The effect of plasticizers on thermoplastic starch compositions obtained by melt processing

被引：208
|
作者：
Da Róz, AL
Carvalho, AJF
Gandini, A
Curvelo, AAS
机构：
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo, Brazil
[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Paulo, Brazil
来源：
CARBOHYDRATE POLYMERS | 2006年 / 63卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
thermoplastic starch; plasticizers; crystallinity; water affinity; thermal and mechanical properties;
D O I：
10.1016/j.carbpol.2005.09.017
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The effect of the type and amount of plasticizer on the mechanical, thermal and water-absorption properties of melt-processed thermoplastic starch was investigated. In general, monohydroxyl alcohols and high molecular weight glycols failed to plasticize starch, whereas shorter glycols and sorbitol were effective. The quantity and type of plasticizer did not affect appreciably the crystallinity of the processed samples, but influenced the mechanical properties of these TPS in two opposite ways, viz. a softening effect clue to the plasticizing of the amorphous phase and stiffening one due to an antiplasticization effect. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：417 / 424
页数：8
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