Effect of Cryogenic Treatment on Micro-structure and Properties of Different Polymer MaterialsHongjun Ni, Lu Zhuo, Hai Gu, Shuaishuai Lv, Yu Zhu, Chongshi Shi and Xingxing WangMATEC Web of Conferences, 166 (2018) 01002DOI: https://doi.org/10.1051/matecconf/201816601002