Abstract
In this work, we compare the tensile behaviors of two kinds of PPS samples, the mould temperature control sample and thermal curing sample, which undergoing different thermal histories. Based on the SAXS and WAXD results, the crystal structure of PPS is not destroyed in stretching due to its higher Tg. However, the maximum stress value of thermal curing sample is higher than that of mould temperature control sample, though the contribution of crystal phases are the same since their same crystallinity and grain size. The result indicates that the stress of PPS is not only decided by crystal phase (crystallinity) but amorphous phase: the crystal structures carry most part of the stress in stretching process, and the restricted amorphous chains could also carry partial tensile stress. Correlating the possible structure change with mechanical property, it is reasonable to believe higher entanglement density of molecular chains in amorphous phase could lead to more restricted chains, thus giving a higher stress value to thermal curing sample. The theoretical model is proposed to explain the correspondence between micro-structure and macroscopical performance.
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We would like to express our sincere thanks to Prof. Zhongming Li of Sichuan University for his kind assistance in 2D WAXD and SAXS measurements.
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Yang, Y., Duan, H., Zhang, G. et al. Effect of the contribution of crystalline and amorphous phase on tensile behavior of poly (phenylene sulfide). J Polym Res 20, 198 (2013). https://doi.org/10.1007/s10965-013-0198-1
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DOI: https://doi.org/10.1007/s10965-013-0198-1