酚醛树脂

The results showed that the PFR resin could cover equably on the surface of the graphite powders by in-situ polymerization.

实验结果表明：采用原位合成法，酚醛树脂能均匀地覆盖在石墨粉表面；石墨、树脂种类及含量、成型压力等是影响炭素材料性能的重要因素。

The chemical modification and physical modification of phenolic resin are introduced roundly in recent years, and their effects on friction performance of brake pad are also discussed.

全面介绍了近年来常用的几种化学和物理改性酚醛树脂方法，以及对刹车片摩擦材料性能的影响。

The influence of different synthetic procedures of novolac on gelation speed and softing point was investigated.

研究了不同合成工艺对壳法用热塑性酚醛树脂聚合速度和软化点的影响。

Results show that glass fiber cloth laminate exhibited improved mechanical properties, which can be maintained even at high temperature of 150℃, with respect to conventional phenolic laminate.

结果表明，玻璃纤维布层压板的力学性能比普通酚醛树脂层压板有明显提高，在大于150℃高温下其性能仍能较好保持。

In this paper,the granite polishing abrasive tools are developed and manufactured by hot-pressing,in which powder phenolic resin is used as bond and a few soft materials are used as abrasives.

研制了一种花岗石抛光磨具，该磨具采用粉末酚醛树脂作结合剂和几种软磨料复配混合热压而成。

It was demonstrated that cuticles of some animals such as dung beetle and ground beetle, display the varied non-smooth or textured morphologies, For examples, the convex domes, dimpled or scaly form morphologies.

设计并制备了七种分布的凸包型非光滑表面，在JFY50型热压机上通过热压成型的方法制备了轻质碳酸钙填充酚醛树脂基复合材料凸包结构，并通过粘接方法将凸包固定在45钢底板上，制备了凸包型仿生非光滑表面试样。

With oxalic acid and hexamethylenetetramine as the catalysts, and phenolic resin and tetraethoxysilane as the starting materials, a two-step sol-gel processing is developed for preparing Si〓N〓/SiC precursors with homogeneous microstructure composed of nanometer sized particles.

用草酸和六次甲基四胺为催化剂，酚醛树脂和正硅酸乙脂为原料，探索出了制备结构均匀而精细的Si〓N〓／SiC前驱体的溶胶—凝胶两步法。

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

Some moisture content can improve the penetrability of the compound impregnant in heartwood of Chinese fir.

在较低蒙脱土质量分数下，杉木/蒙脱土纳米插层复合材的吸湿性、吸水性、尺寸稳定性、抗水流失性、顺纹抗压强度、耐磨性、氧指数等性能均较酚醛树脂浸渍木有一定提高。

Grinding the coal powder mixed with a few linotype phenol - formaldehyde resins, the surface of the coal powder was modified by the meehanoehemical effect during ball milling.

在神府煤粉中加入少量线型酚醛树脂后在行星球磨上进行混合球磨，利用球磨过程中的力化学作用对煤粉进行表面改性，用傅立叶变换红外光谱、热重分析仪和激光粒度分布仪等对改性后煤粉进行了表征。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。