3种三硫酯RAFT剂的制备及表征

Synthesis and characterization of three trithiocarbonates rversible addition-fragmentation chain transfer agents

在强碱条件下,分别以四丙基溴化铵和三辛基甲基氯化铵(Aliquot 336)为相转移催化剂,十二烷基硫醇与二硫化碳反应,制备了3种三硫酯型可逆加成-断裂链转移剂(RAFT).以1 H-NMR、13C-NMR、傅里叶变换红外(FTIR),元素分析和差失扫描量热(DSC)对产物进行表征.证明所得产物为目标物,所提产物可应用于本体或溶液体系的RAFT聚合.

The preparation of reversible addition-fragmentation chain transfer （RAFT） agents Is the base of polymer architectures via RAFT polymerization. Three trithiocarbonate RAFT agents were syneth- sized in strong alkaline conditions with dodecyl mercaptan and carbon disulfide by phase transfer cataly- sis tetrapropyl-ammonium bromide and tricaprylylmethyl-ammonium chloride （Aliquot 336）, respective- ly. The products were characterized by ~H--NMR,~3 C-nuclear magnetic resonance spectroscopy （NMR）, Fourier transform infrared （FTIR）, the element analysis and differential scanning calorimetry （DSC）. The results show that the proofs of product are the target products. The phase transfer mecha- nism is presented and clarified the reaction processes. The RAFT agents could be used in bulk or solu- tion polymerization, or modified to prepare macroinitiators.