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Crystallization of polypropylene in the presence of a rigid and flexible additive
Author(s) -
Prakashan K.,
Gupta A. K.,
Maiti S. N.
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27751
Subject(s) - crystallization , nucleation , polypropylene , materials science , differential scanning calorimetry , polydimethylsiloxane , activation energy , elastomer , chemical engineering , polymer chemistry , composite material , chemistry , organic chemistry , thermodynamics , physics , engineering
The effect of a rigid additive (nano‐SiO 2 filler) and a flexible additive [poly(dimethylsiloxane) elastomer] on the crystallization of polypropylene was studied under nonisothermal conditions with differential scanning calorimetry. Crystallization parameters were evaluated with standard equations, and the results were interpreted on the basis of the rate of nucleation, crystallization, and activation energy of crystallization. The observed effect of polydimethylsiloxane of increasing the crystallization rate and lowering the activation energy of crystallization was attributed to the effect of polydimethylsiloxane chain mobility at the interface, which facilitated the molecular mobility of polypropylene. Nano‐SiO 2 , on the other hand, acted as a nucleating agent, and the nucleation effect was dependent on the cooling rate. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008