Tribenuron-methyl is synthesized via ring-opening reaction, phosgenation and condensation.
经过开环、光气化、缩合等一系列反应制备了苯磺隆。
Polylactic acid synthesis in two major ways:direct polymerization and lactate lactide ring-opening polymerization.
聚乳酸的合成方法主要有两种：乳酸直接聚合和丙交酯开环聚合。
In order to improve the performance of epoxy resin E-44, it was modified with silica sol through direct ring-opening reaction.
采用硅溶胶与环氧树脂e - 44直接开环反应的合成方法改进环氧树脂的性能。
Poly(L-lactide)(PLLA) was synthesized by ring-opening polymerization of L-lactide using cyclic tin alkoxide compound as initiator.
以环烷氧锡化合物引发L-丙交酯开环聚合制备高分子量聚L-乳酸。
There are two main methods to synthesis PLA, condensation polymerization of lactic acid and ring-opening polymerization of lactide.
聚乳酸的合成主要有两种方法：乳酸直接缩聚和丙交酯的开环聚合。
In addition, high reactivity with various nucleophiles leads to high regioselective and trans-stereospecific ring-opening products.
另外，各类亲核试剂对环氧的开环得到了区域选择性和反式的立体选择性都较高的开环产物。
High molecular weight linear products were regenerated after the ring-opening polymerization of the cyclo-products using potassium phenoxide as initiator.
环状产物又在阴离子引发剂联苯双酚钾的作用下进行开环聚合重新得到高分子量的线性产物。
A new type of friction material has been prepared with carbon fiber and steel fiber as reinforcements and ring-opening polymerized phenolic as matrix resin.
采用碳纤维和钢纤维为增强材料、开环聚合酚醛树脂为基体，制得新型摩阻材料。
The new polymer quaternary ammonium salt was synthesized from epoxy phenolic resin via ring-opening reaction with aqueous solution of triethylamine hydrochloride.
利用三乙胺盐酸盐与酚醛环氧树脂进行开环反应合成了酚醛环氧树脂季铵盐。
Using sodium dicyandiamide and saccharin as raw materials, tribenuron-methyl is synthesized via ring-opening reaction, phosgenation and condensation with total yield of 57.
以双氰胺钠和糖精为起始原料，经过开环、光气化、缩合等一系列反应制备了苯磺隆，合成反应的总收率可达57。
Polydicyclopentadiene (PDCPD) is a novel engineering material synthesized by reaction injection molding (RIM) method and such reaction mechanism is ring-opening metathesis polymerization.
聚双环戊二烯是采用反应注射成型工艺合成的一种性能优良的新型工程材料，是通过开环易位机理形成的聚合物。
Polytetrahydrofuran (PTHF) with narrow molecular mass distribution was prepared by cationic ring-opening polymerization of tetrahydrofuran using H_2SO_4 · SO_3-HClO_4 system as a catalyst.
以发烟硫酸-高氯酸为催化剂，通过四氢呋喃的阳离子开环聚合合成了窄分子量分布的聚四氢呋喃(PTHF)。
Disclosed is a means for producing lactide efficiently in the production of a poly(lactic acid) by depolymerizing a lactic acid oligomer to produce lactide and ring-opening-polymerizing lactide.
本发明在对乳酸低聚物进行解聚并对得到的丙交酯进行开环聚合的聚乳酸的制造中，提供一种高效地得到丙交酯的方法。
The Ring-opening polymerization(ROP) of D-lactide(D-LA) catalyzed by bifunctional thiourea catalyst has been studied by performing density functional theory calculations at the B3LYP/6-31G(d) level.
用密度泛函理论在B3LYP/6-31G（d）水平上研究了双官能团硫脲催化丙交酯开环聚合反应的微观机理。
Results showed that imidazoline was hydrolyzed to amide by ring opening reaction under high temperature.
试验结果表明，高温条件下，咪唑啉发生开环反应，生成了酰胺类物质。
Figure 7... Several monomers for cationic ring... opening polymerization.
图7…几种阳离子开环聚合的单体。
Synthetic reactions of hyperbranched polymers included condensation reaction, addition reaction, ring - opening reaction, grafting reaction, etc.
超支化聚合物的合成反应主要有缩聚反应、加成反应、开环聚合、接枝反应等。
This article reviews the ring opening reaction of five membered nitrogen containing heterocyclic compounds.
综述了近年来各种五元氮杂环的开环反应及其在有机合成中的应用。
There are two main methods to synthesis PLA, ring - opening polymerization of lactide and condensation polymerization of lactic acid.
聚乳酸的合成主要有两种方法：丙交酯的开环聚合和乳酸直接缩聚。
The degree of hydrocarbon evolution increases with depth, which is accompanied by demethylation of alkanes, ring opening of cycloalkanes, aromatization and heightening alkylating degree.
随着演化程度加深，链烷烃脱甲基、环烷烃开环作用、芳构化作用和烷基化程度不断提高。
The hydrogenation saturation of aromatics and selective ring opening of cycloalkane were the most important process during deep dearomatization of diesel oil.
单环芳烃的加氢饱和与环烷烃的选择开环是柴油深度脱芳过程中的重要反应。
Low acid value resins were synthesized by E10 with low temperature ring opening.
采用E10低温开环酯化合成低酸值树脂。
This paper reviews briefly recent developments in the regio and stereoselective ring opening of 2, 3 epoxy alcohols and their derivatives by a variety of methods.
简要综述了对2,3 -环氧醇及其衍生物进行区域及立体选择性开环的各种方法的近期进展。
The synthesis of oxyethylene oxypropylene copolyethers used for quenchant was studied by using anionic ring opening polymerization, diol or triol as the starting agent and KOH as the catalyst.
研究了以KOH为催化剂，二元或三元醇为起始剂，采用阴离子开环聚合合成淬火剂用共聚醚。 结果表明：产物的分子量随起始剂和杂质量的减少而增加；
It was found that the ring opening polymerizations of epoxide based monomers with THEIC can be carried out in a heterogeneous medium smoothly.
发现THEIC与环氧单体可在非均相体系中平稳地进行阳离子开环聚合反应。
Dimethyldiphenyl RTV silicone rubber with low phenyl contents was synthesized by ring opening copolymerization of phenyl cyclic siloxane with DMC.
以苯基环体、二甲基环硅氧烷为原料，在催化剂存在下，经开环共聚、降解、脱除低沸物，制得低苯基含量的二苯基硅橡胶。
Bicyclic fused aziridines can generate regioselective ring opening reaction with various alcohols, catalyzed by slight concentrated sulfuric acid.
用醇作溶剂、微量的浓硫酸作催化剂，稠合双环氮杂环丙烷衍生物可发生区域选择性氮杂环开环反应。
The intermediate dye can then undergo an acid catalyzed ring opening to produce a colored dye form.
然后中间体染料可进行酸催化的开环，以产生有色染料形式。
In this paper, the advances on selection and use of catalysts for ring - opening polymerization of PLA are reviewed and the future work in this area is also evaluated.
讨论了聚乳酸研究中开环聚合过程中各种催化剂的选择和使用，并对未来工作进行了展望。
After it was mixed with epoxy resin, transition state was formed first. Then they got on with opening ring reactions according to bimolecular nucleophilic substitution mechanism (SN2).
它与环氧树脂混合后首先形成过渡状态，然后按双分子亲核取代(SN2)机理进行开环反应。
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