己二酸环氧环己烷酯改性水溶性聚酯的制备及其膜性能研究

以对苯二甲酸(PTA)、乙二醇(EG)、间苯二甲酸-5-磺酸钠(SIPA)为主要原料,自制己二酸环氧环己烷酯(ACHD)为改性剂,制备了酸值为9～14 mg KOH/g、羟值为85～110 mg KOH/g、特性黏度为0.26～0.31 dL/g的己二酸环氧环己烷酯改性水溶性聚酯(MWPET),并进一步制备了厚度≤45...

Preparation and membrane properties of epoxy cyclohexane adipate-modified watersoluble polyester

Self-made epoxy cyclohexyl adipate(ACHD)-modified water-soluble polyester(MWPET)was prepared with terephthalic acid(PTA),ethylene glycol(EG)and sodium isophthalic acid-5-sulfonate(SIPA)as main raw materials and epoxy cyclohexane adipate(ACHD)as a modifier,and it achieved an acid value of 9~14 mg KOH/g,a hydroxyl value of 85~110 mg KOH/g,and an intrinsic viscosity of 0.26~0.31 dL/g.The MWPET membrane with a thickness≤45μm and a gloss of about 100 Gu was further prepared.ACHD and MWPET were characterized using infrared spectrometer,nuclear magnetic resonance,and mass spectrometer.The pencil hardness,adhesion,water resistance,chemical resistance,and water absorption of MWPET membrane were analyzed.The analysis results confirmed the successful synthesis of ACHD.With increasing the ACHD content,the MWPET showed a decrease in glass transition temperature of decreased,its color gradually deepened,and its water solubility and water solution transparency became better at first and then tended to become worse;There was an enhancement in the hardness,water resistance and chemical resistance of the membrane,and its adhesion became stronger at first and then became weaker.The impact resistance seems to show no obvious change.