Study on Curing Characteristics of Low-Toxicity Urea-Formaldehyde Resin

来源 :2010中国可再生能源科技发展大会 | 被引量 : 0次 | 上传用户:namezhu
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  Curing characteristics of low-toxicity urea-formaldehyde (UF) resin in different curing system are studied by differential scanning carlorimetry (DSC).Test results showed that the initial orterminal temperature and activation energy needed of curing reaction for low-toxicity UF resin was different in different curing system.The initial temperature of curing reaction for low-toxicity UF resin and activation energy is lowest, and exotherm is most under curing system C, which show the acceleration of curing system C on low-toxicity UF resin is best.The appropriate curing system can be optimized and applied for hot-press process in practical production by means of DSC to investigate curing characteristics of low-toxicity UF resin.
其他文献
建立太阳能-热泵中温沼气工程与烤烟生产、加工有机结合的现代工程示范;利用沼气替代煤或薪柴烤烟,引入自动控制系统调控烤烟房温度和湿度,提升烤烟质量,实现节能减排;建立烤烟专用有机复合肥生产线,利用沼液沼肥替代化肥、农药,生产高品质和无公害烟叶;从而提升烟草行业的整体水平和发展的可持续能力.
工业排放的重金属废水对生态环境和人类健康已造成严重危害.微生物法作为新型的重金属处理技术已被人类重视.为解决铅的低能排放问题,以实验室提供的对铅具有高耐受性、高吸附性的专利嗜铅菌,处理废水中的铅离子,分析了优势菌微生物法在低耗下处理含铅废水的条件及可行性,表明嗜铅菌节能排铅前景广阔.
针对传统的两电平光伏并网逆变器开关损耗大,直流电压利用率低,输出电流谐波含量高,无法实现高压、大功率和高质量的并网要求.本文采用了二极管箝位式三电平光伏并网拓扑结构,分析了其工作原理,详细的说明了空间矢量的调制方法.针对三电平逆变器直流侧中点电位不平衡问题,从空间矢量调制方法的角度出发,采用了一种只要检测各相电流和中点电压波动的方向,动态调整正、负小矢量作用时间来实现对中点电位平衡控制,从仿真和现
According to the UNs data, the greenhouse gas discharged by the global meat processing industry accounts for 18% of the total emissions, even more than that of transportation industry.In the meat free
Analyzed the present status and its technical limitations of groove push-pull ventilation emphatically.Proposed the conception of parallel airflow push-pull ventilation which hang on the theory of lim
Sodium dodecyl sulfate/Pd composites has been synthesized and used to modify the surface of Nafion membrane.The modified Nafion has been characterized by Fourier transform infrared spectroscopy (FTIR)
We calculated that there was excess heat of 0.178 W in the process of electrolyzing K2CO3 solution in Pt-K2CO3-Pd light water electrolysis system by investigating the variety of heat coefficient (k=ΔT
Using 1,4,7,10,13,16-Hexaoxacyclooctadecane as phase transfer catalyst, N,N-Diethylaniline is synthesized by reaction of aniline with bromoethane under atmospheric pressure.The factors affecting the y
Guizhou Province has very big coal reserves, which has middle to high sulfur content.It is of significance to study the feasibility of the desulphurization of high sulfur coal through float-and-sink t
Nowadays, in the HVAC design, the night radiation is not considered when calculating heating and cooling load.It is unsafe for heating load, especially for plateau region.Therefore, it selects Lhasa a