標題: 蒙特納石/環氧樹脂奈米複合材料之反應動力學與性質
Reaction Kinetics and Characterization of Montmorillonite/Epoxy nanocomposites
作者: 李政道
Tsung-dao Lee
韋光華
Kung-Hwa Wei
材料科學與工程學系
關鍵字: 有機蒙特納石;奈米複合材料;organo montmonrillonite;nanocomposites
公開日期: 1999
摘要: 本研究利用已酸化不同種類的有機單體或預聚合物與Na+-蒙特納石(Na-montmonrillonite)進行陽離子交換反應形成有機蒙特納石(organo montmonrillonite),針對有機單體的選擇包括12-aminocarboxylic acids(12COOH)、p-phenylenediamine(PPD)、4,4’-Diaminodiphenyl sulfone(DDS)、4,4’-Diaminodiphenyl sulfide(ASD)和α,ω-Amino-organofunctional Polydiethylsiloxane(SI)等研究有機蒙特納石極性、層間距,與環氧樹脂的硬化反應,基本物性和熱性質,同時探討不同功能的有機蒙特納石對有機蒙特納石/環氧樹脂奈米複合材料物性之影響。
以熱分析對環氧樹脂硬化反應的動力學研究,可得到有機蒙特納石的反應活性、反應活化能等均深受膨潤劑種類與Na+-蒙特納石陽離子取代率、層間距離及環氧樹脂與有機蒙特石的膨潤量所共同決定,而硬化反應的活化能會隨著添加有機蒙特納石的量的增加而降低,最大可達21﹪;而隨著有機蒙特納石的添加,可增快反應速率,縮短反應時間。
添加5wt%有機蒙特納石的奈米複合材料,其玻璃轉換溫度和未添加有機蒙特納石純的環氧樹脂/硬化劑組成相比較,最大可增加24℃;在機械性質方面,抗張強度的楊氏模數可提昇44﹪以上,而抗曲強度的楊氏模數則可提昇36以上。
This study involved the reaction of swelling-agent-modified montmorillonite in the curing reaction of Epoxy and the exfoliated Montmorillonite/Epoxy nanocomposites.
This thesis involved a study of the curing reaction kinetics of swelling-agent-modified montmorillonite in Epoxy and a characterization of the thermal and mechanical properties of exfoliated montmorillonite/Epoxy nanocomposites. The exfoliated structure of MMT/Epoxy were confirmed by WAXD and TEM studies. The swelling agents used included 12-aminocarboxylic acids(12COOH)、p-phenylenediamine(PPD)、4,4’-Diaminodiphenyl sulfone(DDS)、4,4’-Diaminodiphenyl sulfide(ASD) andα,ω-Amino-organofunctional Polydiethylsiloxane(SI).
It was found that the activation energy of the curing reaction of the curing reaction of Epoxy decrease with the increasing amount of ASD-MMT with a maximum reduction of 21﹪. The glass transition temperature of 5/95 Montmorillonite/Epoxy increased 24℃ as compared to that of pure Epoxy cured by 4,4’-Diaminodiphenyl sulfone(DDS). The Young’s modulus and the flexural modulus of 5/95 Montmorillonite /Epoxy were 44﹪and 36﹪higher than that of pure Epoxy cured by DDS.
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT880159046
http://hdl.handle.net/11536/65320
Appears in Collections:Thesis