Microphase Separation Structure Formed in GMA/St Multi-monomer Melt Grafted Polypropylene

Abstract

Abstract: The glycidyl methacrylate(GMA) and styrene(St) multi-monomer grafted polypropylene(PP),PP-g-(GMA-co-St),with various grafting degrees were prepared by melt-grafting process. The homo-PP and ethylene-co-polypropylene with different contents of ethylene were chosen to be backbone PP for the grafting process. After purification,PP-g-(GMA-co-St) was stained by RuO₄,and its microphase morphology was observed by Transmission Electron Microscope(TEM). The microphase separation morphology, i.e . spherical long-range order structure was found in the grafted PP. Such nano-structure morphology formed in melt-grafted polymer was unique and original. The effects of E block fractions in EP copolymer and grafting degree on the microphase morphology were discussed. This study indicated that even in the melt grafting system,where molecular weight and molecular architecture are both multi-dispersed,copolymers with long grafts could also be separated in a microphase into long-range order structures.

Key words: Microphase separation, Polypropylene, Multi-monomer melt graft

CLC Number:

O631

TrendMD:

CHEN Bin, ZHANG Jing-Chun, XIE Xu-Ming . Microphase Separation Structure Formed in GMA/St Multi-monomer Melt Grafted Polypropylene[J]. Chem. J. Chinese Universities, 2004, 25(8): 1572.

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Microphase Separation Structure Formed in GMA/St Multi-monomer Melt Grafted Polypropylene

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