Preparation of Poly(vinyl chloride)-Based UV Absorbents and Their Resistence Property of Photoaging
Year: 2016
Type: article
Abstract: Poly(vinyl chloride) (PVC)-based light stabilizer was prepared by introducing the lower molecular UV absorbents into PVC using quantitative click reaction, which could avoid some defects (low permanence of light aging resistance property and environmental pollution) caused by poor polymer compatability of low molecular UV absorbent.Azide groups were firstly introduced into the backbone of PVC via a nucleophilic reaction to obtain PVC-N 3 with different substitutive rate, and 2,4-dihydroxy-benzophenone (2,4-DHBP) was treated with propargyl bromide to prepare alkynyl-containing 2-hydroxy-4-(prop-2-ynyloxy)benzophenone (2,4-DHBP-P).Then, copper-catalyzed Husigen-Click cycloaddition reaction was performed between the pendant azide groups of PVC-N 3 and alkynyl of 2,4-DHBP-P to afford the desired PVC-based UV absorbents (2,4-DHBP-PVC) with different amounts of benzophenone moieties.These 2,4-DHBP-PVC showed great resistance to photoaging while exposed to UV irradiation.Their ratio of carbonyl to methylene group were far lower than that of pure PVC (0.3331) after UV irradiating for 200 h, and the minimum value is about 0.03998.Keywords poly(vinyl chloride); UV absorbents; photoaging 聚氯乙烯[poly(vinyl chloride), PVC]具有难燃(阻燃 值为 40 以上)自熄、耐化学药品性好、电绝缘性能好、 耐磨、消声消震、较高的强度、气密性好和材料来源广 等优点, 在生产生活中得到了广泛的应用, 可用于制造: 管道, 窗框, 地板, 墙纸, 窗帘,
Institution: PLA Army Engineering University
Language: English
Topic: Polymer Science and PVC
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2537912802