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Linear low density polyethylene/cycloolefin copolymer blends

SYSNO ASEP	0354142
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Linear low density polyethylene/cycloolefin copolymer blends
Author(s)	Dorigato, A. (IT) Pegoretti, A. (IT) Fambri, L. (IT) Lonardi, C. (IT) Šlouf, Miroslav (UMCH-V)_{RID, ORCID} Kolařík, Jan (UMCH-V)
Source Title	Express Polymer Letters. - : Budapest University of Technology and Economics, Department of Polymer Engineering - ISSN 1788-618X Roč. 5, č. 1 (2011), s. 23-37
Number of pages	15 s.
Language	eng - English
Country	HU - Hungary
Keywords	polymer blends ; cycloolefin copolymer ; creep
Subject RIV	JI - Composite Materials
R&D Projects	GA106/09/1348 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z40500505 - UMCH-V (2005-2011)
UT WOS	000285648400003
DOI	10.3144/expresspolymlett.2011.4
Annotation	Linear low density polyethylene (LLDPE) was melt compounded with various amounts of a cycloolefin copolymer (COC). Electron micrographs, changes of LLDPE crystallinity and the shifts of COC glass transition temperature evidenced some interfacial adhesion between LLDPE and COC. This was tentatively explained by the incorporation of ethylene segments of COC into the LLDPE crystalline phase, leading to an increased number of norbornene units in the remaining COC component undergoing the glass transition. Increasing fraction of COC in the blends increased the elastic modulus and decreased the strain at break, while tensile strength passed through a minimum, in agreement with the model predictions based on the equivalent box model. The rising COC amount in the blends increased the maximum load sustained by the samples in impact tests, but decreased the blend ductility. Concurrently, a significant reduction of the creep compliance of LLDPE was observed for COC fractions higher than 20 wt%.
Workplace	Institute of Macromolecular Chemistry
Contact	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Year of Publishing	2011

Number of the records: 1