文献类型：期刊文献

中文题名：CO_2在PET熔体中的溶解度

英文题名：Solubility of CO_2 in molten poly(ethylene terephthalate)

作者：仲华[1];孙少俊[1];奚桢浩[1];刘涛[1];赵玲[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2013

卷号：64

期号：5

起止页码：1513

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20132216383902);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金项目(21176070);国家高技术研究发展计划项目(2012AA040211);中央高校基本科研业务费专项资金~~

语种：中文

中文关键词：聚对苯二甲酸乙二醇酯;二氧化碳;溶胀度;溶解度

外文关键词：poly（ethylene terephthalate）; carbon dioxide; swelling ratio; solubility

摘要：通过高温高压磁悬浮天平(MSB)测定表观溶解度、高温高压视窗釜进行溶胀度校正的方法研究了CO2在PET熔体中的溶解度,考察了温度、压力对改性前后PET在CO2环境中的溶胀度和CO2溶解度的影响。结果表明,PET在CO2环境中的溶胀度和CO2溶解度均随温度的增加而减小,随压力增加而增加,但高压下溶胀度的增加趋势减缓并趋于某定值;与常规线性PET相比,改性PET具有较小的溶胀度和溶解度。在250～280℃,4～6MPa下,CO2在PET熔体中的溶解度具有10-2 g CO2.(g PET melt)-1的量级。1～6MPa下CO2在PET熔体中的溶解行为符合亨利定律,利用最小二乘法拟合得到了CO2在PET熔体中的溶解热。
The solubility of CO2 in poly（ethylene terephthalate）（PET） was studied using magnetic suspension balance（MSB） combined with high-temperature high-pressure view cell.The former gives apparent solubility and the latter presents swelling volume through direct observation in the presence of CO2,which is necessary to correct the gas buoyancy acting on PET melts in the MSB measurement.The effects of temperature and pressure on the swelling ratio and CO2 solubility in traditional and modified PET melt were analyzed.The results show that both swelling ratio of PET and solubility of CO2 decrease as temperature increases and increase with pressure.However,the swelling ratio increases slowly and approaches a plateau region under higher pressure.Compared with traditional linear PET,the modified PET displays lower swelling ratio and solubility.Solubility of CO2 in PET melt is in an order of magnitude of 10-2 g CO2·（g PET melt）-1 under 4—6 MPa in the temperature range of 250—280℃.CO2 solubility in PET melt agrees well with Henry＇s law in the pressure range of 1—6 MPa.Heat of solution is obtained using the least-square method.