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Application of Box Behnken design to optimize the parameters for chemical modification of polyester using sodium hydroxide

机译：应用Box Behnken设计来优化使用氢氧化钠对聚酯进行化学改性的参数

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摘要

Chemical modification of polyester has been carried out according to Box and Behnken response surface design with three independent variables, viz., alkali concentration, duration of treatment and treatment temperature, at three levels of each variable and the treatment conditions were optimized. It was observed that the treatment with alkali sodium hydroxide with concentration of 40g/L for 45 min at 80 ℃ resulted in maximum modification with minimal weight loss of about 6 %. It was seen that treatment temperature plays a key role in the hydrolysis of polyester. The effect of alkali concentration and treatment time were found to be predominant at glass transition temperature of 80 ℃ because of better diffusion of alkali due to change in molecular orientation. Alkali treated polyester became more pliable and exhibited improved moisture regain with reduction in tensile strength properties due to generation of pits, as observed in scanning electron microscope images.
机译：聚酯的化学改性已根据Box和Behnken响应面设计进行，具有三个独立变量，即碱浓度，处理时间和处理温度，每个变量三个水平，并且优化了处理条件。观察到在80℃下用浓度为40g / L的碱式氢氧化钠处理45分钟可获得最大的改性效果，最小的重量损失约为6％。可以看出，处理温度在聚酯的水解中起关键作用。发现在80℃的玻璃化转变温度下，碱浓度和处理时间的影响最为显着，这是因为分子取向的变化会更好地分散碱。如在扫描电子显微镜图像中所观察到的，由于处理坑的原因，经碱处理的聚酯变得更加柔顺并且显示出改善的回潮性，并且由于产生凹坑而降低了拉伸强度性能。

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  • 来源
    《Man-Made Textiles in India》 |2017年第11期|373-378|共6页
  • 作者

    Harshita Chaudhary; Charu Gupta and; Deepti Gupta;

  • 作者单位

    Department of Fabric and Apparel Science, Institute of Home Economics, University of Delhi, Delhi;

    Department of Fabric and Apparel Science, Institute of Home Economics, University of Delhi, Delhi;

    Department of Textile Technology, Indian Institute of Technology, Delhi;

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