STUDY ON CURING MECHANISM AND PROPERTIES OF FURAN/EPOXY/AMINE BLENDS

Abstract

Abstract: In this paper, a blend of furan/epoxy/amine blends was prepared by solution method. The processability, curing mechanism and mechanical properties of the cured blend were studied with rotational viscometer, differential scanning calorimetry (DSC), fourier transform infrared (FT-IR), scanning electrical machine (SEM) and mechanical test machine. The blends showed excellent processability. The viscosity of blends was low enough to satisfy the special requirements. With increasing the epoxy content in blends, the curing of blends was delaying. It was found that the polymerization reaction of furan and epoxy/amine was occurred at lower temperature (180 ℃) and then the residual epoxy need higher temperature (280 ℃) to cure. The two components had no co-reaction between them. The cured blends showed excellent flexural and impact properties and the properties improved with increasing the content of epoxy in blend. For flexural properties, the highest value of flexural strength was 113 MPa, flexural modulus was 4129 MPa. For impact strength, the highest one was 19.1 kJ/m². All modified system showed improved mechanical properties compared with the each component. The surface of sample after impact test was examined by SEM and possible improved reason was discussed. It was found that the micro-phase separation structure was showed in blends which may be caused by each component cured at different temperatures, and maybe the main reason for excellent impact properties.

Key words: curing mechanism, epoxy, furan, mechanical properties

CLC Number:

TB332

CAO Ni, WANG Zhi, DU Rui-kui, LIU Ya-qing. STUDY ON CURING MECHANISM AND PROPERTIES OF FURAN/EPOXY/AMINE BLENDS[J]. Fiber Reinforced Plastics/Composites, 2017, 0(4): 94-98.

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