Study on the effect of stabilizers on discoloring of PVC by irradiation

PENG Chaorong; WANG Jingxia; CHEN Zhuping; LIU Siyang

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Study on the effect of stabilizers on discoloring of PVC by irradiation

更新时间：2023-03-30

- Study on the effect of stabilizers on discoloring of PVC by irradiation
- Journal of Radiation Research and Radiation Processing Vol. 27, Issue 6, Pages: 350-354(2009)
- 作者机构：
  
  1.四川省原子能研究院　成都　610066
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PENG Chaorong, WANG Jingxia, CHEN Zhuping, et al. Study on the effect of stabilizers on discoloring of PVC by irradiation. [J]. Journal of Radiation Research and Radiation Processing 27(6):350-354(2009)
DOI：

PENG Chaorong, WANG Jingxia, CHEN Zhuping, et al. Study on the effect of stabilizers on discoloring of PVC by irradiation. [J]. Journal of Radiation Research and Radiation Processing 27(6):350-354(2009) DOI：

摘要

采用,60,Co γ射线对聚氯乙烯（Polyvinyl chloride，PVC）/ 稳定剂复合体系进行辐照。研究了不同稳定剂对PVC辐射变色性能的影响；并采用紫外光谱仪（Ultraviolet spectrometer，UV）和傅立叶变换红外光谱仪（Fourier transform infrared spectrometer，FT-IR）对其结构进行了表征。结果表明，硬脂酸钙（Calcium stearate，CaSt）/ 硬脂酸锌（Zinc stearate，ZnSt）复合稳定剂、环氧大豆油、亚磷酸酯和光稳定剂的加入可提高PVC耐辐射变色性能。亚磷酸酯的加入可提高PVC的耐辐射氧化性能。在相同吸收剂量下，添加硬脂酸钙/硬脂酸锌复合稳定剂的PVC具有优异的耐辐射变色性能。在吸收剂量为30 kGy时，CaSt：Znst为4：1的PVC黄变指数变化率为8.3%。PVC经辐照后主要形成3至4个共轭双键的不饱和酮或共轭烯烃结构。

Abstract

Composites of polyvinyl chloride (PVC) filled with stabilizers was irradiated by ,60,Co γ-ray. The effect of different stabilizers on the radiation-induced discoloring of PVC was investigated and the structures of irradiated PVC were characterized by ultraviolet spectrum (UV) and Fourrier transfer infrared spectrum (FT-IR). It shows that the stabilizers including calcium stearate / zinc stearate, epoxidised oil, phosphite and photostabilizer can improve the property of resistance to radiation-induced discoloring of PVC, and phosphite can improve the property of resistance to radiation-induced oxidation of PVC. Among the stabilizers, formulations with calcium stearate/zinc stearate show high transparency and excellent property of resistance to radiation at same absorbed dose. Change rate of yellow index of formulation (calcium stearate: zinc stearate=2:1) has been determined to be 8.3% at the absorbed dose of 30 kGy. It has been found that the structures of PVC with numbers of conjugated double bond or α, β-unsaturated ketone are formed after irradiation by γ-rays.

关键词

聚氯乙烯稳定剂辐射变色

Keywords

Polyvinyl chlorideStabilizerRadiationDiscoloring

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