Morphology and improved impact strength of cellulose acetate butyrate blended with polyethylene copolymer

eXPRESS Polymer Letters

A. Podshivalov¹ 

关键词: polymer blends and alloys;    cellulose acetate butyrate;    polyethylene copolymer;    blend morphology;    impact properties;   

DOI  :  10.3144/expresspolymlett.2018.74

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

Incompatible blends of cellulose acetate butyrate (CAB) and copolymer of ethylene, acrylic ester, and maleic anhydride(PE-Acr-MA) with a component ratio 70/30 vol% were prepared by melt extrusion at the rates of 150 and 500 rpm.The goal was to modify weak impact properties of CAB. We showed that at a speed of 500 rpm, both small individual(0.9 μm in diameter) and large coalesced (2.3 μm in diameter) particles of the PE-Acr-MA phase were formed; the impactstrength of the blend increased in 6.5 times as compared with that of pure CAB. However, at a melt mixing rate of 150 rpm,the size of the individual PE-Acr-MA particles decreased in 3.8 times, whereas that of the coalesced particles diminished by6.6 times; the impact strength of the blend increased in about 40 times as compared with that of pure CAB and reached thevalues around and higher than 70 kJ/m2. The effect of the screw rotating speed on viscoelastic properties of each componentand their viscosity ratio was analyzed and shown to control blend morphology and mechanical properties.

【 授权许可】

CC BY