Polymerization of styrene with tetramethylthiuram disulfide as an initiator in the presence of 2,2,6,6‐tetramethyl‐1‐piperidinyloxy
Polymerization of styrene with tetramethylthiuram disulfide as an initiator in the presence of 2,2,6,6‐tetramethyl‐1‐piperidinyloxy
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在 2,2,6,6-四甲基-1-哌啶氧基存在下，以二硫化四甲基秋兰姆为引发剂进行苯乙烯聚合
DOI：
10.1002/pola.20533
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Jian Zhu
中科院分区：
文献类型：
--
作者：
Wenjian Xu;Xiu;Zhenping Cheng;Gaojian Chen;Jian Zhu
在2，2，6，6-四甲基-1-哌啶氧基(TEMPO)存在下，以四甲基硫脲二硫化物(TMTD)为引发剂，在123℃下研究了苯乙烯的本体聚合。聚合反应以可控/活性的方式进行，即聚合速率与单体浓度呈一级关系，相对分子质量随转化率呈线性增加。所得聚合物的相对分子质量接近理论值，且分子量分布较小(重均相对分子质量/数均相对分子质量=1.1~1.3)。在TEMPO存在下，以TMTD为引发剂的聚合速度比以过氧化苯甲酰为引发剂的聚合速度快，且与TMTD的初始浓度无关。用紫外光敏化-Sc(S)N(CH3)2基团对合成的聚苯乙烯进行了官能化处理，并用核磁共振氢谱对其进行了表征。
The bulk polymerization of styrene was investigated with tetramethylthiuram disulfide (TMTD) as an initiator in the presence of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) at 123 °C. The polymerization proceeded in a controlled/living way; that is, the polymerization rate was first-order with respect to the monomer concentration, and the molecular weight increased linearly with conversion. The molecular weights of the polymers obtained were close to the theoretical values, and the molecular weight distributions were relatively low (weight-average molecular weight/number-average molecular weight = 1.1-1.3). The rate of polymerization with TMTD as an initiator was faster than that with benzoyl peroxide, and the rate was independent of the initial concentration of TMTD in the presence of TEMPO. The obtained polystyrene was functionalized with ultraviolet-light-sensitive -SC(S)N(CH 3 ) 2 groups, which was characterized with 1 H NMR spectroscopy.