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Morphology and properties of HDPE/zinc‐neutralized sulfonated EPDM blends
Author(s) -
Xu Xi,
Zeng Xiangsheng,
Li Huilin
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070441219
Subject(s) - materials science , micrography , high density polyethylene , differential scanning calorimetry , composite material , scanning electron microscope , ultimate tensile strength , izod impact strength test , polyethylene , polymer blend , shear rate , rheometer , polymer chemistry , polymer , viscosity , rheology , copolymer , physics , thermodynamics
The compatibility of zinc‐neutralized sulfonated EPDM (Zn‐SEPDM) and its effect on crystallizing behavior of high‐density polyethylene (HDPE) as well as the morphology of the blend were studied through wide‐angle X‐ray diffractomer (WAXD), differential scannign calorimetry (DSC), transition electron micrography.(TEM), scanning electron micrography (SEM), a capillary rheometer, and mechanical property test. The results show that addition of Zn‐SEPDM decreases both the melting point and the crystallizing temperature of HDPE. The apparent viscosity of the blend decreases with increasing of shear rate and stress. As Zn‐SEPDM content exceeds 20%, Zn‐SEPDM in the blend becomes continuous and an abrupt change in impact strength occurs. Owing to the incorporation of ionic groups into EPDM, the strong interaction between the chains make the impact strength of HDPE incredibly increased without sacrificing much of its tensile strength.