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WANG Mouhua; XING Zhe; LIU Weihua; ZHANG Wenfa; ZHANG Wenli; WU Guozhong

doi:10.11889/j.1000-3436.2014.rrj.32.020303

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更新时间：2021-12-01

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- Journal of Radiation Research and Radiation Processing Vol. 32, Issue 2, Pages: 20303-020303(2014)
- 作者机构：
  
  1. （中国科学院上海应用物理研究所嘉定园区）,上海,201800
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- DOI：10.11889/j.1000-3436.2014.rrj.32.020303
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WANG Mouhua, XING Zhe, LIU Weihua, et al. [J]. Journal of Radiation Research and Radiation Processing 32(2):20303-020303(2014)
DOI：

WANG Mouhua, XING Zhe, LIU Weihua, et al. [J]. Journal of Radiation Research and Radiation Processing 32(2):20303-020303(2014) DOI： 10.11889/j.1000-3436.2014.rrj.32.020303.

摘要

对γ-射线辐射改性聚丙烯(PP)进行超临界二氧化碳(CO2)发泡研究。用差示扫描热仪(DSC)、高级流变扩展系统(ARES)、熔体流动速率测试仪和扫描电镜(SEM)分别对辐射改性PP样品的熔点、粘度、熔体流动速率和PP泡沫的微孔形貌进行了表征。结果表明，经过γ-射线辐照后PP熔点略有降低，粘度随吸收剂量的增加而明显降低。PP经过辐射改性后的发泡性能得到改善，辐射改性PP容易获得发泡倍率更高的泡沫，同等发泡压力下辐射改性PP需要较低的发泡温度。

Abstract

Polypropylene (PP) was irradiated by γ-rays, and then foamed with supercritical carbon dioxide. The effect of absorbed dose on melting temperature, shearing viscosity, and melt mass-flow rate (MFR) of radiation modified PP was characterized by means of differential scanning calorimeter (DSC), advanced rheology expand system (ARES), melt flow rate testing instrument, and the morphology of PP foam was investigated by scanning electron microscopy (SEM). The results showed that the melting temperature and viscosity of PP decreased after γ-ray irradiation. The foamability of radiation modified PP is improved and a higher foam volume expansion ratio is obtained after radiation modification. At a given foaming pressure, foaming of radiation modified PP needs a lower temperature than that of original PP.Cited

关键词

聚丙烯泡沫超临界二氧化碳辐射改性

Keywords

Polypropylene foamSupercritical carbon dioxideRadiation modification

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School of Nuclear Science and Technology, University of Science and Technology of China

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1(Peking University Shenzhen Institute,,)

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DOI：10.11889/j.1000-3436.2014.rrj.32.020303

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