Shear-induced crystallization of polypropylene. Growth enhancement and rheology in the crystallization range

Crystallization under shear of many different polypropylenes has been studied using a fiber pull‐out device. It appears that growth can be considerably enhanced by flow. The best correlation is obtained with weight average molecular weight. Modeling the flow pattern gives access to the mechanical pa...

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Bibliographic Details
Published inMacromolecular symposia. Vol. 185; no. 1; pp. 119 - 133
Main Authors Haudin, Jean-Marc, Duplay, Catherine, Monasse, Bernard, Costa, Jean-Louis
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 01.08.2002
WILEY‐VCH Verlag
Wiley-VCH Verlag
Subjects
Crystallization
Engineering Sciences
Materials
Mathematical models
Molecular weight
Polypropylenes
Shear rate
Shear stress
Strain
Stress relaxation
crystallization
polypropylene
rheology
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Summary:Crystallization under shear of many different polypropylenes has been studied using a fiber pull‐out device. It appears that growth can be considerably enhanced by flow. The best correlation is obtained with weight average molecular weight. Modeling the flow pattern gives access to the mechanical parameters at the growth front (shear rate and shear stress) as well as to the total strain applied to the polymer. The residual strain can be calculated taking into account relaxation processes.
Bibliography:ark:/67375/WNG-J0CJ0CFF-B
ArticleID:MASY119
istex:C9F9E2E61E61E43C1BA1856E78C888146CBB4948
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1022-1360
1521-3900
DOI:10.1002/1521-3900(200208)185:1<119::AID-MASY119>3.0.CO;2-K