自制光稳定剂HWPAN-g-TiO2与几种光稳定剂对聚丙烯性能的对比研究

利用废旧腈纶织物制备了一种聚丙烯（PP）用大分子紫外屏蔽吸收类型光稳定剂，利用其和通用的受阻酚类光稳定剂分别制备耐候性PP复合材料，并进行了人工加速老化实验。探究了大分子紫外屏蔽吸收类型光稳定剂在PP老化过程中对PP老化降解的影响，并与通用的受阻酚类光稳定剂进行了对比研究。结果表明，大分子紫外屏蔽吸收类型光稳定剂效果明显，在人工加速老化500 h之后，PP的羰基指数高达150.3；而PP/HWPAN-g-TiO2仅为53，与此同时，PP的拉伸强度从25 MPa降至6.9 MPa，下降了72.4 %；而PP/HWPAN-g-TiO2的拉伸强度从29 MPa降至25 MPa，下降13.8 %。

A Comparative Investigation on Aging Performance of Polypropylene Modified with HWPAN-g-TiO2 and Other Light Stabilizers

A type of macromolecular light stabilizers with UV absorbing and shielding performance was prepared by using waste acrylic fabrics as a raw material, and then the weatherable for polypropylene (PP) based composites were prepared by mixing this light stabilizer with PP and conventional hindered phenolic light stabilizers. The effect of this macromolecular light stabilizer on the aging performance of PP was investigated. Compared with the conventional hindered phenolic light stabilizers, the macromolecular light stabilizer exhibited much better UV absorbing and shielding effects on PP. The carbonyl index of PP reached 150.3 after artificially accelerated aging for 500 h under the UV light, and however, the PP/HWPAN-g-TiO2 composites only achieved a carbonyl index of 53. Moreover, PP/macromolecular light stabilizer composites exhibited a decrease in tensile strength by 72.4 %. On the other hand, PP/HWPAN-g-TiO2 composites only showed a decrease in tensile strength by 13.8 %.