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设计并合成了一种新型含甲酰基同时又含β-蒎烯单元的新单体2-β-蒎氧基-5-乙烯基苯甲醛(POVB),选择苯基双硫代乙酸1-苯基乙酯(PEPDA)为RAFT试剂、以AIBN为引发剂、在60℃下THF中实现了POVB的“活性”/可控RAFT自由基聚合.单体浓度半对数ln([M]0/[M])与聚合时间符合线性关系,聚合过程呈现一级动力学特征;聚合物分子量(Mn)随单体转化率几乎线性增加,而且整个反应过程中分子量分布(Mw/Mn<1.2)保持在较窄的范围.1H-NMR的分析进一步证实了聚合物链的末端精细结构.此外,CD谱结果表明手性单元β-蒎烯基能赋予聚合物以光学活性.
A new type of 2-β-pinaphenoxy-5-vinylbenzaldehyde (POVB) containing both formyl and β-pinene units was designed and synthesized. Phenyl diphthalate (PEPDA) is a RAFT reagent and “active” / controlled RAFT free radical polymerization of POVB is achieved with AIBN as initiator in THF at 60 ° C. Monomer concentration Half logarithm ln ([M] The linear relationship between polymerization time and the polymerization time was obtained. The molecular weight of polymer (Mn) increased almost linearly with the monomer conversion rate, and the molecular weight distribution (Mw / Mn <1.2) ) Remained in the narrower range.1H-NMR analysis further confirmed the terminal fine structure of the polymer chain.In addition, the CD spectra showed that the chiral unit β-pinene can give the polymer an optical activity.