摘要
采用60Coγ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30kGy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。
Composites of polyvinyl chloride （PVC） filled with stabilizers was irradiated by ^60Co 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 T-rays.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
2009年第6期350-354,共5页
Journal of Radiation Research and Radiation Processing
基金
四川省应用基础项目(07JY0002)资助
关键词
聚氯乙烯
稳定剂
辐射
变色
Polyvinyl chloride, Stabilizer, Radiation, Discoloring
