Effect of Complementary Nucleobase Interactions on the Copolymer Composition of RAFT Copolymerizations
Effect of Complementary Nucleobase Interactions on the Copolymer Composition of RAFT Copolymerizations
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DOI：
10.1021/mz4001833
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发表时间：
2013-07-01
影响因子：
7.015
通讯作者：
O'Reilly, Rachel K.
中科院分区：
文献类型：
--
作者：
Kang, Yan;Lu, Annhelen;O'Reilly, Rachel K.
含腺嘌呤和胸腺嘧啶的甲基丙烯酰型单体已成功合成，收率较高。采用RAFT聚合技术对这两种功能单体进行了均聚和共聚反应。采用非线性最小二乘（NLLS）方法测量和计算了单体对的反应性比，结果证实了单体的反应性与聚合所用溶剂有关。氢键的存在与否影响所得共聚物的组成，在CHCl3中倾向于形成适度的交替共聚物，而在DMF中则倾向于形成统计共聚物。研究了嵌段共聚物的玻璃化转变温度，并研究了嵌段共聚物在不同极性溶剂中的自组装。
Methacryloyl-type monomers containing adenine and thymine have been successfully synthesized with good yields. The homopolymerization and copolymerization of these two new functional monomers were carried out using RAFT polymerization. The reactivity ratios of monomer pairs were measured and calculated using a nonlinear least-squares (NLLS) method, and the results confirmed that the monomer reactivities were dependent on the solvent used for polymerization. The presence and absence of hydrogen bonding affected the resultant copolymer composition where moderate alternating copolymers had a tendency to be formed in CHCl3, while in DMF, statistical copolymers were formed. Furthermore, the glass transition temperatures of the copolymers were investigated, and the self-assembly of block copolymers made in solvents with different polarity were studied.