Nihon Reoroji Gakkaishi
Online ISSN : 2186-4586
Print ISSN : 0387-1533
ISSN-L : 0387-1533
ORIGINAL ARTICLES
The Effect of Interfacial Polysilane Coating on Heat Fusion Properties of Polypropylene
Katsuhisa TokumitsuAsuka HayashiSakiko FukunishiKazuhumi KohnoMasami Okamoto
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2018 Volume 46 Issue 3 Pages 123-130

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Abstract

We investigate the effect of an interfacial phenyl-methyl polysilane (PMPS) coating on the heat-fusion properties of polypropylene (PP). Application of PMPS to the heat-fusion interface of PP films increases the peeling strength such that modified films cannot be peeled off, unlike PP films without PMPS under identical conditions. Therefore, modified films can be heat-fused at a much lower temperature than neat samples. Upon addition of silicone oil of nearly the same molecular weight as PMPS to the surface of PP films, the peeling strength decreases dramatically Field emission transmission electron microscopy results show a discontinuous heat-fusion boundary in the neat PP sample, even when the sample is completely heat-fused. However, when PMPS is applied to PP film surfaces, the boundary at the heat-fusion interface is barely observable; instead, continuous lamella crystals are observed at the interface. Viscoelastic measurements of PP films with added PMPS record an activation energy of 30.9 kJ mol−1 for the molecular motion of PP in the heat-flow region, which is lower than that of neat PP (34.9 kJ mol−1). This result indicates that PMPS enhances the molecular motion of PP in the molten state.

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© 2018 The Society of Rheology, Japan
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