碳酸钙高填充聚乳酸复合材料的制备及性能  

Preparation of Poly(lactic acid) Composite with High Calcium Carbonate Content and Its Properties

作　　者：袁华[1] 丁峰[1] 葛芳芳[1] 任杰[1,2] 

机构地区：[1]同济大学材料科学与工程学院,纳米与生物高分子材料研究所,上海201804 [2]同济大学先进土木工程材料教育部重点实验室,上海201804

出　　处：《塑料》2011年第4期40-43,共4页Plastics

摘　　要：在扩链剂Joncryl和增塑剂乙酰柠檬酸三丁酯存在下,采用微米级碳酸钙对聚乳酸(PLA)基体进行了高填充改性,制备碳酸钙高填充聚乳酸基复合材料,并用电子拉力机、扫描电镜、ARES流变仪等手段对材料的结构与性能等进行测试与表征。结果表明:碳酸钙高含量时可以明显提高材料的拉伸强度、弯曲强度,而材料的冲击强度会有所下降,但质量含量在30%～60%时复合材料的冲击强度仍高于纯聚乳酸。随碳酸钙含量的增加,材料的储能模量逐渐增大。碳酸钙的加入可以提高材料的弹性,材料的剪切黏度随剪切速率的增大而逐渐降低。Poly（lactic acid）（PLA） composite was studied by filling with high calcium carbonate in present of chain extender Joneryl and plasticizer ATBC. The structure and properties of composite were carefully tested and characterized by electronic tensile testing machine, SEM, ARES Rheometer. Experimental results showed that the tensile strength and flexural strength were greatly improved with high content of CaCO3 , but the impact strength got some loss. However, the impact strength of the composites was still higher than pure PLA when the content of CaCO3was from 30 % to 60 %. The storage modulus and elasticity of the composites increased with the increase of CaCO3 content. The shear-viscosity of the composites decreased with the increasing of shear rate.

关 键 词：聚乳酸 填充改性 碳酸钙 增韧 复合材料 

分 类 号：Q946.816[生物学—植物学]