文献类型：期刊文献

英文题名：Application of polybenzimidazole as a panchromatic ultraviolet absorber in poly(vinyl chloride) film

作者：Zhang, Xiaodan[1];Cai, Yangben[1];Teng, Xin[1];Nan, Bohua[2];Xu, Shiai[1,3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Aerosp Equipments Manufacture Co Ltd, Shanghai 200245, Peoples R China;[3]Qinghai Univ, Sch Chem Engn, Xining 810016, Qinghai, Peoples R China

年份：2019

卷号：194

起止页码：171

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20184606064005);WOS:【SCI-EXPANDED(收录号:WOS:000452815000018)】；

基金：This research is financially supported by the National Natural Science Foundation of China (21764011), the Foundation from Qinghai Science and Technology Department (2017-HZ-803), Thousand Talents Program of Qinghai Province, Kunlun Scholar Award Program of Qinghai Province and Shanghai Aerospace Science and Technology Innovation Foundation.

语种：英文

外文关键词：Poly(vinyl chloride); Polybenzimidazole; Ultraviolet resistance; Accelerated ultraviolet aging; Light stabilizer

摘要：The exposure of poly(vinyl chloride) (PVC) materials to ultraviolet (UV) light can result in the destruction of the molecular structure and consequently a reduction of their mechanical properties. In this study, polybenzimidazole (OPBI) with panchromatic UV absorption was prepared by solution polycondensation and then used as a light stabilizer to improve the UV-resistance properties of PVC. PVC/OPBI composite films with different compositions were prepared by solution casting method, and the effects of OPBI content and UV irradiation time on the properties of these films were investigated by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, thermogravimetric analysis, dynamic mechanical analysis and tensile test. The results show that OPBI has excellent UV absorption properties in the region of 220-420 nm and high thermal stability with a 3.0% weight loss at 550 degrees C in nitrogen atmosphere. The PVC/OPBI composite films also show excellent mechanical properties with a yield strength of 46.1-53.4 MPa, which can be attributed to the strong interactions among benzene rings, heterocyclic imidazole and chlorine atoms between OPBI and PVC. The special conjugated structure of OPBI allows the PVC/OPBI composite films to have high UV absorption and excellent mechanical properties, thus making it a promising light stabilizer. (C) 2018 Elsevier Ltd. All rights reserved.