Premium
Miscibility and crystallization behavior of poly(ethylene‐ co ‐vinylalcohol)/poly(maleic anhydride‐ alt ‐ethylene) blend
Author(s) -
Aouak Taieb,
AlArifi Abdullah Saad,
Ouladsmane Mohamed
Publication year - 2012
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.36470
Subject(s) - miscibility , maleic anhydride , crystallization , crystallinity , materials science , polymer chemistry , ethylene , chemical engineering , kinetics , activation energy , copolymer , chemistry , polymer , organic chemistry , composite material , catalysis , engineering , physics , quantum mechanics
The miscibility of poly(vinylalcohol‐ co ‐ethylene) (PEVA) with poly(ethylene‐ alt ‐maleic anhydride) (PEMAH) blends was investigated over a wide range of compositions by viscosimetry and DSC analyses using Krigbaum–Wall and Kwei approaches. The results revealed that the blends were completely miscible in all proportions due to the specific interactions between the hydroxyl groups of PEVA and the carbonyl groups of PEMAH. From Nishi equation, the interaction parameter of Flory was found to be −0.89. The nonisothermal crystallization behavior and kinetics of this system were also investigated and compared with those of the pure PEVA. There were strong dependencies of the degree of crystallinity ( X T ), peak crystallization temperature ( T p ), half time of crystallization ( t 1/ 2 ), and Ozawa exponent ( m ) on PEMAH content and cooling rate. The crystallization activation energy ( E c ) that was calculated from Kissinger model increased with increasing PEMAH composition in the blend. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012