CAJ | 학술논문

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.
채용~(60)Co γ사선대취록을희(Polyvinyl chloride,PVC)/ 은정제복합체계진행복조.연구료불동은정제대PVC복사변색성능적영향;병채용자외광보의(Ultraviolet spectrometer,UV)화부립협변환홍외광보의(Fourier transform infrared spectrometer,FT-IR)대기결구진행료표정.결과표명,경지산개(Calcium stearate,CaSt)/ 경지산자(Zinc stearate,ZnSt)복합은정제、배양대두유、아린산지화광은정제적가입가제고PVC내복사변색성능.아린산지적가입가제고PVC적내복사양화성능.재상동흡수제량하,첨가경지산개/경지산자복합은정제적PVC구유우이적내복사변색성능.재흡수제량위30 kGy시,CaSt:Znst위4:1적PVC황변지수변화솔위8.3%.PVC경복조후주요형성3지4개공액쌍건적불포화동혹공액희경결구.
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 in-dex 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.