STUDY ON PROPERTIES OF PHENOLIC MODIFIED POLYARYLACETYLENE RESIN MATRIX COMPOSITES

Abstract

Abstract: Polyarylene acetylene (PAA) resin is an ideal substrate for ablative thermal protection composite materials because of its high carbon residue rate and low water absorbency. The PAA resin was modified by phenolic resin. The curing reaction characteristics and shrinkage characteristics of different resin systems were analyzed before and after the modification. Composite laminates were made with different fiber/resin systems. The bending and interlaminar shear properties of laminates were tested, and the cross section and the fracture appearance of different system laminates were compared. The results show that the mechanical properties of the laminates made of PAA resin modified by phenolic resin are obviously improved, and the defects in the laminates are obviously reduced. After the modification of the phenolic resin, the curing shrinkage of the PAA resin is reduced and the surface tension of the PAA resin is reduced. In the curing process, the phenolic resin and the PAA resin are prepolymerized. These properties and the change of curing properties can reduce the defects of the laminate.

Key words: polyarylacetylene resin, composites, phenolic modification, crack defect

CLC Number:

TB332

MIAO Chun-hui, ZHAI Quan-sheng, YE Hong-jun, ZHAO Yan-wen. STUDY ON PROPERTIES OF PHENOLIC MODIFIED POLYARYLACETYLENE RESIN MATRIX COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2018, 0(12): 82-88.

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