高填充可降解淀粉基聚烯烃材料的制备及其堆肥降解  

Preparation and Composting Degradation Behavior of Highly Filled Starch Based Polyolefin Composites

作　　者：周旭[1] 刘艺舟[1] 张守一[1] 张桂新[1] 汪济奎[1] 

机构地区：[1]华东理工大学材料科学与工程学院高分子合金研究室上海市先进聚合物材料重点实验室超细材料制备与应用教育部重点实验室,上海200237

出　　处：《功能高分子学报》2011年第4期427-431,共5页Journal of Functional Polymers

基　　金：国家科技支撑计划(2012BAD32B01)(2008BAC46B10);西南科技大学生物质材料教育部工程研究中心开放基金

摘　　要：制备了高填充的聚乙烯(PE)-淀粉-碳酸钙(CaCO3)三元复合材料,根据ASTM D6400标准对该材料进行了堆肥降解。采用熔体流动速率(MFI)、差示扫描量热分析(DSC)、扫描电镜分析(SEM)等方法研究了该复合材料的堆肥降解行为。结果表明:堆肥降解过程中,熔体流动速率(MFI)在堆肥1个月左右出现极小值;降解过程中聚合物的结晶度下降、形态变化显著;随着堆肥时间的延长,淀粉相含量不断降低;降解3个月后断裂伸长率、冲击强度及弯曲强度分别下降了28.0%、24.5%及25.5%,但降解对材料的拉伸强度影响较小。Highly filled polyethylene-starch-calcium carbonate ternary composite was prepared and compost degraded according to ASTM D6400 standard.The degradation behavior of the composite was studied by melt flow indexes（MFI）,differential scanning calorimetry（DSC）,scanning electron microscopy（SEM） and so on.Results showed that the MFI reached a minimum value around the first month of compost,the crystallinity of the composite decreased,the morphology of the composite changed significantly and the starch content decreased continuously with the extension of compost time.After composted for 3 months,the elongation at break,impact strength and flexural strength were decreased by 28.0%,24.5% and 25.5%,respectively.But the tensile strength changed little with the extension of compost time.

关 键 词：淀粉 聚乙烯 堆肥 降解 

分 类 号：O631[理学—高分子化学]