Starch polyvinyl alcohol crosslinked film - Performance and biodegradation

被引:98
作者
Chen, L [1 ]
Imam, SH [1 ]
Gordon, SH [1 ]
Greene, RV [1 ]
机构
[1] USDA ARS,NATL CTR AGR UTILIZAT RES,BIOPOLYMER RES UNIT,PEORIA,IL 61604
来源
JOURNAL OF ENVIRONMENTAL POLYMER DEGRADATION | 1997年 / 5卷 / 02期
关键词
starch; polyvinyl alcohol; film; crosslinking; hexamethoxymethylmelamine; biodegradation; respirometer; water resistance;
D O I
10.1007/BF02763594
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Starch-PVOH cast films were prepared with and without crosslinking agent (hexamethoxymethylmelamine) in the absence of plasticizer. Moisture absorption in films without crosslinking agent at a low relative humidity was similar to that of PVOH and increased as the relative humidity increased. Films with crosslinking agent showed moisture absorption linearly proportional to the relative humidity. Significant improvement in resistance to water disintegration for crosslinked starch-PVOH films was observed. While the tensile strength decreased with increased relative humidity, crosslinking significantly improved the tensile strength. Increased PVOH content improved elongation of films even when the relative humidity was 80% or higher. Biodegradation studies revealed that the degradation rate was negatively correlated with the PVOH content in films and crosslinking generated more converged degradation curves.
引用
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页码:111 / 117
页数:7
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