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摘要
为改善湿固化聚氨酯热熔胶(PUR)的热稳定性及耐水性,减少湿固化过程中CO2气体的释放,提高其粘接性能,利用异氰酸酯基丙基三乙氧基硅烷(IPTS)改性PUR,得到硅烷封端改性PUR(SPUR)。结果表明,IPTS能够在不大幅增大SPUR黏度的情况下,有效地提高了粘接强度;随着硅烷封端率的增大,开放时间逐渐减小,剪切强度呈先升后降的趋势,并在硅烷封端率为20%时达到最大为13.54MPa,SPUR较未改性的PUR耐水性及耐热性有较明显提升。
Abstract
In order to improve the thermal stability and water resistance of wet-cured polyurethane hot melt adhesive (PUR),reduce the release of CO2 gas in the process of wet-curing and improve its bonding performance,the PUR was modified by 3-isocyanato-propyltriethoxysilane(IPTS).The results shown that IPTS can effectively improve the bonding strength without significantly increasing the viscosity of SPUR.With the increase of silane end-capping ratio,the opening time decreased gradually,and the shear strength increasing firstly and then decreasing.The maximum value of IPTS was 13.54MPa when the silane end-capping ratio was 20%.SPUR had a significant improvement in water resistance and heat resistance compared to unmodified PUR.
关键词
硅烷封端改性聚氨酯热熔胶
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封端率
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开放时间
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熔融黏度
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剪切强度
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耐水性
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耐热性
Key words
SPUR
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capping rate
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open time
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melt viscosity
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shear strength
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water resistance
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heat resistance
异氰酸酯基硅烷改性湿固化聚氨酯热熔胶的研究[J].
化工新型材料, 2021, 49(9): 144-146 DOI:10.19817/j.cnki.issn 1006-3536.2021.09.031
[1] 曹盛.湿固化聚氨酯热熔胶的制备与改性研究[D].上海:华东理工大学,2016.
[2] 赵飞.湿固化聚氨酯热熔胶发展近况[J].中国胶粘剂,2004(2):54-59.
[3] 高洁,曹有名.硅烷Y9669改性湿固化聚氨酯热熔胶的研制[J].中国胶粘剂,2013,22(3):39-42.
[4] 张于弛.硅烷偶联剂改性湿固化聚氨酯热熔胶的性能研究[J].聚氨酯工业,2016,31(1):37-39.
[5] 徐新辉,邹斌,林中祥.耐老化型湿固化聚氨酯热熔胶的研究及性能表征[J].中国胶粘剂,2016(11):37-39.
[6] 樊永伟.反应型聚氨酯胶粘剂的合成及应用[D].大连:大连工业大学,2015.
[7] 周华利,姜胜男,林敏明,等.有机硅改性端异氰酸酯基聚氨酯阻燃涂料的研制[J].塑料制造,2011(6):80-82.
[8] 田俊玲,雷周桥.电子行业用湿固化聚氨酯热熔胶的制备及性能研究[J].广东化工,2017,44(11):82-83.
[9] 肖家伟,于俊荣,陈蕾,等.环氧树脂/有机硅双重改性水性聚氨酯胶粘剂的合成及性能研究[J].化工新型材料,2013,41(10):92-94,100.
[10] 樊永伟.反应型聚氨酯胶粘剂的合成及应用[D].大连:大连工业大学,2015.
[11] 周志华.中国聚氨酯工业协会第十二次年会论文集[C].北京:中国聚氨酯工业协会,2004.
[12] 高立俊.单组分湿固化聚氨酯胶粘剂的合成、改性及性能研究[D].广州:广东工业大学,2013.
[13] 孙鸿斌.高初粘性聚氨酯热熔胶的制备技术研究[D].济南:齐鲁工业大学,2015.
[14] 徐四喜.有机硅改性聚脲/聚氨酯的设计、合成与性能研究[D].武汉:武汉大学,2015.
