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- 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。
- 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。
- 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。
- This paper introduces the developmentof PA- 6 hydrolytic loop- open polymerization pro- cess and detailed comparison is made among the processes of Zimmer,Karl Fischer,Inventa and Noy,as well as American Allied and Japanese Ube processes. 介绍了 PA- 6水解开环聚合生产工艺及其进展 ,将德国 Zim mer工艺、 Karl· Fis-cher工艺、瑞士 Inventa工艺、意大利 Noy工艺作了较详细的比较 ,同时介绍了美国 Al-lied公司、日本宇部兴产公司生产方法。
- The ring opening polymerization(ROP) of cyclic ester monomers in the presence of various initiator/catalyst systems is a main approach for the preparation of biodegradable aliphatic polyesters. 环酯单体在不同引发/催化体系作用下的开环聚合是制备可生物降解脂肪族聚酯的主要方法。
- The structural characteristics of copolymers were attested by IR, 1H-NMR, DSC, GPC, CD etc.The results show that products of NCA ring opening polymerization initiated by MPEG-NH2 are block copolymers. 利用IR、NMR、DSC等方法对共聚物结构进行了表征，同时利用圆二色光谱(CD)考察了聚合物材料在水溶液中的二级结构。
- Living ring opening polymerization 活性开环聚合
- Keywords Polyglycolic acid;Glycolide copolymers;Ring opening polymerization;Biodegradable polymer;Medical application; 聚羟基乙酸;乙交酯共聚物;开环聚合;生物降解材料;医学应用;
- 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。
- Preparation of caprolactone with ring - opening polymerization 开环聚合制备聚己内酯
- Pea pods burst open when overripe. 豌豆过熟就会爆裂。
- Open tender for purchasing power transformer. 公开招标购买电力运输设备。
- We bivouacked on the open plain. 我们在开阔的原野上露营。
- Keywords PLA;lactide;catalyst system;ring opening polymerization; 聚乳酸;丙交酯;催化体系;开环聚合;
- I had to use force in opening the door. 我不得不用力开那一扇门。
- This little gadget's great for opening tins. 这小玩意儿开罐头挺好用。
- She's go to play the opening bar of the sonata. 她准备演奏这支奏鸣曲的开始数小节。
- Two smaller screens will be opening in May. 五月份将有两家小型电影院开业。
- Thank you. How long will this offer be open? 谢谢。这个报价的有效期多长？
