Thermodynamics of Aromatic Cyclic Ester Polymerization in Bulk
Thermodynamics of Aromatic Cyclic Ester Polymerization in Bulk
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芳香环酯本体聚合热力学
DOI:
10.1007/s10118-018-2161-4
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发表时间:
2018-06
影响因子:
4.3
通讯作者:
Tu Ying Feng
中科院分区:
文献类型:
--
作者:
He Chong;Zhu Xiang;Li Xiao Hong;Yang Xiao Ming;Tu Ying Feng
We present here the thermodynamic investigation ofin situcascade 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 onβ-position of propandiol segments.
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影响因子:
5.5
作者:
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通讯作者:
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影响因子:
3.9
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5.5
作者:
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通讯作者:
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影响因子:
3.9
作者:
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通讯作者:
L. Conzatti;R. Utzeri;P. Hodge;P. Stagnaro
影响因子:
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通讯作者:
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