Premium
Selective crosslinking reaction in polymer blends. IV. The effects on the impact behavior of PP/EPDM blends (2)
Author(s) -
Inoue Toshio,
Suzuki Tokuhito
Publication year - 1996
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/(sici)1097-4628(19960228)59:9<1443::aid-app12>3.0.co;2-#
Subject(s) - materials science , polymer blend , composite material , epdm rubber , polymer , polymer science , copolymer , chemical engineering , polymer chemistry , natural rubber , engineering
Two PP/EPDM blends with 30 wt % of EPDM and different morphologies were selectively crosslinked under a dynamic crosslinking reaction using the N,N'‐m ‐phenylene‐ bis maleimide/poly(2,2,4‐trimethyl‐1,2,‐dihydroquinoline) system. The resulting Izod impact strengths (IISs) were measured over a range of temperature. A transition point in the IIS curve, which is considered to dependent on the glass transition temperature ( T g ) of the PP matrix, appeared to decrease by 5°C. Scanning electron microscopy (SEM) confirmed that the crosslink reaction did not affect the blends' morphology but did increase interfacial adhesion. Increased adhesion is considered to be a most important factor for shifting of the transition point, or apparent T g , because it increases the free volume of the PP matrix under deformation. © 1996 John Wiley & Sons, Inc.