Effects of molecular weights of poly(p-dioxanone) on its thermal, rheological and mechanical properties and in vitro degradability

Yang  KK; Wang  XL; Wang  YZHuang  HX

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Effects of molecular weights of poly(p-dioxanone) on its thermal, rheological and mechanical properties and in vitro degradability

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Poly(p-dioxanone) (PPDO) samples with different molecular weights have been synthesized by the ring-opening polymerization of p-dioxanone. The thermogravimetric analysis of PPDO shows that the increase of molecular weights can improve the thermal stability of PPDO. The rheological property of PPDO with different molecular weights has been investigated using a Capillary Rheometer. The results show that PPDO exhibits a shear-thinning behavior; the apparent viscosity of melt increases with the molecular weight of PPDO and is very sensitive to temperature, decreasing sharply with the rise of temperature. In vitro degradation of PPDO films has also been carried out and excellent degradability has been found. The mechanical test shows that the tensile strength and modulus of PPDO increase with molecular weights. (C) 2004 Elsevier B.V. All rights reserved.

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《Materials Chemistry and Physics》 |2004年第1期|218-221|共4页
作者
Yang KK; Wang XL; Wang YZHuang HX;
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作者单位

Sichuan Univ, Coll Chem, Ctr Degradable & Flame Retardant Polymer Mat, Chengdu 610064, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
poly(p-dioxanone); thermal stability; rheological property; hydrolysis; degradation; mechanical property; P-DIOXANONE; ABSORBABLE POLY(P-DIOXANONE); MICROBIAL-DEGRADATION; L-LACTIDE; CRYSTALLIZATION; DECOMPOSITION; COPOLYMERS; MORPHOLOGY; 1; 4-DIOXAN-2-ONE; MICROORGANISMS;

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Effects of molecular weights of poly(p-dioxanone) on its thermal, rheological and mechanical properties and in vitro degradability

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