Microcellular foaming and mechanical properties of iPP-iPPF using supercritical CO2

被引：2

作者：

Zuo, Kailong ^{[1
]}

Li, Kun ^{[1
]}

Yun, Zhigeng ^{[1
]}

He, Guangjian ^{[2
]}

Islam, Syed Rashedul ^{[3
]}

Yang, Yang ^{[1
]}

Zhang, Xiaoli ^{[1
]}

Chen, Jingbo ^{[1
]}

机构：

[1] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

[2] South China Univ Technol, Guangdong Prov Key Lab Tech & Equipment Macromol A, Guangzhou 510006, Peoples R China

[3] Donghua Univ, Coll Text, Key Lab Text Sci & Technol, Minist Educ, Shanghai 201620, Peoples R China

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2022年 / 190卷

基金：

中国国家自然科学基金;

关键词：

Isotactic polypropylene; Microcellular foaming; Partially melted polypropylene fiber; Mechanical property; CELL STRUCTURE; NUCLEATING-AGENT; POLYPROPYLENE; BEHAVIOR; CRYSTALLIZATION; COMPOSITES; BLENDS; POLYSTYRENE; MORPHOLOGY;

D O I：

10.1016/j.supflu.2022.105754

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Isotactic polypropylene (iPP) is one of the most widely used commercial polymers in the industry. However, it is difficult to foam iPP due to its low melt strength. In this work, the foamability and mechanical properties of iPP were investigated by incorporating isotactic polypropylene fiber (iPPF), using a batch foaming method. Compared to the neat iPP foams, smaller cell size and more uniform cell size distribution were obtained for iPP-iPPF. When 30 % iPPF was added, the cell density of iPP-iPPF foam was 1.1 x 1010 cells/cm3 which was twice that of the neat iPP foam. It was attributed to the improved melt strength and heterogeneous nucleation of iPPF in the iPP matrix. In addition, the impact strength of foamed iPP-30iPPF was found to be increased by 136 % compared to its neat iPP counterpart. Furthermore, the tensile strength of the foamed samples also increased with the increasing iPPF content.

引用

页数：8

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