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- diphenylketene ketene 二苯乙烯酮
- AKD (alkyl ketene dimer) emulsions offered good sizing, but rendered very poor ink hold-out. AKD乳液提供了良好上胶度，但纸之托色效果甚差；
- It is synthesized of ketene and crotonaldehyde method or 1,3- butadiene and acetic acid method. 山梨酸可用乙烯酮巴豆醛法、丁二烯乙酸法合成。
- A method of the synthesis of chloroacethyl chloride from ketene and chlorine in a solvent is introduced. 介绍了乙烯酮与氯气在溶剂中合成氯乙酰氯的方法。
- The synthesis of chloroacetyl chloride by the chlorination of ketene was studied in the article. 研究了乙烯酮氯化法合成氯乙酰氯。
- Depending upon reaction conditions, the product may be a polyketone formed b y addition polymerization of the ketene double bond. 随着反应条件的不同，产物可以是由烯酮的双键加成聚合得到的聚酮。
- Thermoplastic corn starch was blended with reactive polyamide (RPA) and alkyl ketene dimmer (AKD) and the blend was cast into composite films. 为了提高淀粉基复合膜的干/湿态力学性能,将反应性聚酰胺(RPA)、烷基烯酮二聚体(AKD)与热塑性玉米淀粉(St)复合后采用浇铸法制备新型疏水化复合膜。
- A composite film was prepared through the reaction of methylcellulose, polyamide, and alkyl ketene dimmer.Glycerol was used as a plasticizer. 以丙三醇为增塑剂,将甲基纤维素、聚酰胺与烷基烯酮二聚体反应后制备出甲基纤维素／聚酰胺复合膜。
- The inclusion of polyamide and alkyl ketene dimmer improved the mechanical properties of methylcellulose, especially the wet tensile strength. 力学性能测试表明,聚酰胺、烷基烯酮二聚体能够明显改善纤维素复合膜的力学性能,尤其是湿态拉伸强度。
- Sizing mechanism of AKD(Alkyl Ketene Dimmer)was demonstrated in the current paper, followed by its effect on paper friction. 着重介绍了AKD施胶的机理,并对AKD施胶所带来的纸页摩擦系数的降低进行了分析。
- Using ab initio and DFT methods, the reactions about ketene with H and CN free radicals have been investigated in this thesis, as following: 1. 本文采用量子化学的从头算和密度泛函方法，研究了CH2CO与H和CH2CO与CN的自由基反应机理;得到了以下结果： 1.
- A large molecular sizing agent modified AKD was prepared through the reaction between alkyl ketene dimmer (AKD) and polyamide then cationization by epichlorohydrin. 将聚酰胺多胺与AKD反应,并用环氧氯丙烷将其阳离子化,制备出一种具有高阳电荷的改性AKD大分子,并在中、碱性条件下用该改性AKD对漂白硫酸盐阔叶木浆进行施胶。
- Isopropenyl acetate was synthesized from ketene and acetone by direct esterification using strong acidic cation-exchange resin to substitute H2SO4 as catalyst. 以乙烯酮和丙酮为原料,用强酸性离子交换树脂代替浓硫酸作为催化剂,直接酯化合成乙酰丙酮的中间体乙酸异丙烯酯。
- The paper introduces the application of AKD (Alkyl Ketene Dimer) neutral sizing and necessary additives in peel base paper, and the efficiency and attention are included. 本文以实际生产为基础,介绍了AKD施胶剂、配套助剂在离型原纸生产中的应用及性能评价,对生产中常见的问题进行了探讨并列出了相应的解决措施。
- The affection of solvent kinds,the solventratio,the chlorine ratio,the reaction temperature,and the reactor mode etc.to the chlorination of ketene was investigated. 考察了溶剂、溶剂比、氯气配比、反应温度及反应器型式等对乙烯酮氯化的影响。
- Pulse injection of CH3I and CH3OH into the in situ cell resulted in the appearance of some crucial C2 intermediates in the reaction, such as surface acctyl, acetate, ketene and enolate . 捕获剂CH_3I和CH_3OH以脉冲方式引入原位红外池,分别捕获到一些较关键的C_2中间物:表面乙酰基、表面乙酸盐、乙烯酮和烯醇盐。
- The paper presents a review of the neutral sizing with alkyl ketene dimmer(AKD).Some factors influencing AKD sizing are discussed.And the methods for determination of AKD in paper are also introduced. 介绍了几种测定纸页中AKD含量的方法,并对AKD的施胶机理和影响AKD施胶的因素作了简单总结。
- Abstract : The bimolecular single collision reaction potential energy surface of an isocyanate NCO radical with a ketene CH2CO molecule was investigated by means of B3LYP and QCISD(T) methods. 摘要 ： 采用B3LYP和QCISD(T)方法计算得到了NCO自由基与乙烯酮(CH2CO)双分子单碰撞反应势能面。
- Ketenes, notably dimethyl ketene, readily undergo oligomerization and polymerization. 烯酮，特别是二甲基烯酮，很容易齐聚和聚合。
- Keywords chloroacetyl chloride;ketene;chlorination; 氯乙酰氯;乙烯酮;氯化;
