Silane modified starch for compatible reactive blend with poly(lactic acid)

被引：80

作者：

Jariyasakoolroj, Piyawanee ^{[1
]}

Chirachanchai, Suwabun ^{[1
,2
]}

机构：

[1] Chulalongkorn Univ, Petr & Petrochem Coll, Bangkok 10330, Thailand

[2] Chulalongkorn Univ, Ctr Petr Petrochem & Adv Mat, Bangkok 10330, Thailand

来源：

CARBOHYDRATE POLYMERS | 2014年 / 106卷

关键词：

Poly(lactic acid); Starch; Compatibility; Silane coupling agent; Reactive blend; CRYSTALLIZATION BEHAVIOR; MECHANICAL-PROPERTIES; POLY(L-LACTIC ACID); ACID)/STARCH BLENDS; THERMAL-PROPERTIES; RAPID PREPARATION; NUCLEATING-AGENT; MORPHOLOGY; COMPOSITES; PLASTICIZATION;

D O I：

10.1016/j.carbpol.2014.02.018

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A reactive blend of poly(lactic acid) (PLA) and a surface modified starch by silane coupling agent to achieve compatibility is proposed. A detailed structural analysis by using H-1-H-1 TOCSY NMR spectrum clarifies, for the first time, that chloropropyl trimethoxysilane (CPMS) forms covalent bonds with starch during starch modification and consequently forms covalent bonds with PLA in the step of blending to produce a reactive blend of PLA and CP-starch. The CP-starch covalently bound with PLA provides the compatibility between PLA and starch and also plays the role as nucleating agent as identified from a significant increase of degree of crystallinity (as high as 10-15 times), as well as induces chain mobility, as identified from a slight decrease in glass transition temperature (similar to 5-10 degrees C). The PLA/CP-starch film performed as well as neat PLA with slight increases in tensile strength and elongation at break, as compared to other PLA/silane modified starch films. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：255 / 263

页数：9

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