Synthesis of Photodegradable Polystyrene with Trithiocarbonate as Linkages.
Synthesis of Photodegradable Polystyrene with Trithiocarbonate as Linkages.
复制标题
DOI：
10.1002/marc.201500315
复制
发表时间：
2015-10
影响因子：
4.6
通讯作者：
Qianbiao Li;Xiaoqian Hu;Ruke Bai
中科院分区：
文献类型：
--
作者：
Qianbiao Li;Xiaoqian Hu;Ruke Bai
以聚三硫代碳酸盐为链转移剂，通过可逆加成-裂解-链转移聚合制备了以三硫代碳酸盐为键的多嵌段聚苯乙烯（PS）。研究了固态多嵌段聚苯乙烯在室温下的光降解性。实验结果表明，室温紫外光照射下，多嵌段PS中的三硫代碳酸酯键被破坏，多嵌段PS降解为单独的PS嵌段。凝胶渗透色谱测定表明，经紫外光照射745 h后，多嵌段PS的分子量从27 900 g mol（-1）降低到7900 g mol（-1）。此外，对多嵌段PS的热稳定性进行了测试，结果表明，三硫代碳化物的掺入对多嵌段PS的热稳定性影响不大。
Multiblock polystyrenes (PS) with trithiocarbonate groups as linkages are prepared via reversible addition-fragmentation chain-transfer polymerization using polytrithiocarbonate as a chain transfer agent. The photodegradability of the multiblock PS in the solid state is investigated under UV irradiation at room temperature in an air atmosphere. The experimental results demonstrate that the trithiocarbonate linkages in the multiblock PS can be broken under UV light irradiation at room temperature and the multiblock PS is degraded into separate PS blocks. Gel permeation chromatography measurement reveals that the molecular weight of multiblock PS is reduced from 27 900 to 7900 g mol(-1) after UV light irradiation for 745 h. Moreover, the thermal stability of the multiblock PS is examined and the results indicate that the incorporation of trithiocarbonate shows little influence on the thermal stability of multiblock PS.