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首页> 外文会议>European Conference on Additives amp; Colors; 20070314-15; Mondorf-les-Bains(LX) >THE EFFECT OF PIGMENTS ON THE THERMAL AND PHOTCHEMICAL STABILITY OF POLYPROPYLENE
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THE EFFECT OF PIGMENTS ON THE THERMAL AND PHOTCHEMICAL STABILITY OF POLYPROPYLENE

机译：颜料对聚丙烯热和光化学稳定性的影响

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摘要

The effect of organic and inorganic pigments (green, blue and red) on the thermal, mechanical (tensile strength, elongation, modulus, impact), shrinkage and color properties of UV stabilised homo polypropylene (PP) was investigated. The stabilised and pigmented PP compositions were exposed to aging at room temperature, at 120℃ and UV radiation (QUV-B). Results have shown that the crytallisation temperature increased in the case of organic pigments from 112℃ to a maximum of 129℃ after the injection molding stage. Upon aging at 120℃ the crytallinity increased from 64% to 72% and after QUV exposure the crystallization temperature increased to 130°C. Simultaneously, the shrinkage is increased and the color is highly affected by the exposure to UV radiation. Following injection molding the impact strength, tensile modulus and yield strength are increased and the elongation decreased. Following aging at room temperature changes in mechanical properties are in the 10 to 20% range. However, aging at 120℃ causes disintegration of the inorganic red pigment after 30 days and that of organic blue and green after 60 days. The organic red and inorganic green and bluepigments exhibited good thermal aging stability. It was concluded that the incorporation of organic as well as inorganic pigments with PP could be detrimental to the mechanical and color properties following exposure to thermal and photochemical aging.
机译：研究了有机和无机颜料（绿色，蓝色和红色）对紫外线稳定的均聚丙烯（PP）的热，机械（拉伸强度，伸长率，模量，冲击），收缩率和颜色性能的影响。稳定且着色的PP组合物在室温，120℃和UV辐射（QUV-B）下老化。结果表明，在注塑成型后，有机颜料的结晶温度从112℃升高到最高129℃。在120℃老化后，结晶度从64％增加到72％，暴露于QUV之后，结晶温度上升到130°C。同时，收缩率增加，并且颜色受到紫外线辐射的强烈影响。注射成型后，冲击强度，拉伸模量和屈服强度增加，而伸长率降低。在室温下老化后，机械性能的变化在10％到20％的范围内。然而，在120℃下老化会导致30天后无机红色颜料的分解，以及60天后有机蓝色和绿色的分解。有机红色和无机绿色和蓝色颜料表现出良好的热老化稳定性。结论是，将有机颜料和无机颜料与PP混合会损害热老化和光化学老化后的机械和颜色性能。

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