INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN

Li-ming Tang~() Ji Feng Yu Wang Advanced Materials Laboratory; Department of Chemical Engineering; Tsinghua University; Beijing 100084; China

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INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN

Updated：2021-06-21

- INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN
- INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN
- 高分子科学（英文版） 2007年第6期页码：545-553
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  The work was financially supported by the National Science Foundation of China（Nos.20204005,50233030）.()
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Li-ming Tang~() Ji Feng Yu Wang Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, 等. INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN[J]. 高分子科学（英文版）, 2007,(6):545-553.

Li-ming Tang~() Ji Feng Yu Wang Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, et al. INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN[J]. 2007,(6):545-553.
Li-ming Tang~() Ji Feng Yu Wang Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, 等. INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN[J]. 高分子科学（英文版）, 2007,(6):545-553. DOI：

Li-ming Tang~() Ji Feng Yu Wang Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, et al. INFLUENCE OF MOLECULAR STRUCTURES OF SECONDARY AMINE TERMINATED POLY（ESTER-AMINE）S ON THE CURING PERFORMANCE WITH EPOXY RESIN[J]. 2007,(6):545-553. DOI：

摘要

<,正,>,Five secondary amine terminated poly（ester-amine）s（defined as PEA）with controlled molecular structures were synthesized through reacting excessive piperazine with phthalicdiglycol diacrylate（PDDA）and 1,1,1-trimethylolpropane triacrylate（TMPTA）at a constant secondary amine/acrylate group ratio of 1.5/1 and at different PDDA/TMPTA molar ratios. Both IR and,?,H-NMR spectra indicated that all acrylate groups were consumed in the reaction,based on which the structural parameters were calculated from the ,?,H-NMR spectra.With decreasing PDDA/TMPTA ratio,the content of secondary amine,degree of branching,molecular weight,T,g, and T,d, increased accordingly.These polymers were further used as both crosslinkers and flexibilizers for a linear epoxy resin E51 to form cured films under ambient condition.The gel content, relative hardness and T,g, of the resulting films increased as PEA molecules changed from linear to highly branching structures.Due to the flexibility of PEA molecules,all the films possessed excellent mechanical performance.

Abstract

Five secondary amine terminated poly（ester-amine）s（defined as PEA）with controlled molecular structures were synthesized through reacting excessive piperazine with phthalicdiglycol diacrylate（PDDA）and 1,1,1-trimethylolpropane triacrylate（TMPTA）at a constant secondary amine/acrylate group ratio of 1.5/1 and at different PDDA/TMPTA molar ratios. Both IR and ,?,H-NMR spectra indicated that all acrylate groups were consumed in the reaction,based on which the structural parameters were calculated from the ,?,H-NMR spectra.With decreasing PDDA/TMPTA ratio,the content of secondary amine,degree of branching,molecular weight,T,g, and T,d, increased accordingly.These polymers were further used as both crosslinkers and flexibilizers for a linear epoxy resin E51 to form cured films under ambient condition.The gel content, relative hardness and T,g, of the resulting films increased as PEA molecules changed from linear to highly branching structures.Due to the flexibility of PEA molecules,all the films possessed excellent mechanical performance.

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