Effects of Nano-CaCO3 Content on the Crystallization, Mechanical Properties, and Cell Structure of PP Nanocomposites in Microcellular Injection Molding

被引：53

作者：

Mao, Huajie ^{[1
,2
,3
]}

He, Bo ^{[1
,2
,3
]}

Guo, Wei ^{[2
,3
,4
]}

Hua, Lin ^{[2
,3
,4
]}

Yang, Qing ^{[2
,3
,4
]}

机构：

[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China

[2] Wuhan Univ Technol, Hubei Key Lab Adv Technol Automot Components, Wuhan 430070, Hubei, Peoples R China

[3] Hubei Collaborat Innovat Ctr Automot Components T, Wuhan 430070, Hubei, Peoples R China

[4] Wuhan Univ Technol, Sch Automot Engn, Wuhan 430070, Hubei, Peoples R China

来源：

POLYMERS | 2018年 / 10卷 / 10期

基金：

中国国家自然科学基金;

关键词：

microcellular injection molding; nano-calcium carbonate; crystallization; cell structure; mechanical properties; POLYLACTIDE;

D O I：

10.3390/polym10101160

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Using supercritical nitrogen as the physical foaming agent, microcellular polypropylene (PP) nanocomposites were prepared in microcellular injection molding. The main purpose of this work is to study effects of content of nano-CaCO3 on the crystallization, mechanical properties, and cell structure of PP nanocomposites in microcellular injection molding. The results show that adding nano-CaCO3 to PP could improve its mechanical properties and cell structure. The thermal stability and crystallinity enhances with increase of nano-CaCO3. As a bubble nucleating agent, adding nano-CaCO3 to PP improves the cell structure in both the parallel sections and vertical sections. The mechanical properties increase first and then decrease with increase of nano-CaCO3. The mechanical properties are affected by the cell structure, as well. The mechanical properties and cell structure are optimum when the content of nano-CaCO3 is 6 wt %.

引用

页数：18

共 19 条

[1] Polypropylene/carbon nanotube nano/microcellular structures with high dielectric permittivity, low dielectric loss, and low percolation threshold [J].