CAJ | 학술논문

由于独特的分子结构，超支化聚合物具有许多特殊性能和应用．基于可逆加成断裂链转移(RAFT)聚合在制备复杂结构聚合物上的独特优势，本研究通过双官能团的二(二甲基乙酰氯)三硫代羰基酯(BDACT)和三官能团的三羟甲基丙烷(TMP)的缩聚反应，得到了超支化大分子 RAFT 试剂(H-RAFT-A)，并利用核磁(1H-NMR)、红外(FTIR)和高效凝胶渗透色谱(GPC)等手段对 H-RAFT-A 进行了表征．研究结果表明，BDACT 和 TMP 在合适的反应条件下，能够避免凝胶现象，制备出较高分子质量的 H-RAFT-A，其相对分子质量分布系数约为2.78，支化度约为0.41．随后，以所制备的 H-RAFT-A 为 RAFT 试剂，苯乙烯为单体，制备出超支化的聚苯乙烯(H-PSt)．该研究为利用成本低廉的烯类单体制备超支化聚合物提供了新思路．
유우독특적분자결구，초지화취합물구유허다특수성능화응용．기우가역가성단렬련전이(RAFT)취합재제비복잡결구취합물상적독특우세，본연구통과쌍관능단적이(이갑기을선록)삼류대탄기지(BDACT)화삼관능단적삼간갑기병완(TMP)적축취반응，득도료초지화대분자 RAFT 시제(H-RAFT-A)，병이용핵자(1H-NMR)、홍외(FTIR)화고효응효삼투색보(GPC)등수단대 H-RAFT-A 진행료표정．연구결과표명，BDACT 화 TMP 재합괄적반응조건하，능구피면응효현상，제비출교고분자질량적 H-RAFT-A，기상대분자질량분포계수약위2.78，지화도약위0.41．수후，이소제비적 H-RAFT-A 위 RAFT 시제，분을희위단체，제비출초지화적취분을희(H-PSt)．해연구위이용성본저렴적희류단체제비초지화취합물제공료신사로．
Hyperbranched polymers have many unique properties and applications. Based on the special performance on synthesizing well-defined polymers of reversible addition fragmentation chain transfer(RAFT)polymerization,a kind of hyperbranched macro RAFT agent(H-RAFT-A)was designed and prepared by polycondensation reaction of difunctional S,S-bis(α,α′-dimethyl-α′′-acetyl chloride)-trithiocarbonate(BDACT)and trifunctional trimethylol-propane(TMP). The chemical structures of the prepared H-RAFT-A were investigated by1HNMR,FTIR and GPC. The results indicated that high molecular mass and non-crosslinked H-RAFT-A could be obtained,relative molecular mass polydispersity coefficient being 2.78 and branching degree being 0.41. With H-RAFT-A as RAFT reagentand styrene as the comonomer,the hyperbranched polystyrene(H-PSt)was controllably synthesized. These research re-sults shed light on synthesizing hyperbranched polymers by using low-cost vinyl monomers.