Premium
Thermal behavior and tensile properties of poly(ethylene terephthalate‐ co ‐ethylene isophthalate)
Author(s) -
Karayannidis George P.,
Sideridou Irini D.,
Zamboulis Demetris N.,
Bikiaris Demetris N.,
Sakalis Anastasios J.
Publication year - 2000
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 - 10.1002/1097-4628(20001003)78:1<200::aid-app240>3.0.co;2-r
Subject(s) - copolymer , materials science , differential scanning calorimetry , ethylene , crystallization , polymer chemistry , monomer , dimethyl terephthalate , glass transition , ethylene glycol , condensation polymer , ultimate tensile strength , chemical engineering , polymer , composite material , polyester , organic chemistry , chemistry , catalysis , physics , engineering , thermodynamics
Poly(ethylene terephthalate) (PET) and poly(ethylene isophthalate) (PEI) homopolymers were synthesized by the two‐step melt polycondensation process of ethylene glycol (EG) with dimethyl terephthalate (DMT) and/or dimethyl isophthalate (DMI), respectively. Nine copolymers of the above three monomers were also synthesized by varying the mole percent of DMI with respect to DMT in the initial monomer feed. The thermal behavior was investigated over the entire range of copolymer composition by differential scanning calorimetry (DSC). The glass transition ( T g ), cold crystallization ( T cc ), melting ( T m ), and crystallization ( T c ) temperatures have been determined. Also, the gradually increasing proportion of ethyleno‐isophthalate units in the virgin PET drastically differentiated the tensile mechanical properties, which were determined, and the results are discussed. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 200–207, 2000