查询词典 rosin

Conjugated unsaturation of abietic resin acids can be removed through catalytic hydrogenation to overcome the shortcomings of oxidation and color degradation in rosin.

将松香催化加氢可去除枞酸型树脂酸的共轭不饱和性，克服其易于氧化变色的缺点。

This paper synthesizes the Cu(superscript 2+) schiff base complex of disproportionated rosin amine, and catalyzes urushiol oxypolymerization to polymer.

研究了歧化松香胺席夫碱－铜配合物的合成及其对漆酚氧化聚合反应的催化性能。

Rational reaction condition is that ratio of the Cu(superscript 2+) schiff base complex of disproportionated rosin amine is 3%, urushiol concentration is 68.8 g/L, the system of reaction reacts 36 h at 30℃ in alcohol dissolvent.

结果表明，氧化聚合反应的理想条件是以乙醇为溶剂，加入3%歧化松香胺席夫碱－铜配合物催化剂，漆酚浓度为0.0688g/ml，在30℃下反应36h后，漆酚聚合物的沉淀得率为51.3%。

XPS and FTIR spectroscopy analysis indicated that chemical bonds were formed between maleic rosin and wood flour through the esterification reaction of anhydride groups and hydroxyl groups on wood surface.

FTIR与XPS分析表明，马来松香分子中的酸酐基团与木粉表面的羟基发生了酯化反应，并且马来松香是以单酯的形式接枝到木粉表面，同时产生－游离羧基。

Resin is an important biomass resource in China. Abietic type resin acid is the main ingredient of rosin.

松香是我国重要的生物质资源，枞酸型树脂酸是松香的重要成分，它们的分离提纯及其衍生物的合成与生物活性研究对于开发松香深加工产品具有重要意义。

The kinetics of thermal oxidation of rosin and abietic acid absorbed on the polyethylene film were respectively studied.

设计了松香和枞酸在聚乙烯膜上的氧化反应器，建立了枞酸在聚乙烯膜上的紫外分光光度分析方法，跟踪测定了松香和枞酸氧化反应的过程。

The experimental results show that the thermal oxidation reaction of both rosin and abietic acid are pseudo first order reaction.

枞酸的氧化反应温度为30， 35， 40， 45， 50和55 ℃时，表观速率常数分别为0.0036， 0.0041， 0.0062， 0.0087， 0.011和0.0157 min-1，表观反应活化能Ea为50.29 kJ/mol。

Abietic acid was isolated from pine rosin in South China and its structure was identified bythe spectra of UV, IR, NMR and MS.

松香酸中共轭双键的选择性氧化或加成反应是一项非常有意义且具有挑战性的研究。

The kinetics of thermal oxidation of rosin and abietic acid absorbed on the polyethylene film were respectively studied. The kinetic equation of heat oxidation was determined by UV spectrophotometry.

设计了松香和枞酸在聚乙烯膜上的氧化反应器，建立了枞酸在聚乙烯膜上的紫外分光光度分析方法，跟踪测定了松香和枞酸氧化反应的过程。

Rosin acids ; isomerization ; abietic acid ; orthogonal experiment

松香树脂酸；异构；枞酸；正交实验

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。