The effect of processing parameters on cell structure and mechanical properties of extrusion-foamed poly(vinyl chloride) sheets

被引：5

作者：

Wang, Mingyi ^{[1
]}

Liu, Jianxiu ^{[1
]}

Hu, Jun ^{[2
]}

Zhou, Nanqiao ^{[2
]}

机构：

[1] Zhengzhou Univ Light Ind, Mech & Elect Engn Inst, Zhengzhou 450002, Peoples R China

[2] South China Univ Technol, Natl Engn Res Ctr Novel Equipment Polymer Proc, Minist Educ, Key Lab Polymer Proc Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

JOURNAL OF VINYL & ADDITIVE TECHNOLOGY | 2016年 / 22卷 / 03期

基金：

中国国家自然科学基金;

关键词：

SUPERCRITICAL CARBON-DIOXIDE; FOAMING BEHAVIOR; COPOLYMERIZED POLYPROPYLENE; MICROCELLULAR FOAM; FIBER COMPOSITES; CO2; MORPHOLOGY; BLENDS; PVC; POLYSTYRENE;

D O I：

10.1002/vnl.21456

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The objective of this study was to investigate the effect of processing parameters on cell structure and mechanical properties of extrusion-foamed poly(vinyl chloride) sheets. For this purpose, the effects of screw speed and die temperature on cell morphology, density, and mechanical properties, including tensile strength, elongation at break, flexural strength, and notched impact strength of the foam samples, were determined under the same conditions. The experimental results indicated that the extrusion-foaming process was comparatively stable as the screw speed changed in the range of 5.5-8.5 rpm. It was also shown that the lower the die temperature, the higher the die pressure and pressure drop rate, which is conducive to uniform bubble nucleation. In addition, the lower die temperature was beneficial for bubble solidifying and shaping. Therefore, in the range of temperature allowed, the lower the die temperature, the foamed poly(vinyl chloride) sheets with better cell structure and mechanical performance can be obtained. J. VINYL ADDIT. TECHNOL., 22:377-383, 2016. (c) 2014 Society of Plastics Engineers

引用

页码：377 / 383

页数：7

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