淀粉/聚乙烯醇共聚物包膜材料降解过程中粘均分子量的测定  

Measurement of Viscosity-average Molecular Weight of Copolymer Starch-PVA in Degradation

作　　者：于成广[1] 韩晓日[1] 付时丰[1] 王贺[1] 杨朝辉[1] 

机构地区：[1]沈阳农业大学土地与环境学院,沈阳110161

出　　处：《沈阳农业大学学报》2006年第1期53-56,共4页Journal of Shenyang Agricultural University

基　　金：国家"863"计划项目(2001AA246021);"十五"辽宁省重大攻关项目(2001208002)

摘　　要：高分子聚合物包膜材料降解过程就是主链上化学键的断裂并形成低相对分子质量碎片的过程,采用乌氏粘度计法测定淀粉/聚乙烯醇肥料包膜材料的降解程度。结果表明,膜材料降解40d后粘均分子量从61907降至54036,分子损失率为12.7%;对膜材分子损失率与失重率做相关性分析可知,相关性方程y=2.9144x-0.1471,相关系数R=0.9961>0.990,膜材的分子损失率与膜材的失重率呈极显著相关。Degradation behavior of macromolecule polymer coated material is the process that the rupture of chemical bond of main chain and forming molecular fractionlet. Ubbelohde viscosity method was put forward for measuring viscosity-average molecular weight of copolymer. The results showed that viscosity-average molecular weight of copolymer reduced from 61907 to 54036 after 40d of degzadation. Molecular loss ratio is 12.7%, The correlation equation is y=2.9144x-0,1471, R=0.9961〉0,990（correlation coefficient）. Coated material molecular loss ratio and molecular mass loss reach the obvious positive correlation.

关 键 词：淀粉/聚乙烯醇 乌氏粘度计法 粘均分子量 降解 

分 类 号：S145.5[农业科学—肥料学]