【摘要】 以过硫酸铵为引发剂,接枝聚合制成木薯淀粉-醋酸乙烯酯(VAc)接枝共聚物。将该共聚物增塑、交联处理,制备可生物降解材料;研究了此材料的力学性能、热性能及生物降解性能等。结果表明,木薯淀粉-VAc接枝共聚降解材料的拉伸强度、撕裂强度及断裂伸长率分别为23.29 MPa、89.48 kN/m及225%,实验室微生物及土埋方式能快速地促进材料降解,材料60 d内的最大失重率为55.68%。更多还原

【Abstract】 With ammonium persulfate as initiator,andvinylacetate(VAc)-g-cassava starch copolymer was synthesized by means of graft copolymerization.Biological degradable materials were prepared by means of plasticizing and crosslinking of the copolymer.The mechanical properties,thermal property and biodegradability of the biological degradable materials were studied.The results showed the tensile strength,tear strength and elongation at break of the biological degradable materials were 23.29MPa、89.48 KN/m and 225%respectively.A-amylase had excellent degrading effect on the grafted copolymer,bacillus and burying with clay could also speed up the degradation of the copolymer.The greatest weight loss rate of the copolymer was 55.68%after 60 days degradating.更多还原