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Thermal behavior of nylon 6 copolyamides containing aromatic rings
Author(s) -
Ajroldi G.,
Stea G.,
Mattiussi A.,
Fumagalli M.
Publication year - 1973
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.1973.070171020
Subject(s) - glass transition , caprolactam , monomer , polymer chemistry , ternary operation , materials science , crystallization , amorphous solid , copolymer , thermodynamics , polymer , nylon 6 , differential thermal analysis , thermal , crystallography , chemistry , composite material , physics , computer science , programming language , diffraction , optics
The thermal behavior of terpolymers of caprolactam (CL) and of hexamethylenediammonium isophthalate (IH) and terephthalate (TH) has been studied in a wide range of compositions by differential thermal analysis. It has been found that either amorphous or crystalline polymers having different crystallization rates can be obtained by changing the composition. The dependence of melting points and glass transition temperatures on the composition has been investigated. The dependence of T g on the composition for the copolymers CL–IH, IH–TH, and CL–TH has been described by means of the Gordon‐Taylor equation. It has been found that this equation fits the experimental data for the IH–TH system only if a parameter which takes into account interactions between the monomeric units is introduced. A ternary iso‐ T g map has been obtained through statistical analysis. The influence of the chain stiffness and bulkiness of the monomers on the glass transition temperature is discussed.