Thermal properties and phase structure of PP + oligopinene blends

Blends of polypropylene (PP) and β-oligo-pinene, a synthetic low molar mass resin, were prepared by melt mixing in a Haake Rheocord at 473 K, 30 rpm during 600 s. The influence of the terpenic resin on the thermal properties, phase structure and crystallization of PP was evaluated. The DSC results i...

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Bibliographic Details
Published in:Materials research innovations 2001-04, Vol.4 (5-6), p.360-364
Main Authors: Mendes, Luis C., Martins, Barbara B.B., Dias, Marcos L., Chagas, Beatriz S.
Format: Article
Language:English
Subjects:
Applied sciences
Crystallization
Exact sciences and technology
Morphology
Oligopinene
Organic polymers
Phase structure
Physicochemistry of polymers
Properties and characterization
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Summary:Blends of polypropylene (PP) and β-oligo-pinene, a synthetic low molar mass resin, were prepared by melt mixing in a Haake Rheocord at 473 K, 30 rpm during 600 s. The influence of the terpenic resin on the thermal properties, phase structure and crystallization of PP was evaluated. The DSC results indicated the presence of phase separation. The SEM analysis shows that the oligopinene was extracted along the whole surface and it was observed entities as cut cylinder atributted to low molar mass PP. The isothermal crystallization of blends was conducted at 396, 398 and 403 K. The mixtures did not show phase separation in molten, during crystallization and after solidification. The spherulite radial growth rate of PP decreased and was dependent on the temperature and composition. The results indicated that the system is an immiscible blend with at least three phases: a fine dispersion of the oligopinene in the amorphous PP, some boundary solubility of PP in oligopinene and a crystalline PP.
ISSN:1432-8917
1433-075X
DOI:10.1007/s100190000120