聚乳酸固相接枝马来酸酐及与淀粉共混研究  

Study on Solid-phase Grafting MAH onto Poly(lactic acid) and its Blending with Starch

作　　者：方显力[1] 项尚林[1] 缪健[1] 陈贤益[1] 

机构地区：[1]南京工业大学,南京210009

出　　处：《包装工程》2007年第11期31-33,37,共4页Packaging Engineering

摘　　要：通过固相接枝的方法，合成了聚乳酸与马来酸酐的接枝共聚物PLA—g—MAH，以改善其与淀粉共混物的相容性。研究了不同的接枝工艺条件对共聚物接枝率的影响，并考察了接枝聚乳酸与淀粉熔融共混物的力学性能和热性能。结果表明，在惰性气体环境中，聚乳酸可以和马来酸酐通过过氧化物引发而发生固相接枝反应。固定PLAl00份，MAH5份（质量比）不变，较好的工艺条件是引发剂用量为0、6份，120℃温度下反应1．4～1、6h。接枝聚乳酸与淀粉熔融共混，改善了聚乳酸和淀粉的相容性，提高了共混物的力学性能。A solid-phase grafting technology for maleic anhydride （MAH） onto Poly （lactic acid） （ PLA ） was studied, and the effect of different factors on the grafting degree was investigated, The properties of a PLA and Starch composite （ PLA/Starch ） and a MAH grafted PLA and Starch composite （ PLA - g - MAH/Starch） were also compared. The results showed that the solid-phase grafting reaction of MAH onto PLA can take place in inert gas atmospheres. When the mass ratio of PLA to MAH is fixed at 100：5, the proper technological condition is at 120℃ for 1.4 - 1.6h in the presence of 0.6 part benzoyl peroxide（BPO） as initiator. The melt co-blended composite of PLA - g - MAH/Starch shows better compatibility between the two phases and mechanical properties were improved compared to PLA and starch composite（PLA/Starch）.

关 键 词：聚乳酸 固相接枝 淀粉 相容性 

分 类 号：TQ432.2[化学工程]