Notroxide Mediated Radical Polymerization of Styrene Irradiated by TEMPO with UV Light
- 材料学院－已发表论文 
[中文文摘]在UV光照射下,以Irgacure 1103/TEMPO为引发剂,实现了苯乙烯的低温光引发可控聚合,得到了低分散性的聚苯乙烯.与热引发聚合相比较,光聚合的反应条件更温和,聚合速率更快.探讨了聚合体系中光引发剂及光强等因素的影响,实现了光聚合产物的扩链反应.[英文文摘]Nitroxide mediated radical polymerization(NMRP) was employed to synthesize polystyrene in the presence of TEMPO irradiated with UV light at 50 ℃. The polymerization exhibited the characteristic of a controlled polymerization. In comparison with the thermal-initiated polymerization, the condition of UV-irradiated polymerization is milder and the rate is faster. The photopolymerization can be realized at 50 ℃ and the conversion can reach 99% within 10 h. The influence of concentration of photo-initiator and light intensity was discussed. The molecularweight can be controlled in the range of 3×104 —1 ×105 and the higher light intensity is good for controlling the polymerization.