PLA协同纳米CaCO3增韧PP的研究

doi:10.19491/j.issn.1001-9278.2019.02.006

中国塑料 ›› 2019, Vol. 33 ›› Issue (2): 29-34.DOI: 10.19491/j.issn.1001-9278.2019.02.006

PLA协同纳米CaCO₃增韧PP的研究

崔颖1，张克宏1,2*，肖慧1，苏羽航2，吴燕蓉1

1. 安徽农业大学轻纺工程与艺术学院
2. 福建师范大学食品软塑包装技术福建省高校工程研究中心

收稿日期:2018-09-06 修回日期:2018-10-22 出版日期:2019-02-26 发布日期:2019-03-26
基金资助:
食品软塑包装技术福建省高校工程研究中开放课题（G1-KF1708）；安徽省省级大学生创新创业训练计划项目（201710364081）；国家级大学生创新创业训练计划项目（201810364069）

Synergistic Effect of PLA/CaCO₃ on Properties of Polypropylene Compounds

Received:2018-09-06 Revised:2018-10-22 Online:2019-02-26 Published:2019-03-26

摘要/Abstract

摘要： 通过熔融共混制得聚丙烯/聚乳酸/纳米碳酸钙（PP/PLA/CaCO3）复合材料，考察了PLA和纳米CaCO3对复合材料力学性能、热性能、流变性能与结晶形态的影响及其作用机理。结果表明，复合材料中形成连续空间网络结构的PLA有助于改善PP的性能，PLA含量为20 %（质量分数，下同）时复合材料综合力学性能最佳；与纯PP相比，加入PLA后的复合材料拉伸强度和冲击强度分别提高5.1 %和54.4 %，断裂伸长率降低62.5 %；纳米CaCO3通过“滚珠增韧”和“异相成核”作用明显改善复合材料力学性能，纳米CaCO3含量15 %时产生的晶粒细化作用效果最为显著，复合材料综合力学性能达到最佳，拉伸强度、断裂伸长率和冲击强度分别比未添加CaCO3时提升了15.2 %、2.7 %和5.6 %。

Abstract: PP/PLA/CaCO3 compounds were prepared by a melt blending method, and the effects of PLA and CaCO3 nanoparticles on the mechanical properties, thermal property, rheological behavior and crystallization of compounds were investigated. The results indicated that the mechanical properties of compounds were improved with the addition of PLA due to the formation of a PLA continuous spatial network in the PP matrix. The compounds achieved optimum comprehensive mechanical performance when 20 wt% of PLA was introduced. Their tensile strength and impact strength increased by 5.1 % and 54.4 %, respectively, but the elongation at break decreases by 62.5 % compared to pure PP. A significant improvement in mechanical properties is ascribed to the “ball bearing” and nucleation effects of CaCO3 in the PP matrix. The CaCO3 nanoparticles were observed to be distributed in the PP/PLA matrix uniformly at a content of 15 wt%, leading to an optimum grain refining effect accordingly. The PP/PLA/CaCO3 ternary compounds obtained an increase in tensile strength by 15.2 %, in elongation at break by 2.7 % and in impact strength by 5.6 % compared to PP/PLA binary compounds.

崔颖张克宏肖慧苏羽航吴燕蓉. PLA协同纳米CaCO₃增韧PP的研究[J]. 中国塑料, 2019, 33(2): 29-34.

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PLA协同纳米CaCO₃增韧PP的研究

Synergistic Effect of PLA/CaCO₃ on Properties of Polypropylene Compounds

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