稳定剂对聚对苯二甲酸乙二醇酯扩链及黏弹性的影响
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摘要
通过监测聚对苯二甲酸乙二醇酯(PET)扩链反应过程中的转矩变化,并结合动态流变测试,研究了三种受阻酚类抗氧剂对PET扩链反应及抑制热降解的影响规律。分析了受阻酚分子结构对PET热稳定的作用机制。结果表明,采用低分子量的抗氧剂3114对PET的热稳定效果最好。与未添加抗氧剂相比,抗氧剂3114加入使得PET扩链反应中最大转矩提高123. 2%,最终转矩提高48. 4%。热加工历程后的PET黏度比未加抗氧剂的提高145. 5%(ω=0. 1 rad/s)。
The influence of three hindered phenolic antioxidants on the chain reaction of polyethylene terephthalate( PET) and the inhibition of thermal degradation were investigated by monitoring the torque change during the chain expansion reaction of PET and combining dynamic rheological tests. The mechanism of hindered phenol molecular structure on thermal stability of PET was analyzed. The results show that the effect of the antioxidant 3114 with low molecular weight is the best for the thermal stability of PET. Comparing with the PET without antioxidants,the addition of antioxidant 3114 increases the maximum torque of PET in chain extension 123. 2%,and the final torque could increase 48. 4%. The viscosity of PET after thermal processing is 145. 5% higher than the PET without adding antioxidant( ω = 0. 1 rad/s).
The influence of three hindered phenolic antioxidants on the chain reaction of polyethylene terephthalate( PET) and the inhibition of thermal degradation were investigated by monitoring the torque change during the chain expansion reaction of PET and combining dynamic rheological tests. The mechanism of hindered phenol molecular structure on thermal stability of PET was analyzed. The results show that the effect of the antioxidant 3114 with low molecular weight is the best for the thermal stability of PET. Comparing with the PET without antioxidants,the addition of antioxidant 3114 increases the maximum torque of PET in chain extension 123. 2%,and the final torque could increase 48. 4%. The viscosity of PET after thermal processing is 145. 5% higher than the PET without adding antioxidant( ω = 0. 1 rad/s).
引文
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[8]王余伟,王金堂.聚酯稳定剂应用现状[J].合成技术及应用,2007(4):32-37.
[9]杨波,陈蓝天.稳定剂及其在聚酯生产中的应用[J].化纤与纺织技术,2003(4):5-10.
[10]纪巍,王鉴,张学佳,等.受阻酚类抗氧剂的复配及发展方向[J].能源化工,2007,28(2):34-38.
[11]热依扎·别坎,马俊红,倪玲贵,等.不同抗氧剂体系对聚丙烯热氧光老化的稳定作用[J].中国塑料,2017,31(5):78-83.
[12]王俊,杨洪军,李翠勤.受阻酚类抗氧剂的研究进展[J].化学与生物工程,2005,22(8):10-12.
[13]RABEK J F.Photostabilization of polymers[M].New York:Elsevier Publishing,1990:63-69.
[14]SCOTT G.Atmospheric Oxidation and Antioxidants[M].New York:Elsevier Publishing,1993:25-29.
[15]魏宇佳.聚烯烃用受阻酚抗氧剂的分子结构对抗氧化性能的影响[D].大庆:东北石油大学,2014.
[2]AWAJA F,DAVER F,KOSIOR E,et al.The effect of chain extension on the thermal behaviour and crystallinity of reactive extruded recycled PET[J].J Thermal Anal Calorim,2004,78(3):865-884.
[3]步玉磊.PET的扩链/支化改性及发泡成型研究[D].广州:华南理工大学,2010.
[4]DHAVALIKAR R,XANTHOS M.Parameters affecting the chain extension and branching of PET in the melt state by polyepoxides[J].J Appl Polym Sci,2003,87(4):643-652.
[5]DHAVALIKAR R,XANTHOS M.Monitoring the evolution of PET branching through chemorheology[J].Polym Eng Sci,2004,44(3):474-486.
[6]DHAVALIKAR R,YAMAGUCHI M,XANTHOS M.Molecular and structural analysis of a triepoxide-modified poly(ethylene terephthalate)from rheological data[J].J Polym Sci,Part A:Polym Chem,2003,41(7):958-969.
[7]SAMPERI F,PUGLISI C,ALICATA R,et al.Thermal degradation of poly(ethylene terephthalate)at the processing temperature[J].Polym Degrad Stab,2004,83:3-10.
[8]王余伟,王金堂.聚酯稳定剂应用现状[J].合成技术及应用,2007(4):32-37.
[9]杨波,陈蓝天.稳定剂及其在聚酯生产中的应用[J].化纤与纺织技术,2003(4):5-10.
[10]纪巍,王鉴,张学佳,等.受阻酚类抗氧剂的复配及发展方向[J].能源化工,2007,28(2):34-38.
[11]热依扎·别坎,马俊红,倪玲贵,等.不同抗氧剂体系对聚丙烯热氧光老化的稳定作用[J].中国塑料,2017,31(5):78-83.
[12]王俊,杨洪军,李翠勤.受阻酚类抗氧剂的研究进展[J].化学与生物工程,2005,22(8):10-12.
[13]RABEK J F.Photostabilization of polymers[M].New York:Elsevier Publishing,1990:63-69.
[14]SCOTT G.Atmospheric Oxidation and Antioxidants[M].New York:Elsevier Publishing,1993:25-29.
[15]魏宇佳.聚烯烃用受阻酚抗氧剂的分子结构对抗氧化性能的影响[D].大庆:东北石油大学,2014.