A review of microphase separation of polyurethane: Characterization and applications oleh Bing-Xu Cheng, Wei-Chen Gao, Xiao-Ming Ren, Xin-Yi Ouyang, Yuan Zhao, Hui Zhao, Wei Wu, Chong-Xing Huang, Yang Liu, Xiao-Yang Liu, Hua-Nan Li, Robert K.Y. Li