Properties of ethylene–propylene copolymer/PA-1010 blends using ethylene–propylene copolymer-graft-acrylic acid as a compatibilizing agent

✍ Scribed by Zhang Xiaomin; Whang Dongmei; Yin Zhihui; Yin Jinghua

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 926 KB
• Volume: 62
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19961003)62:1<67::aid-app9>3.0.co;2-q

✦ Synopsis

SYNOPSIS

T h e modification of ethylene-propylene copolymer (EP) has been accomplished by radical initiators. T h e resulting EP-graft-acrylic acid (EP-g-AA) has been used to obtain ternary PA/EP/EP-g-AA blends by melt mixing. Different blend morphologies were observed by scanning electron microscopy; the domain size of the EP-dispersed phase in the polyamide 1010 matrix of compatibilized blends decreased compared with that of' uncompatibilized blends. It is found that EP-g-AA used as the third component has a profound eff'ect on the mechanical properties of the resulting blends. This behavior has been attributed t o serious chemical interactions taking place between the two components. Thermal analysis shows that some thermal properties of PA in compatibilized PA/EP/EP-g-AA changed because of chemical reactions taken place during the blending process. Wide angle x-ray diffraction measurements also confirmed this result.