111. Single crystals of crystalline block copolymers formed in n-hexanol and methanol/DMF solutions: A comparative study
作者：Wangqian Zhuo, Yanming Li, Runke Zhang, Runsheng Huang, Jie Zhou, Zaizai Tong* and Guohua Jiang*
關(guān)鍵字：crystallization; morphologies
論文來(lái)源：期刊
具體來(lái)源：Journal of Applied Polymer Science, DOI: 10.1002/app.45089
發(fā)表時(shí)間：2017年
Lamellar single crystals of poly(?-caprolactone) (PCL)-based crystalline/liquid-crystalline block copolymer (BCP) were prepared from two methods: solution crystallization in n-hexanol, as well as addition of methanol dropwise to BCP/DMF solution. The crystalline morphologies of PCL single crystals prepared at different temperatures were investigated. It was observed that well-developed single crystals were formed in n-hexanol at high crystallization temperatures, while low crystallization temperatures favored to fabricate well-developed nanosheets in methanol/DMF. Annealing at the melting temperature of single crystals yielded the crystalline seeds and unimers in n-hexanol, while it formed spherical micelles in methanol/DMF system. As a result, the size of single crystals inn-hexanol could be tuned by addition of different ratios of unimer/seed.