Effects of 4,4'-Thiobisphenol on the Crysatllization and Melting Behavior of Polyoxymethylene

doi:10.11944/j.issn.1000-0518.2017.02.160193

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (2): 180-186.DOI: 10.11944/j.issn.1000-0518.2017.02.160193

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Effects of 4,4'-Thiobisphenol on the Crysatllization and Melting Behavior of Polyoxymethylene

LEI Xiaomei^a^b,LUO Faliang^a^*(),SHEN Zhiyuan^a,SI Pengfei^a

^aMinistry-Province Co-cultivated Key Laboratory Base of Natural Gas Conversion,Ningxia University,Yinchuan,750021,China
^bSchool of Chemistry and Chemical Engineering of Ningxia University,Yinchuan 750021,China

Received:2016-05-10 Accepted:2016-06-29 Published:2017-01-18 Online:2017-01-18
Contact: LUO Faliang
Supported by:
Supported by the National Natural Science Foundation of China(No.21264012)

Abstract

Abstract:

In order to explore the melting and crystallization behaviors of polyoxymethylene(POM) with the addition of 4,4'-thiobisphenol(TDP), a series of POM/ TDP alloys was prepared by melt blending of POM and TDP. The melting, crystallization behavior and crystal structure were studied by differential scanning calorimeter(DSC) and wide-angle X-ray diffraction(WAXD). The results demonstrate that POM has a less compact crystal structure with addition of TDP, which makes the melt crystallization temperatures(T_c), heat of crystallization(ΔH_c), melting temperatures(T_m) and heat of fusion(ΔH_m) decrease with the increase of the content of TDP. Incorporation of TDP with a mass fraction of 30% leads to reduction of melting point and crystallization temperature by 15.2 ℃ and 12.8 ℃ compared with pure POM, respectively. Meanwhile, it is worth noting that the crystallization time of POM increases with the increase of the content of TDP, the crystallization rate decreases, and crystallization activation energy increases gradually during isothermal crystallization process. The addition of TDP does not influence the crystal structure of POM, but has a great influence on the crystallization and melting behaviors of POM.

Key words: polyoxymethylene, thiobisphenol, melt blending, melting, crystallization

LEI Xiaomei, LUO Faliang, SHEN Zhiyuan, SI Pengfei. Effects of 4,4'-Thiobisphenol on the Crysatllization and Melting Behavior of Polyoxymethylene[J]. Chinese Journal of Applied Chemistry, 2017, 34(2): 180-186.

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Effects of 4,4'-Thiobisphenol on the Crysatllization and Melting Behavior of Polyoxymethylene

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