An excellent adhesive was prepared from bismaleimide ( bmi ), epoxy resin ( e - 51 and tde - 85 ), 4, 4 ' - diaminodiphenyl sulfone ( dds ) in this thesis. the influence of liquid rubber and polymer ether imide ( pei ) on the properties ( especially high - temperature strength and the peeling strength ) were discussed, their different toughening characteristics and mechanisms were discussed. last, the process and effection of heat - resisted structural adhesive were studied by adhesive experiment of synchronizer in automobile. the results of investigation made clear : the adhesive, has good properties, especially heat - resisted properity
根據材料分子設計的原理,研究了二苯甲烷雙馬來酰亞胺( bmi ) 4 , 4 』 ?二胺基二苯基碸( dds ) e ? 51 tde ? 85組成的環氧膠粘劑體系,研究該體系在作為高溫結構膠粘劑使用時的粘接性能;然後研究了用無規
羧基液體丁腈橡膠( ctbn ? x )和聚醚酰亞胺( pei )分別來增韌該體系的增韌效果;最後通過
碳纖維耐磨材料與同步器圓錐環的粘接實驗,研究了耐高溫結構膠粘劑的粘接工藝和使用效果。
Dispersal of ultra - fine ground calcium carbonate with poly - carboxylic salt dispersant
聚
羧酸鈉鹽分散劑分散超細重質
碳酸鈣的探討
This paper designs molecular structure of organic water - repellent admixture. we choose carboxylic acid that possesses amphiphilic molecular structure and sodium carbonate and potassium hydroxide as important raw materials. they carry through soaps turns reaction to synthesize polycarboxylic acid type waterproofing agent
本文通過對有機質防水劑分子結構設計,選擇具有兩親結構的
羧酸(酸a 、酸b ) 、無水
碳酸鈉、氫氧化鉀為主要原材料,通過皂化反應,合成多元
羧酸系防水劑。
The reaction pathways were proposed as follows : firstly, hydroxylation of aromatic ring, then ring cleavage forming dicarboxylic acid and eventually oxidation to inorganic carbon
其機理為:首先是苯環羥基化,然後環破裂生成二元
羧酸,最後二元
羧酸氧化降解為二氧化
碳和水。
Measurement to a series of organic vapors indicated that the films possessed fine response properties to carboxyl acid vapors
通過對多種有機蒸氣的測量后發現,摻胺
碳膜對
羧酸類物質具有優良的選擇性響應。
The first - principles calcultion of the electronic structure of finite length carbon nanotubes grafted by carboxyl
接枝
羧基的有限長
碳納米管電子結構的第一性原理研究
Methods of sampling and test for carbonaceous materials used in aluminium manufacture - electrodes - carboxy reactivity of prebaked anodes - determination of the reactivity by a loss in mass method - sec 3. 8 carboxy reactivity of prebaked anodes subsec 3. 8. 1 determination of the reactivity buy a loss in mass method
制鋁工業用
碳素材料的取樣與試驗方法.電極用焦炭.預焙陽極的
羧基反應性.通過質量損失法測定反應性
Methods of sampling and test for carbonaceous materials used in aluminium manufacture - electrode coke - carboxy reactivity of calcined coke - determination of the reactivity by a loss in mass method - section 2. 20 : carboxy reactivity of calcined coke subsection 2. 20. 1 : determination of the reactivity by a loss in mass method
制鋁工業用
碳素材料的取樣與試驗方法.電極用焦炭.煅燒焦炭的
羧基反應性.通過質量損失法測定反應性
When change the component of adhesive its shear strength increased from 39. 3 mpa to 53. 5 mpa at room temperature and it have long - term usage at 180 with 25 mpa and can be served at 230 in short period. the addition of liquid rubber resulted in a 300 % increase in the peeling strength. the addition of polymer ether imide led to a 260 % increase in the peeling strength, a 15 % increase in shear strength and a 10 increase in tg ( tg = 195. 54 )
研究結果表明: bmi dds e ? 51 tde ? 85組成的膠粘劑體系的室溫剪切強度為39 . 3mpa ,當改變環氧樹脂的含量時,剪切強度提高到53 . 5mpa ;用無規
羧基液體丁腈橡膠改性環氧樹脂膠粘劑時室溫剝離強度提高3 . 0倍;用聚醚酰亞胺改性環氧樹脂膠粘劑,室溫剪切強度最高可達45 . 2mpa ,剝離強度提高2 . 6倍,玻璃化轉變溫度tg = 195 . 54 ,比未增韌體系提高10以上;
碳纖維耐磨材料與同步器圓錐環的粘接實驗結果表明,膠粘劑的使用工藝性能良好,滿足室溫剪切強度30mpa和180剪切強度12 . 5mpa的技術要求。
The symmetric structure of oxalic acid molecule and two carboxylic group on both ends ensure the stableness of c = c double bond
草酸分子屬于對稱結構,兩端的
羧基使兩個
碳原子穩定化。
Investigation on the effects of nitric acid treatment on carboxyl groups in multi - wall carbon nanotubes
多壁
碳納米管的
羧基修飾
Study on the electrochemical behavior of 2 - nitrophenol at the sodium montmorillonite modified carbon paste electrode
吡啶二羧酸修飾玻碳電極上的電化學行為