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Phase separation behaviour in blends of isotactic polypropylene and ethylene— propylene diene terpolymer


Citation

Chen, C. Y. and Wan Yunus, Wan Md. Zin and Chiu, Hao Wen and Kyu, Thein (1997) Phase separation behaviour in blends of isotactic polypropylene and ethylene— propylene diene terpolymer. Polymer, 38 (17). pp. 4433-4438. ISSN 0032-3861

Abstract

Miscibility and phase separation behaviour in blends of isotactic polypropylene (iPP) and ethylene-propylene diene terpolymer (EPDM, ethylene content 70%) have been examined by means of depolarized light scattering, polarizing optical microscopy, differential scanning calorimetry and dynamic mechanical methods. A cloud point phase diagram was established by means of light scattering after eliminating the influence of iPP crystal melting on liquid-liquid phase separation of iPP/EPDM blends. A lower critical solution temperature (LCST) was observed above the crystallization temperature, but below the melting temperature of iPP. This LCST is thermally reversible, so long as crystallization does not occur in its vicinity. The coupling between the crystal melting and liquid-liquid phase separation has been examined. Crystallization-induced phase separation and morphology development during crystallization of iPP have been investigated.


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Additional Metadata

Item Type: Article
Divisions: Universiti Pertanian Malaysia
DOI Number: https://doi.org/10.1016/S0032-3861(96)01039-7
Publisher: Elsevier Science
Keywords: Crystallization; iPP/EPDM blends; LCST; Phase separation; Spinodal decomposition
Depositing User: Nabilah Mustapa
Date Deposited: 27 Apr 2017 10:08
Last Modified: 27 Apr 2017 10:08
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/S0032-3861(96)01039-7
URI: http://psasir.upm.edu.my/id/eprint/51092
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