中文摘要：

通过^1H 、^13C核磁共振方法对对．氯苯乙烯（S）和丙烯酸甲酯（M）梯度共聚物的单体组成以及以M为中心的三元组序列结构的组成变化进行了研究，并计算了共聚物中以M为中心的三元组和以S为中心的三元组序列结构的瞬时生成概率。在对以M为中心的三元组序列结构变化规律的研究中，核磁共振的实验和瞬时生成概率的计算得到了相同的结果，表明了这两种方法在表征梯度共聚物微观结构中具有相辅性。

英文摘要：

Triad microstructures of gradient copolymers of p-chlorostyrene （S） and methyl acrylate （M） polymerized via atom transfer radical polymerization （ATRP） were studied by Nuclear Magnetic Resonance （NMR） and instantaneous propagation probabilities, which denote a probability of a M/S- centered triad formed at the end of polymer chain under the different points of conversions. The consistency between the results both from the NMR experiments and from the calculations of instantaneous propagation probabilities indicates that these two methods could be compensated in the triad microstructure elucidation of polymers.