磷系阻燃改性聚酯的流变性能  

Rheological Properties of Phosphorus Based Flame Retardant Modified Polyester

作　　者：王大业 蒲新明 郑兵 张顺花[1] WANG Daye;PU Xinming;ZHENG Bing;ZHANG Shunhua(College of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou Zhejiang 310018,China;Wankai New Materials Co.Ltd,Jiaxing zhejiang 314400,China)

机构地区：[1]浙江理工大学材料科学与工程学院,浙江杭州310018 [2]万凯新材料有限公司,浙江嘉兴314400

出　　处：《武汉纺织大学学报》2024年第1期94-101,共8页Journal of Wuhan Textile University

基　　金：杭州市萧山区重大科技计划项目(2020105);海宁市协同创新项目(20210102)。

摘　　要：为探究2-羧乙基苯基次磷酸(CEPPA)作为阻燃剂改性合成的阻燃聚酯的可纺性,分别用DSC、TG、毛细管流变仪、旋转流变仪对阻燃改性聚酯进行热稳定性和流变性能测试。结果表明:阻燃聚酯的熔融温度、初始降解温度略微降低,残碳率提高,说明阻燃聚酯的加工温度可降低且成碳效果变好。阻燃聚酯是典型的非牛顿流体,其剪切黏度随着剪切速率的增加而降低,随温度的升高而降低,相比普通聚酯,改性后的阻燃聚酯黏度更低,流动性更好;阻燃改性聚酯的非牛顿指数n均小于1,且随着剪切速率的增加而减小;其黏流活化能随着剪切速率的增加而降低,反映了阻燃聚酯随着剪切速率的增加而对温度的敏感性变小。该研究结果可为阻燃聚酯纤维的制备工艺和参数调整提供参考。In order to investigate the rheological properties of FR-PET(Flame-retardant polyester)modified with 2-carboxyethyl phenyl hypophosphite(CEPPA)as flame retardant,the thermal stability and rheological properties of the flame retardant modified polyester were tested by thermogravimetric analyzer and capillary rheometer,respectively.The results showed that the initial degradation temperature of FR-PET slightly decreased and the residual carbon rate increased,indicating that the carbon formation effect of the flame retardant polyester became better.The shear stress increases with the increase of shear rate and decreases with the increase of temperature,while the shear viscosity decreases with the increase of shear rate and decreases with the increase of temperature,compared with the ordinary polyester,the modified flame retardant polyester has lower viscosity and increased fluidity;the non-Newtonian index n of the flame retardant modified polyester is less than 1,and the non-Newtonian index decreases with the increase of shear rate.The decrease of the viscous activation energy with the increase of shear rate reflects that the sensitivity of flame retardant polyester to temperature decreases gradually with the increase of shear rate;under the premise of the same shear rate and temperature,the fluid shear stress and shear viscosity of flame retardant polyester are lower and the non-Newtonian index and viscous activation energy are greater under 1 mm mouth mold diameter compared with 0.5 mm mouth mold diameter.The results of this study can provide some reference for the preparation process and parameter adjustment of flame retardant polyester fibers.

关 键 词：阻燃聚酯 热稳定性 熔融结晶性能 剪切流变性能 动态流变性能 

分 类 号：TB34[一般工业技术—材料科学与工程]