Chin. J. Org. Chem. ›› 2016, Vol. 36 ›› Issue (8): 1963-1969.DOI: 10.6023/cjoc201512046 Previous Articles     Next Articles

NOTE

聚氯乙烯基紫外光吸收剂的制备及其抗光老化性能研究

武国晶, 朱超, 翁枭迪, 孙晓东, 吕绪良   

  1. 解放军理工大学 电磁环境效应与光电工程重点实验室 南京 210007
  • 收稿日期:2015-12-31 修回日期:2016-03-22 发布日期:2016-04-05
  • 通讯作者: 吕绪良 E-mail:xllu1957@126.com

Preparation of Poly(vinyl chloride)-Based UV Absorbents and Their Resistence Property of Photoaging

Wu Guojing, Zhu Chao, Weng Xiaodi, Sun Xiaodong, Lü Xuliang   

  1. Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, PLA University of Science & Technology, Shanghai 210007
  • Received:2015-12-31 Revised:2016-03-22 Published:2016-04-05

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-N3 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-N3 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.

Key words: poly(vinyl chloride), UV absorbents, photoaging