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Citation: Bian Xinsheng, Chen Zhongxiao, Zhang Qingyu, Zhang Zhenqian. LIQUID CHLOROPRENE-HYDROXYETHYL METHACRYLATE COPOLYMER MODIFIED EPOXY RESIN——N,N-DIMETHYL BENZYL AMINE CURING SYSTEM[J]. Chinese Journal of Applied Chemistry, ;1987, 4(2): 1-4. shu

LIQUID CHLOROPRENE-HYDROXYETHYL METHACRYLATE COPOLYMER MODIFIED EPOXY RESIN——N,N-DIMETHYL BENZYL AMINE CURING SYSTEM

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Corresponding author: Bian Xinsheng,
Received Date: 20 September 1985
Available Online: 1 April 1986

A number of thermosets of liquid chloroprene-hydroxyethyl methacrylate copolymer (CP-co-HEMA) modified epoxy resin were prepared. The mechanical properties of the resin were improved after modification. The shear strength of the modified system began to drop when CP-co-HEMA content is more than 30%. The data of the experiments carried out by monitoring with IR and Curelastometer indicatad that during the curing the etheri fication of primary hydroxyl groups of CP-co-HEMA with epoxy groups and the self-polymerization of epoxy groups occur simultaneously and the etherification appeared to bring about an improvement in the mechanical properties of the thermosets thus obtained. The effects of the curing conditions and CP-co-HEMA content on morphology were studied.It was found that high temperature is in favour of microphase separation and when the curing temperature is low thermodynamic diffusion of the system is a dominant factor.
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