摘要
用中纯度对苯二甲酸(MTA)代替PTA合成PET,探讨了不同MTA含量对PET聚合反应及切片质量的影响.表征了用MTA合成的PET的性能,并进行了可纺性试验.结果表明,用MTA替代PTA对PET切片的黄色指数(b值)有一定的影响,但通过工艺配方的调整,加入80～100mg/kg醋酸钴(调色剂)可改善产品的色相,合成出性能优良的PET,切片的可纺性良好,其FDY质量指标和白度与常规切片FDY基本相同.用MTA合成的PET结晶机理和常规PET相同,结晶速率高于常规PET,热稳定性略低于常规PET.
Medium-purified terephthalic acid (MTA) was used instead of PTA to synthesize PET. The effect of MTA amount on polymerization reaction and PET chip quality was discussed. The properties of the obtained PET from MTA were characterized. The experiment on PET chip spinnability was conducted. The results showed that MTA instead of PTA had an impact on chip yellow index ( b value) which can be improved by adding 80 - 100 mg/kg cobalt acetate. The obtained PET chip had excellent properties and spinnability and the PET FDY was almost equal to regular PET FDY in quality index and brightness. As compared with regular PET, the synthesized PET from MTA had the same crystallization mechanism, higher crystallization speed and a bit lower thermal stability.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2005年第1期16-19,共4页
China Synthetic Fiber Industry
基金
中石化股份有限公司科技开发项目(202007)。
