The condensation mechanism of resin is analyzed and the technological properties of resin sand is determined. 探讨了该树脂砂的缩合机理,并测定了树脂砂的各项性能。
A model was set up to determine the termination of the condensation of PSF resin. 研究了聚砜树脂的缩聚终点控制模型。
The efficiency of fragment condensation on these resins was tested through the synthesis of glucagon. The results showed that the former resin is the better one. 作者通过对固相片段缩合法合成胰高血糖素过程的分析,对这两种树脂的接肽性能进行了比较,结果表明表层树脂对大肽片段缩合更为有利。
1,1-Diphenylethane was synthesized through the condensation of benzene with acetaldehyde using macroporous perfluorosulfonic acid resin as the catalyst. The synthetic, when formulated with benzyl toluene, produced a kind of capacitor oil with physical chemical properties and electric performance comparable to that of SAS-40 made in Japan. 采用大孔全氟磺酸树脂作催化剂,苯与乙醛缩合生成1,1-二苯基乙烷,后者与单苄基甲苯掺配的油的理化电气性能与日本SAS-40油相同。
Studies on the method of solid phase fragment condensation& preparation and comparison of two kinds of thin layer resin 固相多肽片段缩合方法的研究&两种表层型树脂的制备及接肽效能
As the result of thermal pyrolysis and condensation, the contents of asphaltene and saturates increased, the aromatic content decreased, and the resin content only changed a little. 结果表明,在热反应中,由于裂解和缩聚反应的共同作用,使渣油的沥青质和饱和分含量上升,芳香分含量下降,胶质含量变化不大;
The kinetics study in flow system of acetone condensation reaction on basic ion exchange resin catalyst 离子交换树脂催化丙酮缩合反应动力学研究
A novel heat-resisting modified epoxy resin was synthesized through the condensation of a hydroxy terminated poly ( methylphenylsiloxane), PMPS, and a bisphenol A epoxy resin, EP. The mechanism of the dehydration condensation reaction of PMPS and EP had been explored. 用羟基封端的聚甲基苯基硅氧烷(PMPS),经脱水缩合反应,对双酚A型环氧树脂进行改性,得到一种相容性好、内应力低的新型耐热环氧树脂。
In condensation polymerization process of PCF resin, it was non-linear relations between rising rate of molecular weight and rising rate of viscocity. PCF树脂在缩聚过程中,分子量增长速度与粘度增长速度不呈线性关系。
Study the flame-retardation of the melamine salt and the ammoniums salt of the condensation polymers of the phosphoric acid and pentaerythritol on the cured epoxy resin 磷酸季戊四醇缩聚物铵盐和三聚氰胺盐对环氧树脂的阻燃研究
Study of hydrolysis and condensation mechanisms of a silane coupling agent γ-MPS used for dental composite resin 复合树脂中硅烷偶联剂γ-MPS水解与缩合机制的研究
In this paper, polymer structures of furfuryl alcohol, condensation reactions of furfuryl alcohol and urea formaldehyde, and the structures of the chain elements of the urea furan resin were investigated. 从呋喃树脂合成过程的特点出发,结合波谱分析,对呋喃脲醛树脂中糠醇的聚合态、糠醇与脲醛的缩合方式以及树脂的主要链节结构组成进行了分析和推断。
The result shows that in the last stage of condensation polymerization, MUF resin with stable property can be made up by adding MF resin, and it's easy to control the preparation stage. 结果表明:在缩聚反应的后阶段加入三聚氰胺制得的MUF树脂,其性能稳定,且制备过程易于控制。
The interpenetrating polymer network ( IPN) of urushiol formaldehyde condensation polymer ( UF) and alkyd resin ( AR) has been prepared. Its physico-mechanical properties, solvent resistance, resistance to ultraviolet ray and dynamic mechanical properties have been also studied. 本文制备了漆酚缩甲醛聚合物(UF)与醇酸树脂(AR)组成的同步互穿网络共混物,并对共混物涂膜的物理机械性能,抗溶剂性能和动态力学性能进行了研究。
Adding the PQ additive with 2 times, to the addition condensation reaction of urea with formaldehyde, can reduce the content of free CH 2O and increase stability of UF resin adhesive. 在尿素与甲醛加成-缩合反应中,分2次加入自制PQ复合添加剂,可明显降低游离甲醛的含量,提高脲醛树脂胶粘剂(UF胶)的稳定性。
The reasons for the condensation products created in the production of acrylic resin finish emulsion, have been analyzed and investigated. 本文对丙烯酸树脂乳液涂饰剂生产过程中产生凝聚物的原因进行分析探讨。
Cardanolaldehyde condensation resin ( CF) is susceptible to corrosion by alkali because of its slight acidity of phenolic hydroxyls. 腰果酚醛树脂中含有较活泼的酚羟基,略显酸性,易受碱的腐蚀。
Report on Condensation Resin of Melamine-Urea Formaldehyde 三聚氰胺脲醛共缩合树脂试验报告
A heat-resistant modified epoxy resin with good mechanical properties is prepared by condensation polymerization of epoxy resin ( E44) and silicone intermediate. The influences of catalyst, stoichiometric composition, reaction temperature and time on the properties of production are investigated. 用有机硅活性中间体对环氧树脂E44进行接枝共聚改性,得到一种具有良好耐热性和机械性能的新型改性树脂,研究了催化剂种类、原料配比、反应温度和时间对产物的影响。
Relationship between the reactivity of a phenolic compound in condensation reaction for phenolic resin and~ ( 13) C chemical shift on the benzene ring 酚单体反应活性与苯环碳原子化学位移的关系
The effects of different factors on the end-product were studied, the results showed the acid content and the time of second condensation had effects mainly on the softening point of the resin; 研究了各种因素对最终产品的影响,结果表明:加酸量和二次缩合时间主要影响树脂软化点;
And then by condensation, drying, resin was prepared to MIS. 再经凝聚、干燥得到MIS树脂。
The result of the infrared spectrum anlysis showed that the phenolic hydroxyl group reacted with the epoxy group and the condensation reaction was occurred between the methyl groups of phenolic resin. 红外光谱分析表明,导电胶在发生固化反应的过程中,酚醛树脂的酚羟基与环氧树脂的环氧基发生了反应,同时,酚醛树脂的羟甲基间也发生了缩合反应。
The simple terms of "addition" and "condensation" are not enough to illustrate the mechanisms of PF resin formation. 简单的加成、缩合并不能够解释的酚醛树脂的合成机理。
Mannich condensation product, also known as phenolic amines, can cure epoxy resin at room temperature and humid environment. It occupies an important position among the brands of the room or low temperature curing agent. Mannich缩合的产物又称酚醛胺,它具有能在低温、潮湿环境下固化环氧树脂的优点,在室温、低温环氧树脂固化剂品牌中占有重要的位置,同时酚醛胺也广泛应用于重防腐行业。