Influence of Network Structure on Dynamic Mechanical Properties of Cross-Linked Polystyrene / Glass Fiber Composites

Abstract:

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The cross-linked polystyrene prepolymer was synthesized with divinylbenzene (DVB) as crosslinker via free-radical crosslinking copolymerization (FCC) and used as the matrix materials for E-glass fiber reinforced composites. The surface modification was performed by treatment of E-glass fiber with γ-methacryloylpropyl trimethoxysilane (MPS) solution. Fourier transform infrared spectroscopy (FTIR) was used to identify the functional groups on the surface modified glass fibers. Dynamic mechanical thermal analysis (DMTA) of these composites revealed that the dynamic storage modulus (E′) was gradually enhanced with the increasing content of DVB (0~3.0 wt %) whereas the damping parameter (tanδ) peaks are lower and broader, indicating better load bearing capacity. Moreover, the Tg was shifted to higher temperature corresponding to the increasing of crosslinking density. Morphology of fracture surfaces for these composites showed different fiber-matrix interfacial adhesion which was mainly attributed to the variation of crosslinking network structure in the interface.

Info:

Periodical:

Advanced Materials Research (Volumes 79-82)

Edited by:

Yansheng Yin and Xin Wang

Pages:

151-154

DOI:

10.4028/www.scientific.net/AMR.79-82.151

Citation:

Q. Y. Zhu et al., "Influence of Network Structure on Dynamic Mechanical Properties of Cross-Linked Polystyrene / Glass Fiber Composites", Advanced Materials Research, Vols. 79-82, pp. 151-154, 2009

Online since:

August 2009

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Price:

$35.00

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