Effect of the structure of ethylene-propylene-diene-graft-polystyrene graft copolymers on morphology and mechanical properties of SAN/EPDM blends | Zendy

Anita Ptiček Siročić | Zendy; Zlata HrnjakMurgić | Zendy; Jasenka Jelenčić | Zendy

Open Access

Effect of the structure of ethylene-propylene-diene-graft-polystyrene graft copolymers on morphology and mechanical properties of SAN/EPDM blends

Author(s) -

Anita Ptiček Siročić,

Zlata HrnjakMurgić,

Jasenka Jelenčić

Publication year - 2007

Publication title -

express polymer letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.695

H-Index - 72

ISSN - 1788-618X

DOI - 10.3144/expresspolymlett.2007.27

Subject(s) - copolymer , materials science , miscibility , fourier transform infrared spectroscopy , polystyrene , morphology (biology) , thermoplastic elastomer , ethylene propylene rubber , ethylene , epdm rubber , ultimate tensile strength , styrene , polymer chemistry , composite material , chemical engineering , polymer , natural rubber , organic chemistry , catalysis , chemistry , biology , genetics , engineering

Ethylene-propylene-diene-graft-polystyrene (EPDM-g-PS) copolymers were synthesized to obtain different structures of graft copolymers with different graft lengths and graft densities. The structure of synthesized EPDM-g-PS copolymers was characterized by gel permeation chromatography (GPC) and by Fourier transforms infrared spectroscopy (FTIR). These presynthesized graft copolymers were added (5 phr) to styrene-acrylonitrile (SAN) and ethylene-propylene-diene (EPDM) blends, prepared to maintain the following SAN/EPDM ratios a) 95/5 and b) 90/10. SAN/EPDM blends were characterized by the determination of mechanical properties (tensile strength, elongation at break) while their morphology was inspected by scanning electronic microscopy, SEM. The obtained results show that various structures of EPDM-g-PS copolymers influence the miscibility in SAN/EPDM blends. Optimal concentration of side branches of graft copolymers provide the finest morphology and enhance mechanical properties

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