39.The toughening of polymeric glasses using cellulose without sacrificing transparency
作者：Yaqiong Zhang, Wei Liu, Weiqi Huang, Yongliang Ding, Lingzhi Song, Suhua Zheng, Zhongkai Wang*
关键字：Cellulose Poly(methyl methacrylate), Graft copolymers, High toughness, High transparency
论文来源：期刊
具体来源：Industrial Crops & Products
发表时间：2019年
The development of cellulose graft copolymers has been intensively studied during recent years. Our previous works have demonstrated that cellulose graft strategy can greatly improve the mechanical properties of ther- moplastic elastomers. However, the effect of cellulose graft strategy on glassy polymers is still unknown. Herein, Cellulose-graft-poly(methyl methacrylate) (Cell-g-PMMA) copolymers were synthesized by activators regenerate by electron transfer atom transfer radical polymerization (ARGET ATRP). Two kinds of celluloses, micro- crystalline cellulose (MCC) and wood pulp cellulose (Pulp) were used as starting materials. Thermal behavior, transparency, and mechanical properties of these graft copolymers were investigated. Compared with the brittle fracture of PMMA, a typical ductile fracture was observed in both MCC-g-PMMA and Pulp-g-PMMA copolymers, which showed similar transparency as linear PMMA film. The tensile toughness of MCC-g-PMMA copolymers was almost 7 times to that of linear PMMA. Furthermore, the toughness of Pulp-g-PMMA copolymers was even better than that of MCC-g-PMMA copolymers.