查询词典 polymerization
- 与 polymerization 相关的网络例句 [注:此内容来源于网络,仅供参考]
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In chapter 2 and 3, the ring-opening polymerization of 2, 2-dimethyl-trimethylene carbonate and trimethylene carbonate catalyzed by IMPPL were explored.
生物可降解聚碳酸酯在手术缝合线,骨固定材料和药物控制释放等领域的研究和应用越来越受到重视。
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In this dissertation, two series of rare earth initiators: rare earth tri (2, 6-di-tert-butyl4-methylphenolate) and rare earth calixarene complex have been developed to ring-opening polymerize 2, 2-dimethyltrimethylene carbonate, trimethylene carbonate and ε-caprolactone at mild conditions. Both the polymerization features and mechanisms are discussed in details.
本论文为环碳酸酯、内酯的开环聚合开发了两类新型低毒性稀土催化剂:三(2,6-二叔丁基-4-甲基苯氧基)稀土配合物和对叔丁基杯芳烃稀土配合物,都可以在温和的反应条件下单组分引发2,2-二甲基三亚甲基环碳酸酯、三亚甲基环碳酸酯和ε-己内酯聚合,合成各种分子量的均聚和共聚材料,考察了催化剂结构、聚合条件等对聚合的影响,深入研究了聚合机理。
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Next, another novel diamine, 5-5-(4-phenyl-1,3,4-oxadiazol-2-ylbenzene-1,3-diamine, was prepared and polymerization was carried out in the same way to obtain polyimides containig triphenylamine units and 1,3,4-oxadiazole moieties in the side chain .
接下来,合成另一个新型双胺5-5-(4-phenyl-1,3,4-oxadiazol-2-ylbenzene-1,3-diamine后,以相同方法进聚缩合反应,可制得另一系列三苯胺和1,3,4-恶二唑为侧链的聚醯亚胺。
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First, N'-(4-aminophenyl)-N'-4-(5-phenyl-1,3,4-oxadiazol-2-ylphenylbenzene-1,4-diamine was prepared and polymerization was carried out by direct polycondensation with a series of dianhydrides to obtain polyimides containig triphenylamine units in the main chain and 1,3,4-oxadiazole moieties as pendent group.
首先合成新型双胺N'-(4-aminophenyl)-N'-4-(5-phenyl-1,3,4-oxadiazol-2-ylphenylbenzene-1,4-diamine后,与一系的芳香族二酐进聚缩合反应,可制得一系列三苯胺为主链且1,3,4-恶二唑为侧链的聚醯亚胺。
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Keywords: cyclic trithiocarbonate;RAFT polymerization; multiblock polymer; narrow molecular weight distribution.
中文关键词:环状三硫酯;RAFT聚合;多嵌段聚合物,窄分子量分布
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Firstly, the homopolymerization of acrylamide was carried out in aqueous phase by reversible addition-fragmentation chain transfer radical polymerization using a trithiocarbonate as a chain transfer agent.
整个过程分为两步,首先在水溶液中,通过RAFT控制得到亲水性单体丙烯酰胺的均聚物;然后以得到的均聚物作为水溶性的大分子链转移剂,在水相中条件下参与亲油性单体苯乙烯无皂乳液聚合。
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Dithioester and trithiocarbonate RAFT reagents were synthesizedby different methods, and were used for the polymerization of styrene ormethacrylates, by thermal, thermo-initiator and photo-initiation.
针对这一问题,本文尝试用三种方法合成了结构不同的RAFT试剂,考察了热引发、引发剂引发以及紫外光引发条件下,二硫酯/三硫酯调控的常见单体苯乙烯以及丙烯酸酯的RAFT聚合。
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The main assembly unit partition is to mach tables of the bill of material, and unassembled partition is to search liaison between parts, compute assembly polymerization.Chapter 5 gives the general architecture of a prototype system for assembly unit partition based on knowledge under the CATIA environment to validate the ideas and methods proposed in this dissertation.
第四章提出了分主体装配单元划分和未组合件划分两步进行、中间穿插知识的解决装配单元划分的核心思想;以树模型为基础,通过实例知识的运用解决主体装配单元划分,以图模型为基础,通过构造关联图上的聚合度,运用模糊综合评判的方法实现了对未组合件的划分。
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The synthesis of the unbridged metallocene (2, 4-Me〓Ind)〓ZrCl〓, which is not found in reference. Polymerization of ethylene or propylene with the metallocene has high activity. The resulted ethylene/1-hexene copolymer characteristic of uniform comonomer distribution. The catalyst possess commercial value
合成了未见文献报道的非桥联茂金属(2,4-Me〓Ind)〓ZrCl〓,用这种茂金属催化乙烯或丙烯聚合均达到了很高的催化效率,所得的乙烯/1-己烯共聚物表现出共单体分布高度无序的特点,具有工业应用前景
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An expansion monomer 3, 9-dihydroxymethyl-di (6-methyl-5 -hydroxyl)-2- heptanone-1, 5, 7, 11tetraoxaspiro [5, 5] undecane was synthesized and its volume change during polymerization is about +3.04%. Its prepolymer was also synthesized by toluene 2, 4-diisocyanide with it.
由三经甲基丙烷合成了螺环原碳酸酯单体3'、9'-二羟甲基-3',9'-二乙基-1,5,7,11--四氧杂螺环[5、5]十一烷单体(体积膨胀率+3.04%)以及它的预聚物,并用其来改性环氧树脂B-63。
- 推荐网络例句
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It seems likely that Kraft will return with a better offer.
看起来卡夫要重新考虑一个更好的出价了。
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But he'd rather burn off my feelers and watch me squirm.
可他却放任那个家伙对我为所欲为!
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He consistance of the population dissociation coefficient method andthe sample dissociation coefficient method for the calculation of structural reliabilityin solid rocket motors was reviewed.
依据结构强度-工作应力理论模型,应用数理统计方法和对某团体发动机大量试验数据的实例计算,证明了总体变异系数法和样本变异系数法在结构可靠性计算中的一致性。