Transitions and relaxations of linear polyesters related to poly(ethylene terephthalate). I. Melting | Zendy

Yip Harry K. | Zendy; Williams H. Leverne | Zendy

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Transitions and relaxations of linear polyesters related to poly(ethylene terephthalate). I. Melting

Author(s) -

Yip Harry K.,

Williams H. Leverne

Publication year - 1976

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.1976.070200507

Subject(s) - crystallinity , enthalpy of fusion , methylene , polyester , materials science , poly ethylene , ethylene , polymer chemistry , fusion , melting temperature , melting point , thermodynamics , crystallography , composite material , organic chemistry , chemistry , physics , linguistics , philosophy , catalysis

Observations obtained by other techniques were confirmed by DSC analyses. As the length of the methylene chain increased, T m decreased, and crystallinity, heat capacity, and heat of fusion increased. The T m and crystallinity of the isophthalate esters were lower than for the corresponding terephthalate esters. The values for an odd‐numbered methylene sequence were lower than for the adjacent even‐numbered members. A model was used to calculate the heat of fusion of theoretically 100% crystalline poly(hexamethylene isophthalate) and poly(decamethylene isophthalate).

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