Heat Degradation of Poly(propylene) in Extruding Cycles
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- KITAMURA Mitsunobu
- Department of Materials Science, School of Engineering, The University of Shiga Prefecture
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- MIYAGAWA Eiichi
- North Eastern Industrial Research Center of Shiga Prefecture
Bibliographic Information
- Other Title
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- ポリプロピレンの成形加工時における熱劣化
- ポリプロピレン ノ セイケイ カコウジ ニ オケル ネツ レッカ
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Abstract
Poly(propylene) samples were reprocessed in multiple cycles by a single-screw extruder. The heat degraded samples reprocessed were characterized by dynamic viscoelasticity and stress-strain measurement.<br>The decrease (Mw/Mw0) in molecular weight of poly(propylene) with reprocessing was expressed by the product (f(n, T)·g(t, T)) of a function of cycles number (n) of extrusion consisting of virgin and degraded samples and a function of time (t) required in extrusion at a given temperature (T). Especially, at a temperature below 190°C, Mw/Mw0 was expressed only by f(n, T). In blend system Mw/Mw0 was expressed by similar relationship, suggesting that the synergy effect of blend on the heat degradation was absent. Young’s modulus (E) and yield stress (σy) obtained from stress-strain curves did not change regardless of the virgin, heat degraded and blend samples.
Journal
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- Resources Processing
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Resources Processing 51 (2), 77-82, 2004
The Resources Processing Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680184820224
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- NII Article ID
- 130000103638
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- NII Book ID
- AA11907992
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- ISSN
- 13499262
- 13486012
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- NDL BIB ID
- 6980451
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed