熔融温度对PPS结晶度与结晶行为的影响
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摘要
为了研究熔融温度对聚苯硫醚(PPS)结晶度与结晶行为的影响,利用差示扫描量热(DSC)仪研究了不同熔融温度制备PPS的结晶度及结晶行为的差异;利用热重(TG)分析仪研究了熔融温度对PPS成型过程中热氧交联程度的影响。结果表明,在熔融温度为300～360℃时,PPS的结晶度随熔融温度的升高先增大后减小,熔融温度为320℃时相对结晶度最大,最大值为44.6%,熔融温度为360℃时相对结晶度最小,最小值为23.3%;320℃时结晶峰强最大,峰宽最窄,后随熔融温度的升高结晶峰向低温方向移动,峰强减弱、峰宽增加。在300～360℃范围内,热失重率随着熔融温度的升高先平稳后下降。这是由于PPS分子活性、分子链的热氧交联反应随熔融温度的不同具有不同的表现形式,进而影响PPS的结晶度与结晶行为;随熔融温度的升高,PPS分子链热氧交联反应加剧,在高温下难以降解。通过控制熔融温度改变PPS的结晶度,制备具有性能差异的PPS材料,满足不同的工程应用需求。
In order to study of the effects of different melting temperatures on the crystallinity and crystallization behavior of polyphenylene sul?de(PPS), the crystallinity and crystallization behavior of PPS processed by different melting temperatures were investigated by differential scanning calorimetry(DSC). The effects of different melting temperatures on the degree of thermal oxygen crosslinking on molding process of PPS were studied by thermogravimetric analysis(TGA). The results show that in condition of the melting temperature from 300 to 360℃,the crystallinity of PPS resin ?rstly increases then decreases with the melting temperature increasing. The relative crystallinity reaches at the maximum value at 320℃,which is 44.6% and the minimum value is 23.3%at 360℃. A strongest and narrowest crystallization peak is obtained at 320℃. Then the peak width began increase and peak intensity decreases with the melting temperature increasing. From 300℃ to 360℃,the thermal weight loss rate of PPS ?rstly kept stable then decreases with the melting temperature increasing. This is due to the different manifestations of molecular activity and thermal oxygen crosslinking reaction of PPS molecular chains with different melting temperature,and thus affect crystallinity and crystallization behavior of PPS material. The enhancement of molecular chain's crosslinking reaction with the increase of melting temperature,makes it dif?cult to thermally degrade at high ambient temperature. By controlling the melting temperature to change the crystallinity of PPS,materials with different performance properties can be obtained, to meet different engineering application requirements.
In order to study of the effects of different melting temperatures on the crystallinity and crystallization behavior of polyphenylene sul?de(PPS), the crystallinity and crystallization behavior of PPS processed by different melting temperatures were investigated by differential scanning calorimetry(DSC). The effects of different melting temperatures on the degree of thermal oxygen crosslinking on molding process of PPS were studied by thermogravimetric analysis(TGA). The results show that in condition of the melting temperature from 300 to 360℃,the crystallinity of PPS resin ?rstly increases then decreases with the melting temperature increasing. The relative crystallinity reaches at the maximum value at 320℃,which is 44.6% and the minimum value is 23.3%at 360℃. A strongest and narrowest crystallization peak is obtained at 320℃. Then the peak width began increase and peak intensity decreases with the melting temperature increasing. From 300℃ to 360℃,the thermal weight loss rate of PPS ?rstly kept stable then decreases with the melting temperature increasing. This is due to the different manifestations of molecular activity and thermal oxygen crosslinking reaction of PPS molecular chains with different melting temperature,and thus affect crystallinity and crystallization behavior of PPS material. The enhancement of molecular chain's crosslinking reaction with the increase of melting temperature,makes it dif?cult to thermally degrade at high ambient temperature. By controlling the melting temperature to change the crystallinity of PPS,materials with different performance properties can be obtained, to meet different engineering application requirements.
引文
[1]Anagreh N,Dorn L,Bilke-krause C.Low-pressure plasma pretreatment of polyphenylene sulfide(PPS)surfaces for adhesive bonding[J].Int J Adhes Adhes,2007,28(1-2):16-22.
[2]Diez-pascual A M,Naffakh M,Marco C,et al.Mechanical and electrical properties of carbon nanotube/poly(phenylenesulphide)composites incorporating polyetherimide and inorganic fullerenelike nanoparticles[J].Composites Part A,2012,43(4):603-612.
[3]Diez-pascual A M,Naffakh M.Synthesis and characterization of nitrated and aminated poly(phenylene sulfide)derivatives for advanced applications[J].Mater Chem Phys,2012,131(3):605-614.
[4]陈亚莉.高性能热塑性复合材料在飞机上的应用[J].航空维修与工程,2003(3):28-30.Chen Yali.Application of thermoplastic composites on aircraft[J].Aviation Maintenance and Engineering,2003(3):28-30.
[5]相鹏伟,姜春阳,戚晓兵,等.聚苯硫醚长丝的研究现状及其应用进展[J].合成纤维工业,2018,41(6):54-58.Xiang Pengwei,Jiang Chunyang,Qi Xiaobing,et al.Research status and application development of polyphenylene sulfide filament[J].China Synthetic Fiber Industry,2018,41(6):54-58.
[6]Batusta N L,Olivier P,Bernhart G,et al.Correlation between degree of crystallinity,morphology and mechanical properties of PPS/carbon fiber laminates[J].Materials Research,2016,19(1):195-201.
[7]Silvestre C,Dipace E,Napolitano R,et al.Crystallization,morphology,and thermal behavior of poly(p-phenylene sul-fide)[J].J Polym Sci,2001,39:415-424.
[8]章日超,芦艾,易勇,等.聚苯硫醚及其纤维增强复合材料的等温结晶形态[J].复合材料学报,2007,24(2):61-67.Zhang Richao,Lu Ai,Yi Yong,et al.Morphologies of isothermal crystallized pure poly(phenylene sulfide)and fiber-reinforced poly(phenylene sulfide)composites[J].Acta Materiae Compositae Sinica,2007,24(2):61-67.
[9]崔宁,李杰,吴鹏飞,等.国产聚苯硫醚短纤维的研究开发[J].高科技纤维与应用,2008,33(6):23-27.Cui Ning,Li Jie,Wu Pengfei,et al.Development of domestic polyphenylene sulfide staple[J].Hi-Tech Fiber&Application,2008,33(6):23-27.
[10]刘鹏清,吴炜誉,李守群,等.拉伸与热定型对聚苯硫醚长丝结构性能的影响[J].合成纤维工业,2008,31(2):8-11,15.Liu Pengqing,Wu Weiyu,Li Shouqun,et al.Effect if drawing and heat setting process on structure and properties of polyphenylene sulfide filament[J].China Synthetic Fiber Industry,2008,31(2):8-11,15.
[11]Diez-pascual A M,Naffakh M.Synthesis and characterization of nitrated and aminated poly(phenylene sulphide)derivatives for advanced applications[J].Materials Chemistry and Physics,2012,131(3):605-614.
[12]Lou F L,Xu Y,Pang H,et al.Non-isothermal crystallization kinetics of poly(phenylenesulfide)with low crosslinking levels[J].Chinese Journal of Polymer Science,2013,33(3):462-470.
[13]刘艳伟,卢艾,杨海波.聚苯硫醚热交联特性研究进展[J].高分子通报,2012(8):74-79.Liu Yanwei,Lu Ai,Yang Haibo.Research on thermal crosslinking character of poly(phenylene sulfide)[J].Chinese Polymer Bulletin,2012(8):74-79.
[14]Motta-dias M H,Jansen K M B,Luinge J W.Effect of fibermatrix adhesion on the creep behavior of CF/PPS composites temperature and physical aging characterization[J].Mech TimeDepend Mater,2016,20:245-262.
[15]徐敏,刘畅,孙晓敏,等.结晶行为改善聚乳酸韧性的研究进展[J].塑料,2018,47(2):68-74.Xu Min,Liu Chang,Sun Xiaomin,et al.Research progress in toughening of polylactic acid via crystallization behavior[J].Plastics,2018,47(2):68-74.
[2]Diez-pascual A M,Naffakh M,Marco C,et al.Mechanical and electrical properties of carbon nanotube/poly(phenylenesulphide)composites incorporating polyetherimide and inorganic fullerenelike nanoparticles[J].Composites Part A,2012,43(4):603-612.
[3]Diez-pascual A M,Naffakh M.Synthesis and characterization of nitrated and aminated poly(phenylene sulfide)derivatives for advanced applications[J].Mater Chem Phys,2012,131(3):605-614.
[4]陈亚莉.高性能热塑性复合材料在飞机上的应用[J].航空维修与工程,2003(3):28-30.Chen Yali.Application of thermoplastic composites on aircraft[J].Aviation Maintenance and Engineering,2003(3):28-30.
[5]相鹏伟,姜春阳,戚晓兵,等.聚苯硫醚长丝的研究现状及其应用进展[J].合成纤维工业,2018,41(6):54-58.Xiang Pengwei,Jiang Chunyang,Qi Xiaobing,et al.Research status and application development of polyphenylene sulfide filament[J].China Synthetic Fiber Industry,2018,41(6):54-58.
[6]Batusta N L,Olivier P,Bernhart G,et al.Correlation between degree of crystallinity,morphology and mechanical properties of PPS/carbon fiber laminates[J].Materials Research,2016,19(1):195-201.
[7]Silvestre C,Dipace E,Napolitano R,et al.Crystallization,morphology,and thermal behavior of poly(p-phenylene sul-fide)[J].J Polym Sci,2001,39:415-424.
[8]章日超,芦艾,易勇,等.聚苯硫醚及其纤维增强复合材料的等温结晶形态[J].复合材料学报,2007,24(2):61-67.Zhang Richao,Lu Ai,Yi Yong,et al.Morphologies of isothermal crystallized pure poly(phenylene sulfide)and fiber-reinforced poly(phenylene sulfide)composites[J].Acta Materiae Compositae Sinica,2007,24(2):61-67.
[9]崔宁,李杰,吴鹏飞,等.国产聚苯硫醚短纤维的研究开发[J].高科技纤维与应用,2008,33(6):23-27.Cui Ning,Li Jie,Wu Pengfei,et al.Development of domestic polyphenylene sulfide staple[J].Hi-Tech Fiber&Application,2008,33(6):23-27.
[10]刘鹏清,吴炜誉,李守群,等.拉伸与热定型对聚苯硫醚长丝结构性能的影响[J].合成纤维工业,2008,31(2):8-11,15.Liu Pengqing,Wu Weiyu,Li Shouqun,et al.Effect if drawing and heat setting process on structure and properties of polyphenylene sulfide filament[J].China Synthetic Fiber Industry,2008,31(2):8-11,15.
[11]Diez-pascual A M,Naffakh M.Synthesis and characterization of nitrated and aminated poly(phenylene sulphide)derivatives for advanced applications[J].Materials Chemistry and Physics,2012,131(3):605-614.
[12]Lou F L,Xu Y,Pang H,et al.Non-isothermal crystallization kinetics of poly(phenylenesulfide)with low crosslinking levels[J].Chinese Journal of Polymer Science,2013,33(3):462-470.
[13]刘艳伟,卢艾,杨海波.聚苯硫醚热交联特性研究进展[J].高分子通报,2012(8):74-79.Liu Yanwei,Lu Ai,Yang Haibo.Research on thermal crosslinking character of poly(phenylene sulfide)[J].Chinese Polymer Bulletin,2012(8):74-79.
[14]Motta-dias M H,Jansen K M B,Luinge J W.Effect of fibermatrix adhesion on the creep behavior of CF/PPS composites temperature and physical aging characterization[J].Mech TimeDepend Mater,2016,20:245-262.
[15]徐敏,刘畅,孙晓敏,等.结晶行为改善聚乳酸韧性的研究进展[J].塑料,2018,47(2):68-74.Xu Min,Liu Chang,Sun Xiaomin,et al.Research progress in toughening of polylactic acid via crystallization behavior[J].Plastics,2018,47(2):68-74.