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Manipulating the Properties of Poly(1,4‐Cyclohexylenedimethylene Terephthalate) (PCT) Just by Tuning Steric Configuration of 1.4‐Cyclohexanedimethanol (CHDM)
Author(s) -
Wang Jinggang,
Liu Xiaoqing,
Zhu Jin
Publication year - 2018
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201800172
Subject(s) - steric effects , materials science , thermogravimetric analysis , glass transition , thermal stability , differential scanning calorimetry , polymer chemistry , melting temperature , chemical engineering , organic chemistry , thermodynamics , chemistry , composite material , polymer , physics , engineering
The properties of poly(1,4‐cyclohexylenedimethylene terephthalate) (PCT) are manipulated only by tuning the steric configuration of 1,4‐cyclohexanedimethanol (CHDM). The chemical structures and compositions of PCTs are confirmed by nuclear magnetic resonance ( 1 H NMR and 13 C NMR) before their thermal and mechanical properties are investigated by differential scanning calorimeter, thermogravimetric analyzer, and dynamic mechanical analysis. Results show that the ratio of cis ‐ to trans ‐CHDM in PCTs has significant influences on their properties. The melting temperature of PCTs is varied from 251 to 313 °C, and the glass transition temperature is increased from 73 to 92 °C when the content of trans ‐CHDM in PCTs is increased from 10% to 96%. In addition, the crystallizability of PCT is also increased with the content of trans ‐CHDM. However, its thermal stability is decreased seriously when the melting temperature of PCT is higher than 280 °C. It is concluded that when the content of trans‐ CHDM is lower than 50% (PCT‐10, PCT‐28, and PCT‐46), the balance of melting temperature, glass transition temperature, and thermal stability for PCT can be achieved. Just by varying the cis / trans ratio of CHDM, rather than the addition of other components, the properties of PCT can be manipulated.