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Discrepancy in determination of χ parameters by melting point depression versus small‐angle neutron scattering in blends of deuterated polycarbonate and isotactic poly(methyl methacrylate)
Author(s) -
Kyu Thein,
Matkar Rushikesh A.,
Lim Dong Soo,
Ko Chechian
Publication year - 2007
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889806054999
Subject(s) - tacticity , polycarbonate , melting point depression , materials science , crystal (programming language) , amorphous solid , deuterium , neutron scattering , poly(methyl methacrylate) , melting point , methyl methacrylate , scattering , solvent , polymer chemistry , methacrylate , polymer , crystallography , optics , organic chemistry , chemistry , composite material , physics , nuclear physics , monomer , polymerization , copolymer , computer science , programming language
The discrepancy in the χ interaction parameters of deuterated polycarbonate/isotactic poly(methyl methacrylate) blends as determined by the melting point depression approach and the small‐angle scattering technique is reported. We have modified the Flory diluent theory by removing the inherent assumption of complete rejection of the solvent from the crystal solid by taking into consideration the crystal–amorphous, amorphous–crystal, and crystal–crystal interactions. The discrepancy in χ values obtained by the two methods is discussed.