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The influence of EB‐crosslinking on barrier properties of HDPE–mica composites
Author(s) -
Södergård Anders,
Ekman Kenneth,
Stenlund Bengt,
Lassas AnnCatherine
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(19960314)59:11<1709::aid-app6>3.0.co;2-s
Subject(s) - ultimate tensile strength , materials science , high density polyethylene , mica , composite material , composite number , polymer , polyethylene , izod impact strength test , young's modulus , compounding , permeability (electromagnetism) , chemistry , membrane , biochemistry
High‐density polyethylene (HDPE) was compounded with untreated and surface‐treated mica (10, 20, 40 wt %) and composites were injection‐molded. The composites were radiation crosslinked (100, 300, 700 kGy) and hydrocarbon permeability, tensile impact strength, and tensile strength at 25 and 80°C of the composites were examined. The permeability of HDPE decreased from 7 to 3.6 g/(d × m 2 ) by compounding the polymer with 20 wt % mica, and the permeability was additionally reduced to 1.3 g/(d × m 2 ) by irradiation of the compounds (700 kGy). When surface‐treated mica was used, the permeability of the composite furthermore decreased to about 1.0 g/(d × m 2 ). Upon irradiation, the E modulus measured at 25°C increased 5% when the dose was 300 kGy. At 80°C, the corresponding increase was 40%. The tensile impact strength of an unfilled polymer increased more than three times by an irradiation dose of 700 kGy, and for a polymer with 10 wt % mica, the tensile impact strength was twice the level of an unirradiated composite. © 1996 John Wiley & Sons, Inc.