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Reactive compatibilization of poly(styrene-ran-acrylonitrile)/poly(ethylene) blends through the acid-epoxy reaction
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SYSNO ASEP 0506758 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Reactive compatibilization of poly(styrene-ran-acrylonitrile)/poly(ethylene) blends through the acid-epoxy reaction Author(s) Gill, A. (CA)
Hong, C. (CA)
Gromadzki, Daniel (UFCH-W)
Marić, M. (CA)Article number 44178 Source Title Journal of Applied Polymer Science. - : Wiley - ISSN 0021-8995
Roč. 133, č. 44 (2016)Number of pages 12 s. Language eng - English Country US - United States Keywords nitroxide-mediated polymerization ; styrene-acrylonitrile copolymers ; glass-transition temperature ; block-copolymers ; interfacial-tension ; poly(methyl methacrylate) Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000383356200005 EID SCOPUS 84979752646 DOI 10.1002/app.44178 Annotation Two families of acid functional styrene/acrylonitrile copolymers (SAN) for application as dispersed phase barrier materials in poly(ethylene) (PE) were studied. One type is SAN made by nitroxide mediated polymerization (NMP), which was subsequently chain extended with a styrene/tert-butyl acrylate (S/tBA) mixture to provide a block copolymer (number average molecular weight M-n = 36.6 kg mol 21 and dispersity D = 1.34, after which the tert-butyl protecting groups were converted to acid groups (SAN-b-S/AA). The other acid functional SAN is made by conventional radical terpolymerization (SAN-AA). SAN-AA and SAN-b-S/AA were each melt blended with PE grafted with epoxy functional glycidyl methacrylate (PE-GMA) at 160 degrees C in a twin screw extruder (70: 30 wt % PE-GMA: SAN co/terpolymer). The non-reactive PE-g-GMA/SAN blend had a volume to surface area diameter D (vs) 53.0 mu m while the reactive blends (via epoxy/acid coupling) (PE-GMA/SAN-b-SAA and PE-GMA/SAN-AA) had D (vs) 51.7 mu m and 1.1 mu m, respectively. After thermal annealing, the non-reactive blend coarsened dramatically while the reactive blends showed little signs of coarsening, suggesting that the acid/epoxy coupling was effective for morphological stability. (C) 2016 Wiley Periodicals, Inc. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2020 Electronic address http://hdl.handle.net/11104/0297934
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