以聚醚多元醇、聚丙二醇(PPG)和2,4-甲苯二异氰酸酯(TDI)为原料,通过添加催化剂二月桂酸二丁基锡和扩链剂1,4-丁二醇制备了固化快、强度适中、延展性良好的聚氨酯电子封装胶。利用傅里叶变换红外光谱仪、热重分析仪分析了聚氨酯电子封装胶的结构和热稳定性能,考察了TDI与PPG摩尔比、聚醚多元醇与聚氨酯预聚体质量比、催化剂、扩链剂及其用量对聚氨酯电子封装胶力学性能及固化速率的影响。结果表明:在PPG相对分子质量为1000、n(TDI)∶n(PPG)=2∶1、m(聚醚多元醇)∶m(聚氨酯预聚体)=0.6、扩链剂1,4-丁二醇用量为3%时,聚氨酯电子封装胶的拉伸强度达到5.8MPa,断裂伸长率大于900%;催化剂二月桂酸二丁基锡用量为0.3%,固化时间小于40min时,聚氨酯电子封装胶耐热性能良好。
A kind of polyurethane electronic packaging adhesive with fast curing,moderate strength and good ductility was prepared.The main agent of the adhesive was prepared by polyether polyol and polyurethane prepolymer,which were produced by 2,4-tolylene diisocyanate(TDI) and polypropyleneglycol(PPG).Dibutyltin dilaurate was used as a catalyst,and 1,4-butanediol was used as a chain extender.This experiment explored that how the mechanical properties and curing rate of adhesive was influenced by the structure of polyurethane prepolymer,polyether polyols/polyurethane prepolymer component ratio,the catalyst and chain extender.The results showed that,when molecular weight of PPG was 1000,TDI∶PPG=2∶1,component m(polyether polyols)∶m(polyurethane prepolymer)=6∶10,the content of 1,4-butanediol was 3%,and the dosage of dibutyltin dilaurate was 0.3%,the elongation at break was greater than 900%,the tensile strength reached 5.8MPa.In addition,the curing time was no more than 40 minutes,and it had good heat resistance.
[1] 张俊良,付立成.电子产品用聚氨酯[J].化学推进剂与高分子材料,2013,11(4):1-8.
[2] 汤涛,张旭,许仲梓.电子封装材料的研究现状及趋势[J].南京工业大学学报:自然科学版,2010,32(4):105-110.
[3] 袁杰.柔性电子封装技术研究进展与展望[J].山东工业技术,2017(15):107;276.
[4] 马玉春,郑水蓉,孙曼灵,等.双组分聚氨酯灌封胶的合成及其性能表征[J].中国胶粘剂,2012,21(10):43-47.
[5] 刘翠平,赵雨花.HTPB/共聚醚型聚氨酯密封胶的研制[J].化工新型材料,2012,40(10):71-73.
[6] 张卿彦,唐淑贞,刘兴海.超支化多元醇对丁羟聚氨酯灌封胶力学性能影响的研究[J].化工新型材料,2017,45(11):73-75;79.
[7] 张立颖,吕虎,孙禹,等.聚氨酯丙烯酸酯预聚物的合成和性能测试[J].化学与黏合,2016,38(2):123-126.
[8] 尚尉,杨海涛,谢益民.封闭型聚氨酯预聚体的制备[J].造纸化学品,2011,23(S1):1-4.
[9] 曹大勇.聚氨酯预聚物制备及影响因素分析[J].当代化工,2009,38(3):306-308.
[10] 李晓明,张义新,冯辉霞,等.聚氨酯涂料研究现状及发展[J].应用化工,2010,39(7):1091-1095.
[11] 代青华,刘秀生,黄虹,等.聚氨酯预聚体黏度的影响因素探究[J].材料保护,2017,50(1):91-93.
[12] 郭焕,谭舸.溶剂对聚氨酯预聚体中异氰酸根含量测定的影响[J].聚氨酯工业,2014,29(3):44-46.
[13] 白天,薛刚,李坚辉,等.室温固化柔性环氧胶黏剂的制备研究[J].化学与黏合,2014,36(6):418-420;454.
[14] Giwook Sung,Jae Gyoung Gown,Jung Hyeun Kim.Characteristics of polyurethane adhesives with various uretonimine contents in isocyanine and average alcohol functionalities[J].Journal of Applied Polymer Science,2016,133(31):43737.
[15] 董丽荣,孟丹,田勇,等.提高聚氨酯胶黏剂固化速度的方法及可行性研究[J].信息记录材料,2017,18(7):40-41.
[16] 左常江,吕海金,董相军.二月桂酸二丁基锡催化合成不饱和聚酯涂料的新工艺研究[J].山东化工,2014,43(2):28-30;33.
[17] 张世磊,易玉华.低游离聚氨酯预聚体的结构、性能及其应用[J].陕西科技大学学报:自然科学版,2011,29(1):77-81.
[18] Sebastian Claus,Joseph Gabriel,Alexander Karbach,et al.Influence of the adhesive formulation on the mechanical properties and bonding performance of polyurethane prepolymers[J].Holzforschung,2011,65(6):835-844.
[19] 王晓青,贾云峰,孙超,等.反应型阻燃双组分聚氨酯胶粘剂的制备及性能[J].高分子材料科学与工程,2014,30(3):149-152.
[20] 辛浩波,马端人,潘光政.丙烯酸酯、环氧树脂对聚氨酯胶黏剂性能影响的研究[J].化工科技,2017,25(3):41-44.
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