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Phase behaviour and separation kinetics of polymer blends
Author(s) -
DAS N.C.
Publication year - 2014
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/jmi.12110
Subject(s) - nucleation , materials science , polypropylene , polyethylene , optical microscope , phase diagram , phase (matter) , kinetics , deuterium , polymer blend , polymer , chemical engineering , thermodynamics , composite material , scanning electron microscope , chemistry , organic chemistry , physics , quantum mechanics , engineering , copolymer
Summary The liquid–liquid phase separation kinetics and phase behaviour of hydrogenated polyethylene and deuterated polypropylene blends have been systematically studied by optical microscope. Phase diagram was constructed from the phase transition temperature. The hydrogenated polyethylene/deuterated polypropylene blend exhibits upper critical solution temperature in the melt. The time evolution of the characteristics morphology for liquid–liquid phase separation is determined for the hydrogenated polyethylene/deuterated polypropylene blend at various compositions and following a quench from initial homogenous melts at higher temperature to various lower temperatures. Liquid–liquid phase separation kinetics follows nucleation and growth mechanism. The experimental results from optical microscope measurement at various conditions are all consistent with the nucleation and growth mechanism.