Interlocking shish-kebab morphology in polybutene-1
Date
2002Source Title
Journal of Polymer Science, Part B: Polymer Physics
Print ISSN
0887-6266
Publisher
John Wiley & Sons, Inc.
Volume
40
Issue
17
Pages
1828 - 1834
Language
English
Type
ArticleItem Usage Stats
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Abstract
The aim of this research was to explore the effect of shear-controlled orientation injection molding (SCORIM) on polybutene-1 (PB-1). This article describes the methods and processing conditions used for injection molding and discusses the properties of the moldings. Both conventional and SCORIM have been used for the production of moldings. SCORIM is based on the application of specific macroscopic shears to a solidifying melt that facilitates enhanced molecular alignment. The effect of the process was investigated by performing mechanical tests, X-ray studies, differential scanning calorimetric studies, polarized light microscopy, and atomic force microscopy (AFM). Moldings exhibited an improved mechanical performance as compared with conventional moldings. Young's modulus was increased over twofold, and the impact energy was enhanced by 60%. The improvement in mechanical performance was combined with an increase in crystallinity and enhanced molecular orientation. The application of SCORIM also favored the formation of the stable Form I' in PB-1. The formation of interlocking shish-kebab morphology following the application of SCORIM was observed in the AFM studies. Relationships between the mechanical properties of PB-1 and the micromorphologies formed during processing are demonstrated.
Keywords
Injection moldingOrientation
Poly(1 - butene)
Polybutene - 1
Structure-property relations
Aging of materials
Atomic force microscopy
Crystal microstructure
Crystallization
Differential scanning calorimetry
Elastic moduli
Mechanical testing
Molecular orientation
Molecular weight
Morphology
Physical properties
Crystallinity
Impact energy
Polarized light microscopy
Shear - controlled orientation injection molding
Shish - kebab morphology
X ray studies
Polybutenes