作　　者： ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《合成树脂及塑料》 2013年第3期39-41,48,共4页

摘　　要： 研究了纳米碳酸钙(nano-CaCO3)用量及拉伸速率对聚左旋乳酸(PLLA)/nano-CaCO3复合材料拉伸性能的影响。结果表明:随着nano-CaCO3用量的增加,复合材料的拉伸弹性模量不断增加,当填充量为4 phr时,复合材料拉伸弹性模量比PLLA最大可提高58.3%;最大拉伸强度、拉伸断裂应力及断裂拉伸应变却不断减小。当nano-CaCO3含量相同时,拉伸速率越高,拉伸弹性模量和断裂拉伸应变越高,拉伸强度和拉伸断裂应力却随着拉伸速率的提高先增大后减小。 The authors studied the influences of the nano-CaCO3 content and tensile speed on tensile prop- erties of poly （levorotary lactic acid） （PLLA）/nano-CaCO3 composites. The results show that the modulus of elasticity in tension of the PLLA composites increases with the rise in nano-CaCO3 content, and it increases up to 58.3% in comparison with that of PLLA when the filling content is 4 phr. However, the largest tensile strength, tensile stress at break and tensile strain at break decrease constantly. Under the conditions of the same nano-Ca- CO3 content, the higher the tensile speed is, the higher the modulus of elasticity in tension and the tensile strain at break are. While the tensile strength and tensile stress at break first increase, and then reduce as the tensile speed is augmented.

关 键 词： 聚左旋乳酸 纳米碳酸钙 拉伸速率 拉伸性能

领　　域： [化学工程]