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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis, characterization, and in vitro degradation of star-shaped P(epsilon-caprolactone)-b-poly(L-lactide)-b-poly(D,L-lactide-co-glycolide) from hexakis [p-(hydroxymethyl)phenoxy]cyclotriphosphazene initiator
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Synthesis, characterization, and in vitro degradation of star-shaped P(epsilon-caprolactone)-b-poly(L-lactide)-b-poly(D,L-lactide-co-glycolide) from hexakis [p-(hydroxymethyl)phenoxy]cyclotriphosphazene initiator

机译：从六[[-（羟甲基）]合成星形P（ε-己内酯）-b-聚（L-丙交酯）-b-聚（D，L-丙交酯-乙交酯）的合成，表征和体外降解苯氧基]环三磷腈引发剂

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摘要

Hexaarmed star-shaped hydroxyl-terminated poly(epsilon-caprolactone) (PCL) was successfully synthesized via the ring-opening polymerization of E-caprolactone (CL) with hexakis[p-(hydroxymethyl)phenoxy]cyclotriphosphazene initiator and stannous octoate catalyst in bulk. The star-shaped PCL with hydroxy end groups could be used as a macroinitiator for block copolymerization with L-lactide (L-LA). The star-shaped triblock copolymer was synthesized by above-mentioned hydroxyl-terminated star-shaped diblock PCL-b-PLLA, D,L-lactide (D,L-LA), and glycolide (GA). IR, H-1 NMR, and GPC analysis showed that the star-shaped block copolymers were successfully synthesized and the molecular weights and the unit composition of the star-shaped block copolymers were controlled by the molar ratios of monomer to initiator. The triblock copolymer presented a three-phase structure, namely, PCL crystalline, PLLA crystalline, and D,L-PLAGA amorphous domains, which made the triblock copolymer different from the diblock copolymer and star-shaped PCL in crystallizability and thermal behaviors. Then, the in vitro degradation behaviors of the copolymers were investigated. (c) 2007 Wiley Periodicals, Inc.
机译：通过己-内酯（CL）与六[对-（羟甲基）苯氧基]环三磷腈引发剂和辛酸亚锡催化剂的开环聚合，成功合成了六臂星形羟基封端的聚ε-己内酯（PCL） 。具有羟基端基的星形PCL可用作与L-丙交酯（L-LA）嵌段共聚的大分子引发剂。通过上述羟基封端的星形二嵌段PCL-b-PLLA，D，L-丙交酯（D，L-LA）和乙交酯（GA）合成星形三嵌段共聚物。 IR，H-1 NMR和GPC分析表明，成功地合成了星形嵌段共聚物，并且通过单体与引发剂的摩尔比控制了星形嵌段共聚物的分子量和单元组成。三嵌段共聚物呈现三相结构，即PCL晶体，PLLA晶体和D，L-PLAGA非晶域，这使得三嵌段共聚物在可结晶性和热行为方面不同于二嵌段共聚物和星形PCL。然后，研究了共聚物的体外降解行为。 （c）2007年Wiley Periodicals，Inc.

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