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Dynamic mechanical properties of poly(2,6‐dimethyl‐1,4‐phenylene ether)‐polystyrene blends
Author(s) -
Stoelting J.,
Karasz F. E.,
Macknight W. J.
Publication year - 1970
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760100302
Subject(s) - materials science , glass transition , polystyrene , phenylene , dynamic mechanical analysis , ether , polymer , dimethyl ether , polymer chemistry , chemical engineering , phase (matter) , composite material , organic chemistry , methanol , chemistry , engineering
Blends of poly(2,6‐dimethyl‐1,4‐phenylene ether) (PPO) and atactic polystyrene (PS) have been prepared by mechanically mixing powders of the two polymers and subjecting the mixtures to three different thermal treatments. Three different compositions were studied by the dynamic mechanical and DSC techniques. The weight fractions of PPO in the mixtures were 0.25, 0.50 and 0.75. The dynamic mechanical measurements indicate that partial mixing took place but that two distinct phases, one rich in PS and the other in PPO, exist in all the mixtures studied. Each phase exhibits a characteristic relaxation peak associated with the glass transition of that phase. DSC measurements, on the other hand, reveal only a single glass transition apparently characteristic of the PS rich phase in each case. The results indicate that a given type of experiment will indicate compatibility or incompatibility depending upon the size of the molecular process it represents.