Properties of crosslinked polylactides (PLLA & PDLA) by radiation and its biodegradability
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- 作者：Tran Minh Quynh ; Hiroshi Mitomo ; Naogutsu Nagasawa ; Yuki Wada ; Fumio Yoshii ; Masao Tamada
- 关键词：Poly(lactide) ; Radiation crosslinked ; Mechanical property ; Biodegradability
- 刊名：European Polymer Journal
- 出版年：2007
- 出版时间：May 2007
- 年：2007
- 卷：43
- 期：5
- 页码：1779-1785
- 全文大小：478 K
文摘
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 °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.