Brisbane, Queensland 4001 @3 AUS @Z 1 aut. @Z 3 aut. @Z 4 aut.`
A14	`02`			`@1 Organisation Moleculaire Evolution et Materiaux Fluores, UMR CNRS 5073 Université Montpellier 2 @3 FRA @Z 2 aut.`
A14	`03`			`@1 Queensland Eye Institute, 41 Annerley Road @2 South Brisbane, Queensland 4101 @3 AUS @Z 3 aut.`
A14	`04`			`@1 Australian Institute for Bioengineering and Nanotechnology (AIBN), University of Queensland, St. Lucia @2 Brisbane, Queensland 4072 @3 AUS @Z 3 aut.`
A14	`05`			`@1 Tissue Repair and Regeneration Research Program, Institute for Health and Biomedical Innovation (IHBI), Queensland University of Technology, 2 George St @2 Brisbane, Queensland 4001 @3 AUS @Z 4 aut.`
A20				`@1 4736-4748`
A21				`@1 2009`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 6199A1 @5 354000187633500220`
A44				`@0 0000 @1 © 2009 INIST-CNRS. All rights reserved.`
A45				`@0 80 ref.`
A47	`01`	`1`		`@0 09-0384125`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Journal of polymer science. Part A. Polymer chemistry`
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C01	`01`		`ENG`	@0 Using an in situ-generated calcium-based initiating species derived from pentaerythritol, the bulk synthesis of well-defined four-arm star poly(L-lactide) oligomers has been studied in detail. The substitution of the traditional initiator, stannous octoate with calcium hydride allowed the synthesis of oligomers that had both low PDIs and a comparable number of polymeric arms (3.7-3.9) to oligomers of similar molecular weight. Investigations into the degree of control observed during the course of the polymerization found that the insolubility of pentaerythritol in molten L-lactide resulted in an uncontrolled polymerization only when the feed mole ratio of L-lactide to pentaerythritol was 13. At feed ratios of 40 and greater, a pseudoliving polymerization was observed. As part of this study, in situ FT-Raman spectroscopy was demonstrated to be a suitable method to monitor the kinetics of the ring-opening polymerization of lactide. The advantages of using this technique rather than FTIR-ATR and ¹H NMR for monitoring _L-lactide consumption during polymerization are discussed.
C02	`01`	`X`		`@0 001D09D02B`
C03	`01`	`X`	`FRE`	`@0 Lactique acide polymère @2 NK @5 02`
C03	`01`	`X`	`ENG`	`@0 Lactic acid polymer @2 NK @5 02`
C03	`01`	`X`	`SPA`	`@0 Láctico ácido polímero @2 NK @5 02`
C03	`02`	`X`	`FRE`	`@0 Polymère étoile @5 03`
C03	`02`	`X`	`ENG`	`@0 Star polymer @5 03`
C03	`02`	`X`	`SPA`	`@0 Polímero estrella @5 03`
C03	`03`	`X`	`FRE`	`@0 Polymère optiquement actif @5 04`
C03	`03`	`X`	`ENG`	`@0 Optically active polymer @5 04`
C03	`03`	`X`	`SPA`	`@0 Polímero ópticamente activo @5 04`
C03	`04`	`X`	`FRE`	`@0 Oligomère @5 05`
C03	`04`	`X`	`ENG`	`@0 Oligomer @5 05`
C03	`04`	`X`	`SPA`	`@0 Oligómero @5 05`
C03	`05`	`X`	`FRE`	`@0 Polymère vivant @5 06`
C03	`05`	`X`	`ENG`	`@0 Living polymer @5 06`
C03	`05`	`X`	`SPA`	`@0 Polímero viviente @5 06`
C03	`06`	`X`	`FRE`	`@0 Préparation @5 07`
C03	`06`	`X`	`ENG`	`@0 Preparation @5 07`
C03	`06`	`X`	`SPA`	`@0 Preparación @5 07`
C03	`07`	`X`	`FRE`	`@0 Polymérisation ouverture cycle @5 08`
C03	`07`	`X`	`ENG`	`@0 Ring opening polymerization @5 08`
C03	`07`	`X`	`SPA`	`@0 Polimerización abertura ciclo @5 08`
C03	`08`	`X`	`FRE`	`@0 Polymérisation masse @5 09`
C03	`08`	`X`	`ENG`	`@0 Bulk polymerization @5 09`
C03	`08`	`X`	`SPA`	`@0 Polimerización masa @5 09`
C03	`09`	`X`	`FRE`	`@0 Polymérisation phase hétérogène @5 10`
C03	`09`	`X`	`ENG`	`@0 Heterogeneous polymerization @5 10`
C03	`09`	`X`	`SPA`	`@0 Polimerización fase heterogénea @5 10`
C03	`10`	`X`	`FRE`	`@0 Alcoolate @5 12`
C03	`10`	`X`	`ENG`	`@0 Alkoxide @5 12`
C03	`10`	`X`	`SPA`	`@0 Alcoholato @5 12`
C03	`11`	`X`	`FRE`	`@0 Composé du calcium @5 13`
C03	`11`	`X`	`ENG`	`@0 Calcium compound @5 13`
C03	`11`	`X`	`SPA`	`@0 Calcio compuesto @5 13`
C03	`12`	`X`	`FRE`	`@0 Activité amorceur @5 15`
C03	`12`	`X`	`ENG`	`@0 Priming activity @5 15`
C03	`12`	`X`	`SPA`	`@0 Actividad trampa @5 15`
C03	`13`	`X`	`FRE`	`@0 Etude expérimentale @5 16`
C03	`13`	`X`	`ENG`	`@0 Experimental study @5 16`
C03	`13`	`X`	`SPA`	`@0 Estudio experimental @5 16`
C03	`14`	`X`	`FRE`	`@0 Etoile 4 branches @4 INC @5 32`
C07	`01`	`X`	`FRE`	`@0 Lactone polymère @2 NK @5 01`
C07	`01`	`X`	`ENG`	`@0 Lactone polymer @2 NK @5 01`
C07	`01`	`X`	`SPA`	`@0 Lactona polímero @2 NK @5 01`
N21				`@1 278`
N44	`01`			`@1 PSI`
N82				`@1 PSI`

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Le document en format XML

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<term>Oligomer</term>
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<front><div type="abstract" xml:lang="en">Using an in situ-generated calcium-based initiating species derived from pentaerythritol, the bulk synthesis of well-defined four-arm star poly(L-lactide) oligomers has been studied in detail. The substitution of the traditional initiator, stannous octoate with calcium hydride allowed the synthesis of oligomers that had both low PDIs and a comparable number of polymeric arms (3.7-3.9) to oligomers of similar molecular weight. Investigations into the degree of control observed during the course of the polymerization found that the insolubility of pentaerythritol in molten L-lactide resulted in an uncontrolled polymerization only when the feed mole ratio of L-lactide to pentaerythritol was 13. At feed ratios of 40 and greater, a pseudoliving polymerization was observed. As part of this study, in situ FT-Raman spectroscopy was demonstrated to be a suitable method to monitor the kinetics of the ring-opening polymerization of lactide. The advantages of using this technique rather than FTIR-ATR and <sup>1</sup>
H NMR for monitoring <sub>L</sub>
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<fC01 i1="01" l="ENG"><s0>Using an in situ-generated calcium-based initiating species derived from pentaerythritol, the bulk synthesis of well-defined four-arm star poly(L-lactide) oligomers has been studied in detail. The substitution of the traditional initiator, stannous octoate with calcium hydride allowed the synthesis of oligomers that had both low PDIs and a comparable number of polymeric arms (3.7-3.9) to oligomers of similar molecular weight. Investigations into the degree of control observed during the course of the polymerization found that the insolubility of pentaerythritol in molten L-lactide resulted in an uncontrolled polymerization only when the feed mole ratio of L-lactide to pentaerythritol was 13. At feed ratios of 40 and greater, a pseudoliving polymerization was observed. As part of this study, in situ FT-Raman spectroscopy was demonstrated to be a suitable method to monitor the kinetics of the ring-opening polymerization of lactide. The advantages of using this technique rather than FTIR-ATR and <sup>1</sup>
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-lactide consumption during polymerization are discussed.</s0>
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<s2>NK</s2>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Lactic acid polymer</s0>
<s2>NK</s2>
<s5>02</s5>
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<fC03 i1="01" i2="X" l="SPA"><s0>Láctico ácido polímero</s0>
<s2>NK</s2>
<s5>02</s5>
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<fC03 i1="02" i2="X" l="FRE"><s0>Polymère étoile</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Star polymer</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Polímero estrella</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Polymère optiquement actif</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Optically active polymer</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Polímero ópticamente activo</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Oligomère</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Oligomer</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Oligómero</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Polymère vivant</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Living polymer</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Polímero viviente</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Préparation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Preparation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Preparación</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Polymérisation ouverture cycle</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Ring opening polymerization</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Polimerización abertura ciclo</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Polymérisation masse</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Bulk polymerization</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Polimerización masa</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Polymérisation phase hétérogène</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Heterogeneous polymerization</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Polimerización fase heterogénea</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Alcoolate</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Alkoxide</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Alcoholato</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Composé du calcium</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Calcium compound</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Calcio compuesto</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Activité amorceur</s0>
<s5>15</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Priming activity</s0>
<s5>15</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Actividad trampa</s0>
<s5>15</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Etude expérimentale</s0>
<s5>16</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Experimental study</s0>
<s5>16</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Estudio experimental</s0>
<s5>16</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Etoile 4 branches</s0>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Lactone polymère</s0>
<s2>NK</s2>
<s5>01</s5>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Lactone polymer</s0>
<s2>NK</s2>
<s5>01</s5>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Lactona polímero</s0>
<s2>NK</s2>
<s5>01</s5>
</fC07>
<fN21><s1>278</s1>
</fN21>
<fN44 i1="01"><s1>PSI</s1>
</fN44>
<fN82><s1>PSI</s1>
</fN82>
</pA>
</standard>
</inist>
</record>

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   |area=    AustralieFrV1
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   |texte=   Synthesis of Four-Arm Star Poly(L-Lactide) Oligomers Using an In Situ-Generated Calcium-Based Initiator
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	Serveur d'exploration sur les relations entre la France et l'Australie
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Synthesis of Four-Arm Star Poly(L-Lactide) Oligomers Using an In Situ-Generated Calcium-Based Initiator

Synthesis of Four-Arm Star Poly(L-Lactide) Oligomers Using an In Situ-Generated Calcium-Based Initiator

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