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opening polymerization
相关语句
  开环聚合
     Poly(L-lactide)(PLLA) was synthesize by ring opening polymerization of 1-lactide.
     采用丙交酯开环聚合合成聚L-乳酸(PLLA),研究了引发荆用量、聚合时间对聚L-乳酸分子量的影响.
     The Ln(TFA)32H2O-Al(i-Bu)3-I were used as catalyst for ring opening polymerization of epichlorohydin(ECH). It was found that coordination catalysts composed of Y, La, Pr, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb all have catalytic activities for the polymerization of ECH.
     研究了Ln(TFA)_3·2H_2O~Al(i—Bu)_3—Ⅲ络合体系催化环氧氯丙烷(ECH)开环聚合特征,发现Pr、Tm、Yb、Y等11种稀土元素的络合催化剂都具有一定的催化活性。
短句来源
     The ring opening Polymerization of ECH by Tm(TFA)3-Al(i-Bu)3-acac is of first order with respect tn monomer concentration. The activation energy of the polymerization reaction is 43. 4 KJ. mol-1.
     Tm(TFA)_3—Al(i—Bu)_3—acac络合催化ECH开环聚合速率与ECH的浓度呈一级关系,聚合表现活化能Ea=434KJ·mol~(-1)。
短句来源
     Synthesis and Ring—Opening Polymerization of Optically Active 4(S)—2—Methy 1—4—Methoxycarbony 1—2—Oxazoline
     光学活性4(S)-2-甲基-4-甲氧羰基-2-噁唑啉的合成和开环聚合
短句来源
     Cationic Ring opening Polymerization of 3 Methyl 3 oxetanemethanol
     3-甲基-3-氧杂丁环甲醇的阳离子型开环聚合
短句来源
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  “opening polymerization”译为未确定词的双语例句
     RING OPENING POLYMERIZATION OF(CHLOROMETHYL)THIIRANE BY RARE EARTH COORDINATION CATALYSTSⅢ.HOMOPOLYMERIZATION OF(CHLOROMETHYL)THIIRANE AND ITS POLYMERIZATION KINETICS
     RING OPENING POLYMERIZATION OF (CHLOROMETHYL)THIIRANE BY RARE EARTH COORDINATION CATALYSTS Ⅲ.HOMOPOLYMERIZATION OF (CHLOROMETHYL)THIIRANE AND ITS POLYMERIZATION KINETICS
短句来源
     STUDY ON RING OPENING POLYMERIZATION OF 2 SUBSTITUTED 4 METHYLENE 1,3 DIOXOLANE
     2-位取代的4-亚甲基-1,3-二氧环戊烷开环聚合反应研究
短句来源
     Ring Opening Polymerization of 3-Morpholinone and ε-Caprolactone with Zinc Powder as Catalyst
     锌粉催化3-吗啉酮和ε-己内酯的开环聚合反应
短句来源
     Microwave-Assisted Ring Opening Polymerization of Caprolactone and Lactide
     己内酯和丙交酯的微波辅助开环聚合反应
短句来源
     Ring opening polymerization of e-caprolactone (CL) at low temperature catalyzed by lanthanum tris(2,6-di-tert-butyl-4-methylphenolate) (La(OAr)3) has been studied for the first time.
     本文研究了2,6-二叔丁基-4-甲基-苯氧基稀土化合物(简称La(OAr)_3)对ε-己内酯(CL)的低温聚合特性。
短句来源
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  相似匹配句对
     Ring-opening Polymerization of Cyclic Sulfides
     环硫化合物的开环聚合
短句来源
     Ring-Opening Polymerization with Bimetallic Complexes
     多元络合物催化开环聚合
短句来源
     Opening to whom
     向谁开门
短句来源
     the opening strategy.
     开放策略。
短句来源
     Polymerization of Vinylidenefluoride
     偏氟乙烯的聚合反应
短句来源
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  opening polymerization
Synthesis, structure and ring-opening polymerization of macrocyclic arylates containing phthalic unit
      
The first step is the polymerization of butadiene block capped with ethylene oxide and its tosylation; the second step is the cationic ring-opening polymerization of 2-ethyl-2-oxazoline.
      
On the basis of structural analysis, the effects of molecular structure parameters on ring-opening polymerization of benzoxazines have been explored.
      
Kinetics and mechanism studies on scandium calix[6]arene complex initiating ring-opening polymerization of 2,2-dimethyltrimethyl
      
The anionic ring-opening polymerization of propylene oxide proceeds by nucleophilic attack of the secondary alcohol propagating anion on monomer.
      
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High molecular weight polyoxymethylene was obtained from trioxane crystal by solid state polymerization with γ-irradiation from Co80 source. The crystal structure of trioxane was accurately determinated. By using the crystal structure model of trioxane, the ring-opening polymerization mechanism of trioxane by γ-irradiation may be fairly well explained. Polyoxymethylene obtained by solid state polymerization of trioxane may have two types of molecular chains with different orientations, one parallel...

High molecular weight polyoxymethylene was obtained from trioxane crystal by solid state polymerization with γ-irradiation from Co80 source. The crystal structure of trioxane was accurately determinated. By using the crystal structure model of trioxane, the ring-opening polymerization mechanism of trioxane by γ-irradiation may be fairly well explained. Polyoxymethylene obtained by solid state polymerization of trioxane may have two types of molecular chains with different orientations, one parallel to the C-axis of trioxane, while the other forming an angle of 75°37' with the C-axis.

用Co~(60)γ射线辐照三聚甲醛晶体固相聚合得到高分子量的聚甲醛。我们精确测定了三聚甲醛的晶体结构,利用三聚甲醛晶体结构模型,可以很好地阐明三聚甲醛在受到γ射线辐照后开环聚合的机理,由三聚甲醛晶体固相聚合得到的聚三聚甲醛,应该有两种不同取向的分子链,一种与三聚甲醛的c轴平行;另一种与c轴成75°37′的交角。

The polymerization of aromatic nitriles (benzonitrile and benzyl cy-anide) with Friedel-Crafts reagents and boron trifluoride-anisole comp-lex catalyst has been studied. It was observed that C_6H_6CH_2CN could bepolymerized with BF_3or TiCl_4, in the temperature range of 200—300℃, topolyphenylacetonitrile, but with BF_3-C_6H_5OCH_3 complex catalyst it wasnot polymerized. In the presence of metal halides cyclotrimerization ofbenzonitrile took place, leading to the formation of 2, 4, 6-triphenyl-s-triazine. At...

The polymerization of aromatic nitriles (benzonitrile and benzyl cy-anide) with Friedel-Crafts reagents and boron trifluoride-anisole comp-lex catalyst has been studied. It was observed that C_6H_6CH_2CN could bepolymerized with BF_3or TiCl_4, in the temperature range of 200—300℃, topolyphenylacetonitrile, but with BF_3-C_6H_5OCH_3 complex catalyst it wasnot polymerized. In the presence of metal halides cyclotrimerization ofbenzonitrile took place, leading to the formation of 2, 4, 6-triphenyl-s-triazine. At higher temperature(350℃), BF_3-C_6H_5OCH_3 complex could,however, induce both the polymerization and the trimerization of benzo-nitrile.The relation between the polymerization and the cyclotrimerizationof C_6H_5CN has been further investigated.It was shown that in the presen-ce of BF_3-C_6H_5OCH_3 complex the cyclic trimer of C_6H_5CN may under-go ring-opening polymerization. Based on these results, it is suggestedthat the mechanism of polymerization for benzonitrile as well as for ben-zyl cyanide probably involves the intermediate stage of the cyclic trim-er. Some properties of these polynitriles, such as semiconductivity, cat-alysis etc., were reported.

本文研究了芳香腈(苯腈和苯乙腈)在傅氏试剂(BF_3,TiCl_4)及BF_3—C_6H_5OCH_3络合物等催化剂作用下的聚合反应。作者观察到,苯乙腈在BF_3和TiCl_4作用下于200—300℃范围内可以进行聚合反应,生成聚苯乙腈,而BF_3-C_6H_5OCH_3不能引起其聚合;苯腈在博氏试剂作用下主要进行环化三聚反应,生成2、4、6—三苯基均三嗪。但BF_3-C_6H_5OCH_3络合物却可在高温(350℃)下导致苯腈同时进行聚合反应和三聚化。对苯腈的聚合和环化三聚反应之间的关系进行了过一步的探讨,表明苯腈三聚体可在BF_3-C_6H_5OCH_3作用下发生开环聚合。根据这些结果,作者建议腈类的聚合反应历程可能经这环化三聚体的中间阶段。对于聚苯腈的若干性能(半导性、催化性等)也进行了测定。

The activation effect of various polyhalophenols on the ring-opening polymerization of cyclopentene with WCl6-i-Bu3Al catalyst has been investigated. Experimental results showed that 2, 4, 6,-trichlorophenol, 2, 3, 4, 6-tetrachlorophenol and pentachlo-rophenol are highly effective activators in the ring-opening polymerization of cyclopentene to trans polypentenamer in petroleum ether. In the absence of the activator or in the presence of the phenol the six solvents have the effects on the catalytic...

The activation effect of various polyhalophenols on the ring-opening polymerization of cyclopentene with WCl6-i-Bu3Al catalyst has been investigated. Experimental results showed that 2, 4, 6,-trichlorophenol, 2, 3, 4, 6-tetrachlorophenol and pentachlo-rophenol are highly effective activators in the ring-opening polymerization of cyclopentene to trans polypentenamer in petroleum ether. In the absence of the activator or in the presence of the phenol the six solvents have the effects on the catalytic activity in the following order: chlorobenzene > toluene (benzene) > petroleum ether (heptane, cyclohexane). The cocatalytic activity of three diethylaluminium halides is in the following order: Et2AlI > Et2AlCl > Et2AlBr. The trans-vinylene content of polypentenamer is not affected by the nature of polyhalophenols, solvents and aluminium alkyls, and the polymerization conditions.

本文研究了苯酚、卤代苯酚和多卤代苯酚对 WCl_6-i-Bu_3Al 催化体系在环戊烯开环聚合中的活化效果。实验结果表明:(1)在苯环上至少有两个取代的氯原子的苯酚在芳烃中才能具有高活化作用;在烷烃中至少要有三个取代的氯原子的苯酚,如2,4,6-三氯苯酚、2,3,4,6-四氯苯酚和五氯苯酚,其活化效果才更显著。(2)在无活化剂或活化效果较差的苯酚和一溴苯酚存在下,溶剂效应次序:氯苯>甲苯(苯)>加氢汽油(庚烷、环已烷);在活化效果高的多卤代苯酚存在下,溶剂效应不显现。(3)比较了三种卤代烷基铝的助催化效果,其助催化活性次序:Et_2AlI>Et_2AlCl>Et_2AlBr。(4)双烯烃对环戊烯开环聚合有一定的调聚作用。在实验条件下聚合物反式链节含量没有明显改变。

 
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