Preparation and membrane properties of epoxy cyclohexane adipate⁃modified water⁃soluble polyester

doi:10.19491/j.issn.1001-9278.2022.02.005

Abstract

Abstract:

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 ≤45 μm 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.

Key words: epoxy cyclohexane adipate, water soluble polyester, membrane property

CLC Number:

TQ328

DENG Qian, SUN Yiting, MA Zifei, LU Zhen, LYU Donghao, XIAO Bo, LI Jixin. Preparation and membrane properties of epoxy cyclohexane adipate⁃modified water⁃soluble polyester[J]. China Plastics, 2022, 36(2): 27-32.

Figures/Tables 10

References 15

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ACHD摩尔分数%	水溶液外观	最大溶解量/%	酸值/mg KOH·g^-1	特性黏度/dL·g^-1	黏均分子量
0	蓝色荧光透明溶液	35.05	9.48	0.301	7 066
2	淡蓝色荧光透明溶液	40.04	5.27	0.263	5 994
4	淡黄色透明溶液	35.12	7.07	0.289	6 724
6	淡黄色透明溶液	34.64	7.34	0.292	6 810
8	淡黄色半透明溶液	34.11	13.68	0.286	6 639

ACHD摩尔分数%	水溶液外观	最大溶解量/%	酸值/mg KOH·g^-1	特性黏度/dL·g^-1	黏均分子量
0	蓝色荧光透明溶液	35.05	9.48	0.301	7 066
2	淡蓝色荧光透明溶液	40.04	5.27	0.263	5 994
4	淡黄色透明溶液	35.12	7.07	0.289	6 724
6	淡黄色透明溶液	34.64	7.34	0.292	6 810
8	淡黄色半透明溶液	34.11	13.68	0.286	6 639

性能	ACHD摩尔分数/%
性能	0	2	4	6	8
涂膜外观	平整光滑	平整光滑	平整光滑	平整光滑	平整光滑
光泽度/Gu	98.8	100.1	97.6	101.9	97.1
铅笔硬度	HB	HB	HB	H	H
附着力/级	2	2	2	1	3
耐冲击/kg·cm	50	50	50	50	50
耐水性（48 h）	鼓泡，轻微泛白，铁片生锈	铁片轻微生锈	无异常	无异常	无异常
耐沸水性（100 ℃，0.5 h）	泛白，脱落	泛白	轻微泛白	无异常	无异常
吸水率（24 h）/%	20.6	18.9	13.1	10.6	8.7
耐醇性［5 %（体积分数）乙醇，1 h］	泛白	轻微泛白	无异常	无异常	无异常
耐酸性［5 %（体积分数）醋酸，1 h］	泛白	轻微泛白	无异常	无异常	无异常
耐碱性（50 g/L NaHCO₃，1 h）	无异常	无异常	无异常	无异常	无异常

性能	ACHD摩尔分数/%
性能	0	2	4	6	8
涂膜外观	平整光滑	平整光滑	平整光滑	平整光滑	平整光滑
光泽度/Gu	98.8	100.1	97.6	101.9	97.1
铅笔硬度	HB	HB	HB	H	H
附着力/级	2	2	2	1	3
耐冲击/kg·cm	50	50	50	50	50
耐水性（48 h）	鼓泡，轻微泛白，铁片生锈	铁片轻微生锈	无异常	无异常	无异常
耐沸水性（100 ℃，0.5 h）	泛白，脱落	泛白	轻微泛白	无异常	无异常
吸水率（24 h）/%	20.6	18.9	13.1	10.6	8.7
耐醇性［5 %（体积分数）乙醇，1 h］	泛白	轻微泛白	无异常	无异常	无异常
耐酸性［5 %（体积分数）醋酸，1 h］	泛白	轻微泛白	无异常	无异常	无异常
耐碱性（50 g/L NaHCO₃，1 h）	无异常	无异常	无异常	无异常	无异常

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