Factors on Measurement of Thermal Expansionfor Glass Fiber/ Phenolic Resin Composites

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Factors on Measurement of Thermal Expansionfor Glass Fiber/ Phenolic Resin Composites
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Abstract:

Several runs of thermal expansion measurements was presented for Pyros specimen, the precision and

bias of the result show that the instrument is in a good condition. A large number of thermal expansion measurements

was presented for the glass fiber/ phenolic resin composites as a function of holding time, heating rate and curing treat鄄

ment. The specimen was further cured by the increase of temperature, and the shrinkage of the specimen by the loss

of volatiles and the thermal deformation of curing reaction can counteract the expansion by the heating, which caused

plateau on the heating curves. Repeated expansion measurements for the specimen shows that the curves of heating

and cooling progress were almost identical. Heating treatment is necessary before thermal expansion measurements,

and the heating temperature should be higher than the measurement temperature, but lower than curing temperature

which keeps the microstructure of composites unchanged. The appropriate heating rate should be applied, for higher

heating rate will infect precision of the measured result, while lower heating rate will increase time cost

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Online: November 28,2016
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