正文完整版氧化铝.docx

聚酰亚胺/Al2O3杂化薄膜的制备与表征
摘要
本文以均苯四甲酸二酐（PMDA）和4,4’-二氨基二苯醚（ODA）为单体，以N,N’-二甲基二苯醚（DMAc）为溶剂，制备聚酰胺酸溶液。在此过程中，采用原位聚合法在酰胺酸溶液中加入氧化铝（Al2O3），通过热亚胺化处理制备得到氧化铝/聚酰亚胺（Al2O3/PI）杂化薄膜。用傅立叶变换衰减透射射红外光谱（ATR/FTIR）、静态热机械分析（TMA）、力学性能测试等手段对PI/Al2O3杂化薄膜结构和性能进行表征。
红外分析表明，杂化薄膜热亚胺化完全，杂化反应充分进行，并且Al2O3和PI基体之间形成键接；TMA分析表明，PI/Al2O3杂化薄膜的热膨胀系数随氧化铝含量的增加而减小；常温拉伸性能测试表明，随着Al2O3量的增加，PI杂化薄膜弹性模量逐渐增大，而拉伸强度和断裂伸长率呈下降趋势；玻璃化转变温度测试表明，杂化Al2O3之后的玻璃化温度不是很明显；热重分析表明，引入一定量的Al2O3，薄膜的热分解温度降低。而含有10wt%氧化铝的杂化薄膜各项性能都表现出相对优良的性能。

关键词：热固性聚酰亚胺薄膜氧化铝杂化原位聚合法
CharacterizationandPreparationofAlumina/PolyimideHybridFilms
Abstract
Thispaperuse4,4'-diaminodiphenylether(ODA)polymerizedwithpyromelliticaciddianhydride(PMDA)inN,N-dimethylacetamide(DMAc)producePI,andpolyimide-aluminahybridfilmswerepreparedbythesitupolymerizationreactionstartingfromAl2O3inthesolutionofpolyamicacidandAl2O3inorganicnano-particlesinpolyimide,followedbythermalimidization.ThehybridfilmswerecharacterizedbyATR/FTIR,ThermalMechanicalAnalysis(TMA),andMechanicalPropertyTest.
TheresultofATR/FTIRtestshowedthatthepolyamicacidfilmsconvertedintopolyimidefilmsabsolutely,andAl2O3wasconnectedwithPIbychemicalbondThecoefficientofthermalexpansionoftheAl2O3/PIhybridfilmsdecreasedwithincreasingthecontentoftheAl2O3.Themodulusofthehybridfilmsincreased,however,theelongationatfractureandthetensilestrengthdecreased.GlasstransitiontemperaturetestsshowedthattheadditionoftheAl2O3increasingcontentofthehybridfilmsmadelittleeffectontemperature.TGanalysisshowedthattheintroductionofacertainamountofAl2O3,helptoreducethefilmofpyrolysistemperature.However,withthe10percentofthealumina,thehybridfilmshaveshowthegoodperformancerelatively.

KeyWords:Thermosettingpolyimide;Film;Alumina;Hybrid;Situpolymerization目录TOC\o"1-3"\h\z\u
HYPERLINK\l"_Toc294599561"摘要 PAGEREF_Toc294599561\hI
HYPERLINK\l"_Toc294599562"Abstract PAGEREF_Toc294599562\hII
HYPERLINK\l"_Toc294599563"第一章文献综述 PAGEREF_Toc294599563\h1
HYPERLINK\l"_Toc294599564"1.1聚酰亚胺 PAGEREF_Toc294599564\h1
HYPERLINK\l"_Toc294599565"1