Papers by Keyword: Poly(phenylene sulfide)

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Authors: Kunio Mori, Zhi Xin Kang, Jan Oravec, Yoshiyuki Oishi
921
Authors: Zhong Hou Zhang, Guang Xiu Cao, Ying Ying Li, Chun Mian Yan
Abstract: Poly (phenylene sulfide) (PPS)/nano-TiO2 composites were prepared by DAKA miniature blending instrument. Isothermal crystallization behavior of PPS composites at 245°C, 250°C, 255°C and 260°C were investigated by means of DSC. The crystallization time of PPS composites is shorter than which of neat PPS at the same crystallization temperature. The Avrami equation was used to analyze DSC data. Results showed that neat PPS is homogeneous nucleation at lower crystallization temperature, which is heterogeneous nucleation at higher crystallization temperature contrarily. PPS/nano-TiO2 composites are heterogeneous nucleation at various crystallization temperature, nano-TiO2 particles play a role of nucleating agent.
1909
Authors: Zhong Hou Zhang, Wen Xin Zhou, Ya Dong Li, Chun Mian Yan
Abstract: Poly (phenylene sulfide) (PPS)/nano-ZnO composites were prepared by DAKA miniature blending instrument. Isothermal crystallization behavior of PPS composites at 245°C, 250°C, 255°C and 260°C were investigated by means of DSC. The crystallization time of PPS composites is shorter than which of neat PPS at the same crystallization temperature. The Avrami equation was used to analyze DSC data. Results showed that neat PPS is homogeneous nucleation at lower crystallization temperature, which is heterogeneous nucleation at higher crystallization temperature contrarily. PPS/nano-ZnO composites are heterogeneous nucleation at various crystallization temperature, nano-ZnO particles play a role of nucleating agent.
243
Authors: Jian Qiang Zhang, Hui Xia Feng, Jian Hui Qiu
Abstract: The wet surface modification process were used in this work to get the well lipophilic molybdenum disulfide (MoS2) powders and the modified MoS2 were filled into the polyphenylene sulfide (PPS) and polypropylene (PP) powders with different proportions to make polymeric based composites through hot-press molding equipment. The Fourier transform infrared spectrometer (FT-IR) analysis showed that the modification agents of stearic acid (SA), orγ-Methacryloxypropyl trimethoxy silane(KH570 or A-174), could react with the adsorption hydroxyl(−OH) of the MoS2 powders and finally form chemical coatings, the SA could form a layer of physics wrap too. The powder X-ray diffraction (XRD) analysis reveled that the SA or KH570 could not change the laminated structure of MoS2. The wearability testing showed that the composites filled by modified MoS2 owned the better wearable performances than the filled not one. From minimum to maximum, the wear mass rates of SA/MoS2/PP/PPS, KH570/MoS2/PP/PPS, PP/PPS were 0.7216, 5.4187 and 7.3198 percent in turns. Scanning electronic microscope (SEM) analysis showed the surface modification could uniformize the modified MoS2 to disperse in the polymeric based composites, and also reflect the abrasion mechanism which the particles and the adhering wear modes could all make the mass loss of the testing samples and they coexisted and could transform each other, the former would produce higher loss rates than the later and their leader status would gradually change from the particles wear to the adhering wear during the course of wearing-resisting tests.
345
Authors: Ze Xu Hu, Si Meng, Qiu Xu Lu, Heng Xue Xiang, Zi Ye Chen, Pei Ling Wei, Mei Fang Zhu
Abstract: A new kind of functionalized graphene nanoplatelets (GNPs), poly (phenylene sulfide) (PPS) grafted GNPs (GNPs-g-PPS), have been successfully prepared by Friedel–Crafts reaction and in-situ grafting polymerization. In this paper, we produced PPS/GNPs-g-PPS and PPS/GNPs nanocomposite materials where PPS-g-GNPs and pristine GNPs acted as inorganic fillers. It was observed that PPS/GNPs-g-PPS exhibited superior spinnability due to its better compatibility and dispersibility of GNPs in the PPS matrix. Non-isothermal crystallization properties, thermal resistances and thermal stabilities were studied. The results showed that the crystallization behavior and thermal stability of PPS was strongly enhanced with only 1.0 wt.% GNPs-g-PPS added.
2246
Authors: Yu Zhou, Bo Wen Cheng, Zhen Huan Li, De Xin Shen, Sheng Zhang, Hai Liang Feng, Lei Zhang, Ma Liang Zhang
Abstract: A linear and high molecular weight poly(phenylene sulfide) (PPS) was synthesized from P-dichlorobenzene (P-DCB) and anhydrous sodium sulfide in N-methyl pyrrolidone (NMP), and the High Temperature Gel Permeation Chromatography (HTGPC) technique was utilized to investigate the effects of reaction condition on PPS chain propagation. The experiment results indicated that the high pro-reaction temperature or high post-temperature would interfere with PPS chain propagation, and post-reaction time was another important factor to influence PPS molecular weight (Mw) extension. Furthermore, the optimized ratio of high Mw PPS polymer synthesis was typically at 3-6% molar excess of Na2S over p-dichlorobenzene, and N-methyl-2-pyrrolidone (NMP) were beneficial to the production of high Mw PPS due to the formation of sodium 4-(N-methylamino) butanoate (SMAB). The alkaline reagents such as Na3PO4 and K3PO4 et al could capture the H of -SH, which changed -SH into -SNa and promoted the chain growth of PPS to achieve extension.
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