酚醛树脂

Benzylic ether phenolic resin is one of the main components of foundry polyurethane binder; its structure and preparation condition determine the performances of polyurethane binder.

苯醚型酚醛树脂是铸造用聚氨酯粘合剂的主要成份之一，它的结构及合成工艺条件决定了该类粘合剂性能。

Phenol is an important chemical in industry, as an intermediate for biphenol A, phenol-aldehyde resins, nylon-6, etc.

苯酚是重要的化工原料，它是制双酚A、酚醛树脂、尼龙—6及其它许多化合物的前驱体，因此工业需求量非常大。

Too high allyl contents are unfavorable in that a high BMI proportion will be required to copolymerize with the allylated Novolak resin.

为了协调好工艺性、耐热性与T〓三者之间的矛盾，获得综合性能优良的改性酚醛树脂体系，应通过控制投料比将Novolak树脂的烯丙基化程度控制在25％左右。

With the rapid development of chemical industry, it has been used in many areas, such as in manufacturing phenolic resin, diacetic acid, diethylamine, chemical herbicides, synthetic dye, medicine, wood preservatives and dynamite, etc.

它的用途非常广泛，利用苯酚可以制造酚醛树脂、乙二酸、己二胺、化学除草剂、合成染料、药物、炸药、木材(来源：f9f9ABC论文网www.abclunwen.com)防腐剂等。

Phenolic melamine, novolak, and dicyanodiamide were used as curing agents to prepare the thermoset resins with the control and the phosphate-based epoxy resins. Thermal properties and thermal degradation behavior of these thermoset resins were investigated by using differential scanning calorimetry and thermo gravimetric analysis.

以双氰胺、苯酚三聚氰胺、酚醛树脂为固化剂制备了一系列含磷环氧树脂的固化体系，差示扫描量热法和热失重分析表明，这些热固性树脂具有优异的热性能和热稳定性。

Being Compared contact angle changes of various adhesives on different surface of Moso bamboo and Chinese fir with the coefficients of penetrability, it was found that wettiability of polymeric diphenylmethane diisocyanate adhesive was much better than emulsion polymer isocyanate adhesive, wettiability of phenol-formaldehyde adhesive and urea-formaldehyde adhesive were in the middle of above two adhesives.

通过研究不同胶粘剂在毛竹表面的接触角变化，并结合胶粘剂渗透扩散系数，发现聚异氰酸酯胶在竹材表面的润湿性较好，而双组分乳液型聚异氰酸酯胶的表面润湿性较差，酚醛树脂胶和脲醛树脂胶润湿能力处于二者中间。

Characterization results showed that the silica coat of modified carborundum was the evenest as pH=10 in the sodium silicate solution, and at the time the measured value of hydrophile was the highest.Besides, the interface between phenolic resin and modifie...

结果表明，陶瓷液pH=10时所得的碳化硅颗粒陶瓷涂层最为均匀，陶瓷涂覆的碳化硅颗粒的亲水性最好，碳化硅与酚醛树脂的润湿性不如改性的碳化硅颗粒的好。

For the Chinese fir WMNC with a low content of MMT, the properties including humidity and water adsorption, dimensional stability, water-leaching resistance, longitudinal compression strength, abrasion resistance and oxygen index are all improved compared with PF impreg.

由于单纯酚醛树脂浸渍处理对杉木性能的改善作用已较显著，而且蒙脱土在WMNC复合材中的质量分数太小（＜3%），WMNC的纳米复合效应并不显著。

DSC curve revealed two curing peaks,of which one at around 150℃ was attributed to the condensation reaction of methylol groups formed in minor quantities on the phenyl rings,and the other at around 250℃ was attributed to the addition curing reaction of the maleimide groups.

利用DSC和TGA研究了 N -苯基马来酰亚胺改性酚醛树脂的固化特性和耐热性能，发现PPMF树脂经历了两个固化阶段，第一阶段是少量羟甲基的缩合，第二阶段为马来酰亚胺的双键打开自交联形成。

When the carbon microsphere s are graphitized under the protection of Ar at 2100～2600℃,closed-cell carbon microspheric form of graphitic structure is produced.

依据微胶囊化原理，用热固性线型酚醛树脂制得微胶囊，加热去除囊芯后用作先驱体，在N2保护下进行900~1100℃的碳化处理得到具有无定型碳结构的闭孔碳微球，然后在Ar气保护下进行2100~2600℃的石墨化处理，得到具有石墨结构的闭孔微球碳泡沫材料。

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。