CHDM/ISB改性PET共聚酯的制备及其性能研究  

Study on synthesis and properties of 1,4-cyclohexanedimethanol/isosorbide modified copolyesters

作　　者：景旋 胡利如 孙玉洁 王余伟 夏峰伟 王金堂 Jing Xuan;Hu Liru;Sun Yujie;Wang Yuwei;Xia Fengwei;Wang Jintang(Research Institute of Sinopec Yizheng Chemical Fibre Co.,Ltd.,Yizheng Jiangsu 211900,China)

机构地区：[1]中国石化仪征化纤有限责任公司研究院,江苏仪征211900

出　　处：《合成技术及应用》2024年第2期41-46,共6页Synthetic Technology & Application

摘　　要：为了合成兼具耐热性能和良好机械性能的共聚酯材料,以异山梨醇(ISB)、1,4-环己烷二甲醇(CHDM)为改性单体,与对苯二甲酸(PTA)、乙二醇(EG)通过直接酯化-熔融缩聚法制备CHDM/ISB改性聚对苯二甲酸乙二醇酯(PET)共聚酯(PEICT)。在固定醇酸物质的量之比和ISB添加量的条件下,研究CHDM与ISB不同配比对共聚酯性能的影响。通过傅里叶变换红外光谱仪、核磁共振分析仪、差示扫描量热仪和热重分析仪对共聚酯结构和性能进行分析。结果表明,ISB和CHDM成功引入到共聚酯分子链中,共聚酯的数均分子量(M n)在29000~30000 g/mol之间,多分散系数为1.99左右。当ISB添加量一定时,随着CHDM添加量的增加,共聚酯的玻璃化转变温度逐渐提高,热稳定性略微降低,拉伸强度逐渐降低,但冲击强度得到提高。By using the direct esterification-melt polycondensation method,isosorbide(ISB)and 1,4-cyclohexanedimethanol(CHDM)as modified monomers were combined with terephthalic acid(PTA)and ethylene glycol(EG)to create CHDM/ISB modified polyethylene terephthalate(PET)copolyesters(PEICT),a type of copolyesters with both good mechanical properties and heat resistance.Fixing the alkyd ratio and the amount of ISB added allowed for the study of the effects of various ratios of CHDM and ISB on the properties of copolyesters.Fourier transform infrared spectrometer,nuclear magnetic resonance analyzer,differential scanning calorimeter,and thermogravimetric analyzer,were used to examine the copolyester structure and properties.The results showed that ISB and CHDM were successfully introduced into the copolyester molecular chain.The copolyester s number-average molecular weight(M n)ranged from 29000 to 30000 g/mol,while its polydispersity coefficient was roughly 1.99.When the amount of ISB added was constant,the glass transition temperature of the copolyester increased gradually as the amount of CHDM added increased,resulting in a slight decrease in thermal stability.Additionally,the addition of CHDM improved the impact strength while the tensile strength gradually declined.

关 键 词：聚对苯二甲酸乙二醇酯 1 4-环己烷二甲醇 异山梨醇 热性能 力学性能 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]