作者：Kai Zheng, Ruigang Liu*, Hongliang Kang, Xia Gao, Deyan Shen, Yong Huang
关键字：Syndiotactic polystyrene, Induced circular dichroism, Chirality
论文来源：期刊
具体来源：Polymer 2011, 52, 3671-3676
发表时间：2011年

The induced circular dichroism (ICD) syndiotactic polystyrene (sPS) chiral films in sPS δ phase were prepared and the chirality of the ICD sPS films upon annealing at different temperature were investigated. The sPS δ crystals in the ICD films transform into γ and then into α crystals as those of achiral sPS δ crystals during annealing at different temperature. The CD signal intensity at λ of 200 nm remains unchanged during the δ to γ crystalline transformation, but enhanced tremendously during the γ to α crystalline transformation. The amplification CD signal attributes to the closer package of the phenol rings in sPS α phase than that in sPS δ and γ phases. The lamellae grown at a temperature above the γ to α transition follow the chiral aggregation structure, which also contribute to the amplification of the CD signal.