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摘要
以甲苯二异氰酸酯(TDI)、聚丙二元醇(PPG)、2,2二羟甲基丙酸(DMPA)等为原料合成了聚氨酯预聚体,通过N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷(KH792)对聚氨酯预聚体进行双氨基扩链,之后中和乳化合成水性聚氨酯(WPU)胶黏剂。采用红外光谱对加KH792与未加KH792的水性聚氨酯结构进行表征,测试了加入不同量KH792的乳液流变、乳液粒径以及胶膜的吸水率和力学性能,采用热失重对乳胶膜的耐热性能进行分析。结果表明:随着KH792加入量增加,制得的水性聚氨酯乳液凝胶温度先增加后减小,乳液粒径变大,胶膜的吸水率降低;KH792用量为3%(wt,质量分数)条件下制得的水性聚氨酯胶膜的拉伸强度最高达到16.6MPa,断裂伸长率为490%,失重5%条件下分解温度达到268℃。
Abstract
A polyurethane prepolymer was synthesized from toluene diisocyanate(TDI),polypropylene glycol(PPG),2,2 dimethylolpropionic acid(DMPA) etc.as raw materials.Waterborne polyurethane (WPU) was synthesized by neutralizing and emulsifying the polyurethane prepolymer that was double-amino chain expanded using N-(β-aminoethyl)-γ-aminopropyl trimethoxy silane (KH792).The WPU structure of adding KH792 and not adding KH792 were characterized by infrared spectroscopy.The rheological properties of the emulsion with different amounts of KH792,the particle sizes of the emulsion,the water absorption and mechanical properties of the films were tested.The heat resistance of the latex films were analyzed by thermogravimetry.The results showed that the gel temperature of the emulsion by increasing the amount of KH792 was increased first and then decreased,the particle sizes of the emulsion became larger,and the water absorption of the films were decreased.The the highest tensile strength of latex film adding 3wt% KH792 was up to 16.6MPa,the elongation was 490%,and the decomposition temperature reached 268℃ when the weight loss was 5%.
关键词
水性聚氨酯
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无毒
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N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷(KH792)
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扩链
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性能
Key words
waterborne polyurethane
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non-toxic
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KH792
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chain extension
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performance
双氨基扩链型水性聚氨酯胶黏剂的合成[J].
化工新型材料, 2020, 48(1): 106-109 DOI:
[1] 肖林久,蔡政,刘冬雪,等.聚己内酯三醇型水性聚氨酯胶黏剂的合成及性能[J].化工新型材料,2015,43(2):71-74.
[2] Jeon H T,Jang M K,Kim B K,et al.Synthesis and characterizations of waterborne polyurethane-silica hybrids using sol-gel process[J].Colloids & Surfaces A Physicochemical & Engineering Aspects,2007,302(1/3):559-567.
[3] Cheng X,Chen Z,Shi T,et al.Synthesis and characterisation of core-shell LIPN-fluorine-containing polyacrylate latex[J].Colloids & Surfaces A Physicochemical & Engineering Aspects,2007,292(2):119-124.
[4] 刘文济.内交联型水性聚氨酯的合成与性能研究[D].广州:华南理工大学,2015.
[5] And J M,Painter P.A Comparison of hydrogen bonding and order in a polyurethane and poly(urethane-urea) and their blends with poly(ethylene glycol)[J].Macromolecules,2007,40(5):1546-1554.
[6] 张志国,姜绪宝,朱晓丽,等.聚氨酯改性用有机硅的种类及其改性机理[J].济南大学学报(自然科学版),2007,21(3):200-204.
[7] 李喜龙,周向东,张军军,等.有机硅改性水性聚氨酯增深剂的合成及应用[J].印染助剂,2013,30(4):26-30.
[8] 周月姣,杨建军,张建安,等.水性聚氨酯耐热改性的研究进展[J].现代涂料与涂装,2011,14(10):24-27.
[9] 张军瑞.高性能透明聚氨酯涂层的制备、结构与性能关系研究[D].广州:华南理工大学,2013.
[10] 陆杰,陈新泰,尹应乐,等.铂催化剂对液体硅橡胶性能的影响研究[J].化工新型材料,2016,44(6):217-219.
[11] 王洁.纳米纤维素的可控制备及其对水性聚氨酯的增强作用[D].长沙:中南林业科技大学,2015.
[12] 王亮.聚碳酸亚丙酯型水性聚氨酯材料的合成[D].广州:广东工业大学,2015.
[13] 王宇奇,葛硕硕,张萍波,等.大豆油基多元醇改性水性聚氨酯胶黏剂的制备及性能研究[J].化工新型材料,2016,44(10):191-193.
基金资助
辽宁省重点研发计划指导计划项目(2017304004)
