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- The process of ring opening reaction is proved through analyzing aminating mechanism by IR and NMR. 利用红外及核磁共振碳谱分析了胺化反应机理,证明是开氧环反应。
- 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。
- Their ring opening reactions can be used for preparing polyfunctional or other cyclic compounds. 另外,利用该反应还可以提供保护基以及立体、区域选择性地合成各种有机化合物。
- The recent progress in rhodium-catalyzed asymmetric ring opening (ARO) reactions of azabenzonorbornadienes is reviewed. 综述了铑催化不对称氧(氮)杂苯并降冰片烯开环反应的研究进展。
- The development of study on ring opening metathesis polymerization(ROMP) of norbornene(NBE) and its derivativesis reviewed with 30 references. 综述了降冰片烯(NBE)及其衍生物开环易位聚合(ROMP)的研究进展。
- Kinetic modeling was carried out to explore possible reaction mechanism of methylcyclopentane ring opening over a Pt/SiO 2. 用动力学模拟的方法探索甲基环戊烷在铂催化剂上开环的反应机理。
- Ring opening of copolymerization and homopolymerization between acrylpimaric acid and ethylene oxide at different mole ratio were studied. 研究了丙烯海松酸与不同摩尔数的环氧乙烷所进行的开环均聚和共聚反应。
- 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。
- 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 results revealed that the components with bicyclic ortho ester had expansibility in the ring opening polymerization by initiation of cationic compounds. 对膨胀聚合反应研究发现,带有膨胀基团双环原酸酯的材料在阳离子引发剂存在下开环时具有膨胀特性。
- This paper reviews the synthesis progress of polysiloxane,focusing on the anionic induced ring opening polymerization.Then the applications of polysiloxane are also summarized. 文章阐述了聚硅氧烷的合成方法,其中重点介绍了应用较为广泛的阴离子引发的环硅氧烷的本体开环聚合,并对聚硅氧烷的应用情况进行了总结。
- Poly(adipic anhydride)(PAA) was synthesized by the ring opening polymerization of adipic anhydride(AA) initiated by allylmagnesium chloride in solution and in bulk. 以烯丙基氯化镁引发己二酸酐开环聚合制备功能化的聚己二酸酐。
- This paper introduces a finger-helped method to show the ring opening and the ring closing of electrocyclization,and give the correct configuration of the related products. 通过对平膜压电谐振式结冰传感器的几种测量方案的分析,提出一种开环扫频的信号检测方法。
- When the liquid formulation wre coated on optical substrate and exposed to UV irradiation, the initiators decomposed to cations intermediate and catalyzes the ring opening polymerization to form solid network. 配合适量之光起始剂，将液态树脂涂布于光透明基材上，经由uv照光可进行快速交联反应机制，形成固体聚合物。
- The cation ring opening polymerization of the monomer(ECH) is carried out by using a catalyst SnCl 4 to obtain the polyepichlorohydrin(PECH) prepolymer , with the prepolymer PECH reacting on NaN 3 in organic solvent DMSO. 用阳离子聚合合成端羟基聚环氧氯丙烷（PECH），然后采用大分子基团取代的方法，让PECH和NaN3在非质子极性溶剂DMSO中反应合成叠氮粘合剂GAP。
- The regioselectivity of intramolecular nucleophilic ring opening reaction of aziridines is controlled by the ring size of products, fivemembered ring> six-membered ring> seven-membered ring. 分子内的亲核开环反应主要受成环时环大小的控制，成环时的倾向是五元环＞六元环＞七元环。
- She had the sapphire set in a gold ring. 她把那枚蓝宝石镶在金戒指上了。
- The diamond ring dazzled with brilliancy. 这只钻石戒指闪耀夺目。
- Lewis acid catalyzed acetylation of steroidal sapogenin was reinvestigated, and the previous assigned structures A, B and C of E/F ring opening products were rectified as 1, 2 and 3 according to X ray diffraction analysis. 重新研究了Lewis酸催化的甾体皂甙元E/F螺环乙酰化开环反应;并通过波谱分析和单晶X衍射修正了原指定结构.
- Polyhydroxylated polybutadiene(PHPB) was synthesized, when hydroxyl terminated polybutadiene (HTPB) was epoxidized and ring opened with performic acid. 采用过氧甲酸原地法对端羟基聚丁二烯(HTPB)进行环氧化及开环,合成了多羟基聚丁二烯(PHPB)。
