新型亲水抗静电聚醚酯母粒的热性能研究

摘要

以数均相对分子质量为6000的聚乙二醇（ PEG）作为反应型改性组份，并添加一定含量的无机抗静电剂作为改性助剂，在30 L聚合装置上，制备了一种新型的聚对苯二甲酸乙二醇酯（ PET）纤维用亲水抗静电聚醚酯母粒，研究了聚醚酯母粒的热性能。结果表明：添加高含量的 PEG对聚醚酯母粒的结晶过程起到阻碍作用，且随着PEG添加量的增加，聚醚酯母粒的熔点略有降低，同时出现熔融双峰；在氮气环境中，聚醚酯母粒的热分解温度均在400℃以上，且随着PEG含量的增加，聚醚酯母粒的热分解温度逐渐降低；随着PEG含量、热处理温度、热处理时间的增加，聚醚酯母粒的黏度降不断增加，热降解更容易进行，聚醚酯链段更容易断裂成小分子链段。%A novel hydrophilic and antistatic polyether ester masterbatch for polyethylene terephthalate ( PET) fiber was pre-pared by using polyethylene glycol ( PEG ) with the number average molecular mass of 6 000 as a reactive modified component and a certain amount of inorganic antistatic agent as a modifier on a 30-L polymerization plant .The thermal properties of poly-ether ester masterbatch were studied .The results showed that high-content PEG hindered the crystallization process of polyether ester masterbatch;the melting point of polyether ester masterbatch slightly decreased and the double melting peaks appeared as the PEG addition was increased;the thermal decomposition temperature of polyether ester masterbatch was above 400℃in nitro-gen and was gradually decreased as the PEG addition was increased ;and the viscosity of polyether ester masterbatch continuously rose, the thermal degradation proceeded more easily and the polyether ester was more prone to breaking into micromolecule seg -ments as the PEG content and thermal treatment temperature and time were increased .