

FOLLOWUS
Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
tuyingfeng@suda.edu.cn
Received:19 April 2018,
Revised:2018-5-11,
Accepted:19 May 2018,
Online First:14 June 2018,
Published:2019-01
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Citation: He, C.; Zhu, X.; Li, X. H.; Yang, X. M.; Tu, Y. F. Thermodynamics of aromatic cyclic ester polymerization in bulk. Chinese J. Polym. Sci. 2019, 37, 89–93
Chong He, Xiang Zhu, Xiao-Hong Li, et al. Thermodynamics of Aromatic Cyclic Ester Polymerization in Bulk[J]. Chinese Journal of Polymer Science, 2019, 37(1): 89-93.
Citation: He, C.; Zhu, X.; Li, X. H.; Yang, X. M.; Tu, Y. F. Thermodynamics of aromatic cyclic ester polymerization in bulk. Chinese J. Polym. Sci. 2019, 37, 89–93 DOI: 10.1007/s10118-018-2161-4.
Chong He, Xiang Zhu, Xiao-Hong Li, et al. Thermodynamics of Aromatic Cyclic Ester Polymerization in Bulk[J]. Chinese Journal of Polymer Science, 2019, 37(1): 89-93. DOI: 10.1007/s10118-018-2161-4.
We present here the thermodynamic investigation of
in situ
cascade polycondensation-coupling ring-opening polymerization (PROP) for three cyclic aromatic ester monomers
i.e.
cyclic oligo(2-methyl-1
3-propylene terephthalate)s (COMPTs)
cyclic oligo(neopentylene terephthalate)s (CONTs) and cyclic oligo(2-methyl-2-propyl-1
3-propylene terephthalate)s (COMPPTs). The equibrium monomer to polymer weight ratio in bulk at different polymerization temperatures for each monomer was estimated by the size exclusion chromatography (SEC)
and the thermodynamic parameters were estimated by Dainton equation. Quite different from the thermodynamics of aliphatic lactones polymerization
which is an exothermic process with entropy reduction
our results showed the polymerization thermodynamics for three cyclic aromatic ester monomers was a weak exothermic process with slight entropy increment
i.e.
a both enthalpy and entropy driving process. Among them
CONTs showed the largest value of enthalpy change
due to its symmetric dimethyl substitution on
β
-position of propandiol segments.
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