Citation: Chong He, Xiang Zhu, Xiao-Hong Li, Xiao-Ming Yang, Ying-Feng Tu. 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 shu

Thermodynamics of Aromatic Cyclic Ester Polymerization in Bulk

Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

Corresponding author: Ying-Feng Tu, tuyingfeng@suda.edu.cn
Received Date: 19 April 2018
Revised Date: 11 May 2018
Accepted Date: 19 May 2018
Available Online: 14 June 2018

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.
- Lactone,
- Polyester,
- Polycondensation-coupling ring-opening polymerization,
- Thermodynamic parameters
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