南京林业大学[018]

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1、南京林业大学本科毕业设计（论文）题目：硅烷改性聚氨酯密封胶的制备和性能学院：化学工程学院专业：化学工程与工艺（精细化工）学号：070203129学生姓名：周杰指导教师：蔡正春职称：讲师二O一一年五月二十八日17摘要：密封胶是用来填充空隙的材料，硅烷改性聚氨酯密封胶综合了硅酮密封胶和聚氨酯密封胶的性能。本文在已知的配方下，通过改变配方中不同实验原料及用量对产品性能的影响。主要研究单组分聚氨酯密封胶的固化速率、挤出性、触变性、胶体强度等性能。实验表明气相二氧化硅对聚氨酯密封胶无触变作用；在同等条件下选用邻苯二甲酸二辛酯作为增塑剂对密封胶的性能和

2、成本是最优的；催化剂用量在0.177%时表干时间最适宜；聚酰胺蜡对于体系的触变性最适宜用量在1.0~2.0%；增韧剂液体聚丁二烯橡胶对于体系无明显增韧作用；偶联剂甲基三甲氧基硅烷对于体系的粘结力有增强效果，在一定范围内，随着偶联剂甲基三甲氧基硅烷用量增加，剪切强度降低。关键词：硅烷改性聚氨酯；聚氨酯；密封胶17Abstract：Sealantisusedtofillgapsinthematerial，Silylatedpolyurethanesealantcombinationofsiliconesealantandpolyurethane

3、sealantperformance.Inthispaper,undertheknownformula,theformulabychangingtheamountofdifferentexperimentalmaterialsandtheimpactonproductperformance.Themainone-componentpolyurethanesealantcurerate,extrusionresistance,thixotropic,gelstrengthandotherproperties.Experimentsshowth

4、atthefumedsilicathixotropicontheroleofnon-polyurethanesealant;Underthesameconditionsuseddioctylphthalateasaplasticizerontheperformanceandcostofsealantisthebest;0.177%catalystinthedrytimewhenthemostappropriate;Polyamidethixotropicwaxforthesystemmostappropriateamountof1.0~2.

5、0%;Liquidpolybutadienerubbertougheningnosignificanttougheningeffectforthesystem;Methylsilanecouplingagentforthesystemcanenhancetheeffectofbondstrength,Withinacertainrange,withthecouplingagenttoincreasetheamountofmethyltrimethoxysilane,theshearstrengthdecreased.Keywords:Sil

6、ylatedpolyurethanePolyurethaneSealan朗读显示对应的拉丁字符的拼音字典17目录1.绪论·······································································································11.1硅烷封端聚氨酯密封胶的产品代表及发展·····································11.2国外聚氨酯胶粘剂的市场发展动态 ·······························

7、················21.3 国外聚氨酯胶粘剂的技术发展动态················································21.4有机硅、聚氨酯密封胶粘剂是今后发展的方向······························31.5建筑用聚氨酯密封胶的发展现状····················································41.6聚氨酯密封胶的应用····················································

8、·················51.7聚氨酯密封胶的分类···························································