Properties of crosslinked polylactides (PLLA & PDLA) by radiation and its biodegradability

被引：130
作者：
Quynh, Tran Minh
Mitomo, Hiroshi
Nagasawa, Naogutsu
Wada, Yuki
Yoshii, Fumio
Tamada, Masao
机构：
[1] Gunma Univ, Fac Engn, Dept Biol & Chem Engn, Kiryu, Gunma 3768515, Japan
[2] Japan Atom Energy Res Inst, Takasaki Adv Radiat Res Inst, Takasaki, Gunma 3701292, Japan
来源：
EUROPEAN POLYMER JOURNAL | 2007年 / 43卷 / 05期
关键词：
poly(lactide); radiation crosslinked; mechanical property; biodegradability;
D O I：
10.1016/j.eurpolymj.2007.03.007
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Crosslinked materials derived from poly(lactide) (PLA) have been produced by radiation modification in the presence of a suitable crosslinker (triallyl isocyanurate) (TAIC). The crosslinking structure introduced in PLA films has not only much improved the heat stability but also their mechanical properties. The properties of crosslinked samples are governed by crosslinking density and these improvement seemed to increase with radiation dose. This implied that the three dimensional networks have been introduced in material by radiation and the crosslinking density depended on the structure and length of PLA chains. Biodegradability of PLA was also determined by an enzymatic degradation test and burying in compost at 55 degrees C. Differing with PLLA, PDLA was insignificantly degraded by proteinase K. The degradation rate of PLA in compost was postponed with the introduction of crosslinks. (C) 2007 Elsevier Ltd. All rights reserved.
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页码：1779 / 1785
页数：7
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