Abstract:

Through testing of mechanical properties，and crystallization and SEM testing of different urea and glycerol co-plasticized TPS，the optimum weight ratio starch/urea/glycerol was 100/20/20. The tensile modulus of the TPS could reach 0.959 MPa，the elongation was up to 209%，recrystallization of urea did not occur，and the TPS had a good plasticization effect，in RH = 33% humidity environment preserved for one week.

摘要：

采用尿素、甘油为塑化剂制备热塑性淀粉材料，并对改性后淀粉的力学性能、塑化效果以及结晶状况进行了探索，考察了尿素与甘油不同比例对热塑性淀粉塑化效果的影响，得出热塑性淀粉最佳塑化质量比为淀粉/尿素/甘油为100/20/20。在RH为33%的湿度环境保存1周，上述比例塑化的热塑性淀粉拉伸模量可达0.959 MPa，断裂伸长率达209.64%，且热塑性淀粉内未出现尿素自结晶，淀粉塑化效果良好。