PBT树脂湿热老化性能
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摘要
研究了聚对苯二甲酸丁二酯(PBT)在85℃,85%湿度情况下的湿热老化性能。研究了湿热老化条件下PBT的强度、韧性、耐热性、熔体流动速率和端羧基含量等的变化。结果表明,湿热老化对PBT的韧性的影响明显大于对强度的影响,湿热老化对PBT韧性的影响排序:断裂伸长率>无缺口冲击强度>缺口冲击强度>挠度;PBT的初始黏度和端羧基含量对材料的湿热老化具有较大的影响;而抗水解剂的加入能明显地提高PBT的耐水解性能,且随着抗水解剂含量的增加,PBT的耐水解性明显提高。端羧基含量和水分是PBT树脂湿热老化过程中的关键控制因素,PBT树脂中初始端羧基含量越低,其耐湿热老化性能越好。
The humidity-heat aging of PBT resin at 85℃ and 85% humidity were studied. The strength,toughness,heat resistance,melting flowing index and content of carboxyl terminus of PBT resin were studied on the humidity-heat condition. It is found that the effect of humidity-heat aging on the toughness of PBT resin is obviously greater than the effect on the strength. The effect of humidity-heat aging on the toughness of PBT resin is as follows:elongation at break>impact strength >notch impact strength >deflection. The initial viscosity and the content of the carboxyl terminus of PBT resin have a great influence on the moisture and heat aging of the material. Moreover,the hydrolysis resistance of PBT resin was obviously improved by the addition of anti-hydrolytic agent,and the water resistance of PBT resin was obviously improved with the increase of anti-hydrolytic agent content. The carboxyl terminus and moisture content are the key controlling factors in the process of PBT resin humidity-heat aging. The lower the initial carboxyl terminus content of PBT resin is, the better its humidity-heat aging performance is.
The humidity-heat aging of PBT resin at 85℃ and 85% humidity were studied. The strength,toughness,heat resistance,melting flowing index and content of carboxyl terminus of PBT resin were studied on the humidity-heat condition. It is found that the effect of humidity-heat aging on the toughness of PBT resin is obviously greater than the effect on the strength. The effect of humidity-heat aging on the toughness of PBT resin is as follows:elongation at break>impact strength >notch impact strength >deflection. The initial viscosity and the content of the carboxyl terminus of PBT resin have a great influence on the moisture and heat aging of the material. Moreover,the hydrolysis resistance of PBT resin was obviously improved by the addition of anti-hydrolytic agent,and the water resistance of PBT resin was obviously improved with the increase of anti-hydrolytic agent content. The carboxyl terminus and moisture content are the key controlling factors in the process of PBT resin humidity-heat aging. The lower the initial carboxyl terminus content of PBT resin is, the better its humidity-heat aging performance is.
引文
[1]石安富,龚云表.工程塑料–性能–成型–应用[M].上海:上海科学技术出版社,1986.Shi Anfu,Gong Yunbiao.Engineering plastic—property—moulding—application[M].Shanghai:Shanghai Science and Technology Press,1986.
[2]金国珍.工程塑料[M].北京:化学工业出版社,2001.Jin Guozhen.Engineering plastics[M].Beijing:Chemical Industry Press,2001.
[3]Aljoumaa K,Abboudi M.Physical ageing of polyethylene terephthalate under natural sunlight:correlation study between crystallinity and mechanical properties[J].Applied Physics A,2016,122(1):1–10.
[4]梁超,李文刚,张幼维,等.PET纤维热老化的研究[J].合成技术及应用,2014,29(1):15–18.Liang Chao,Li Wengang,Zhang Youwei,et al.Study on thermal aging of PET fiber[J].Synthetic Technology and Application,2014,29(1):15–18.
[5]Pegoretti A,Penati A.Effects of hygrothermal aging on the molar mass and thermal properties of recycled poly(ethylene terephthalate)and its short glass fibre composites[J].Polymer Degradation and Stability,2004,86(2):233–243.
[6]Hosseini S S,Taheri S,Zadhoush A,et al.Hydrolytic degradation of poly(ethylene terephthalate)[J].Journal of Applied Polymer Science,2007,103(4):2 304–2 309.
[7]杜斌,杨睿,谢续明.聚对苯二甲酸乙二醇酯水热老化过程中的物理和化学变化[J].塑料,2011,40(5):24-27.Du Bin,Yang Rui,Xie Xuming.Physical and chemical changes during hydrothermal aging of poly(ethylend terephthalate)[J].Plastics,2011,40(5):24–27.
[8]Martinj R,Gardnerr J.长期湿热老化对塑料的影响[J].合成材料老化与应用,1983(1):34–51.Martin J R,Gardner R J.The effect of long term wet heat aging on plastics[J].Synthetic Materials Aging and Application,1983(1):34–51.
[9]胡战洪,蔡泽发,苏玉珍,等.光缆用PBT松套管材料的热水解性能的实验研究(一)[J].网络电信,2004(5):33–35.Hu Zhanhong,Cai Zefa,Su Yuzhen,et al.Experimental study on hot water solution properties of pbt loose tube materials for optical cable(I)[J].Network Telecom,2004(5):33–35.
[10]郭宝华,丁慧鸽,周明波,等.聚对苯二甲酸丁二醇酯(PBT)抗水解性能的研究[J].材料科学与工艺,2001,3(9):312–315.Guo Baohua,Ding Huige,Zhou Mingbo,et al.Study on hydrolysis-resistant poly(butylene terephthalate)(PBT)[J].Materials Science and Technology,2001,3(9):312–315.
[11]Foulc M P,Bergeret A,Ferry L,et al.Study of hygrothermal ageing of glass fibre reinforced PET composites[J].Polymer DegradationandStability,2005,89(3):461–470.
[12]Kanuga K.Degradation of polyester film exposed to accelerated indoor damp heat aging[C]∥Photovoltaic Specialists Conference(PVSC)2011 37th IEEE.New York:IEEE,2011:96–100.
[13]马玫,黄庆武,雷祖碧.PBT的湿热老化性能研究(一)[J].合成材料老化与应用,2012,41(4):5–8,48.Ma Mei,Huang Qingwu,Lei Zubi.Study on humidity-heat aging of PBT(I).[J].Synthetic Materials Ageing and Application.2012,41(4):5–8,48.
[14]马玫,雷祖碧.PBT的湿热老化性能研究(二)[J].合成材料老化与应用,2014,43(3):10–12.Ma Mei,Lei Zubi.Study on humidity-heat aging of PBT(Ⅱ)[J].Synthetic Materials Aging and Application,2014,43(3):10–12.
[15]肖迎红,Anne B,Marie-Pierre F.PET的湿热老化性能研究[J].塑料科技,2001(4):22–24.Xiao Yinghong,Anne B,Marie-Pierre F.Study of the hygrothermal ageing behavior of PET[J].Plastics Science and Technology,2001(4):22–24.
[2]金国珍.工程塑料[M].北京:化学工业出版社,2001.Jin Guozhen.Engineering plastics[M].Beijing:Chemical Industry Press,2001.
[3]Aljoumaa K,Abboudi M.Physical ageing of polyethylene terephthalate under natural sunlight:correlation study between crystallinity and mechanical properties[J].Applied Physics A,2016,122(1):1–10.
[4]梁超,李文刚,张幼维,等.PET纤维热老化的研究[J].合成技术及应用,2014,29(1):15–18.Liang Chao,Li Wengang,Zhang Youwei,et al.Study on thermal aging of PET fiber[J].Synthetic Technology and Application,2014,29(1):15–18.
[5]Pegoretti A,Penati A.Effects of hygrothermal aging on the molar mass and thermal properties of recycled poly(ethylene terephthalate)and its short glass fibre composites[J].Polymer Degradation and Stability,2004,86(2):233–243.
[6]Hosseini S S,Taheri S,Zadhoush A,et al.Hydrolytic degradation of poly(ethylene terephthalate)[J].Journal of Applied Polymer Science,2007,103(4):2 304–2 309.
[7]杜斌,杨睿,谢续明.聚对苯二甲酸乙二醇酯水热老化过程中的物理和化学变化[J].塑料,2011,40(5):24-27.Du Bin,Yang Rui,Xie Xuming.Physical and chemical changes during hydrothermal aging of poly(ethylend terephthalate)[J].Plastics,2011,40(5):24–27.
[8]Martinj R,Gardnerr J.长期湿热老化对塑料的影响[J].合成材料老化与应用,1983(1):34–51.Martin J R,Gardner R J.The effect of long term wet heat aging on plastics[J].Synthetic Materials Aging and Application,1983(1):34–51.
[9]胡战洪,蔡泽发,苏玉珍,等.光缆用PBT松套管材料的热水解性能的实验研究(一)[J].网络电信,2004(5):33–35.Hu Zhanhong,Cai Zefa,Su Yuzhen,et al.Experimental study on hot water solution properties of pbt loose tube materials for optical cable(I)[J].Network Telecom,2004(5):33–35.
[10]郭宝华,丁慧鸽,周明波,等.聚对苯二甲酸丁二醇酯(PBT)抗水解性能的研究[J].材料科学与工艺,2001,3(9):312–315.Guo Baohua,Ding Huige,Zhou Mingbo,et al.Study on hydrolysis-resistant poly(butylene terephthalate)(PBT)[J].Materials Science and Technology,2001,3(9):312–315.
[11]Foulc M P,Bergeret A,Ferry L,et al.Study of hygrothermal ageing of glass fibre reinforced PET composites[J].Polymer DegradationandStability,2005,89(3):461–470.
[12]Kanuga K.Degradation of polyester film exposed to accelerated indoor damp heat aging[C]∥Photovoltaic Specialists Conference(PVSC)2011 37th IEEE.New York:IEEE,2011:96–100.
[13]马玫,黄庆武,雷祖碧.PBT的湿热老化性能研究(一)[J].合成材料老化与应用,2012,41(4):5–8,48.Ma Mei,Huang Qingwu,Lei Zubi.Study on humidity-heat aging of PBT(I).[J].Synthetic Materials Ageing and Application.2012,41(4):5–8,48.
[14]马玫,雷祖碧.PBT的湿热老化性能研究(二)[J].合成材料老化与应用,2014,43(3):10–12.Ma Mei,Lei Zubi.Study on humidity-heat aging of PBT(Ⅱ)[J].Synthetic Materials Aging and Application,2014,43(3):10–12.
[15]肖迎红,Anne B,Marie-Pierre F.PET的湿热老化性能研究[J].塑料科技,2001(4):22–24.Xiao Yinghong,Anne B,Marie-Pierre F.Study of the hygrothermal ageing behavior of PET[J].Plastics Science and Technology,2001(4):22–24.