Thermophysical characterization of the deformation behavior of polyethylene/kaolin composites
作者:
V.P. Privalko,
F.J. Baltá-calleja,
D.I. Sukhorukov,
E.G. Privalko,
R. Walter,
K. Friedrich,
期刊:
Journal of Macromolecular Science, Part B
(Taylor Available online 1999)
卷期:
Volume 38,
issue 5-6
页码: 931-943
ISSN:0022-2348
年代: 1999
DOI:10.1080/00222349908248149
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The deformation behavior at room temperature of injection-molded and blow-molded samples of high-density polyethylene (HDPE) differing in orientation (with respect to the melt flow direction) and in filler content (untreated and surface-treated kaolin, respectively) were characterized by the stretching calorimetry technique. Samples with longitudinal and transversal orientations were examined. Strain-softening and strain-hardening phenomena were observed, respectively, in the range of inelastic strains above the yield point. The depression of yield stresses for the filled composites compared to those for the corresponding neat polymers is associated with the onset of debonding of the matrix polymer from the filler surface. The analysis of the energy balance of the debonding process suggests that the fraction of a debonded interface is smaller in samples containing a coupling agent and larger filler particles.
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