Miscibility, crystallinity and morphological behavior of binary blends of poly(ethylene oxide) and poly(methyl vinyl ether-maleic acid)

被引:79
作者
Rocco, AM
Pereira, RP
Felisberti, MI
机构
[1] Univ Fed Rio de Janeiro, Inst Quim, BR-22194990 Rio De Janeiro, Brazil
[2] Univ Estadual Campinas, Inst Quim, Sao Paulo, Brazil
关键词
blends; miscibility; PEO;
D O I
10.1016/S0032-3861(00)00784-9
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
DSC and optical microscopy were used to determine the miscibility and crystallinity of blends of poly(ethylene oxide) (PEO) with poly(methyl vinyl ether-co-maleic acid) (PMVE-MAc). Single T-g was observed for all blends, indicating miscibility. The dependence of T-g on the weight per cent of PEO presents a negative deviation from linearity at high PEO content, associated to a greater blend free volume, mobility and flexibility than in pure PEG. A progressive decrease in the degree of crystallinity and in the size of the PEO spherullites as the PMVE-MAc is added is observed. FTIR provided evidence of specific interaction between the polymers. (C) 2001 Elsevier Science Ltd. AU rights reserved.
引用
收藏
页码:5199 / 5205
页数:7
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