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condensation polymerization是什么意思,condensation polymerization的意思翻译、用法、同义词、例句

输入单词

常用词典

  • [高分子] 缩聚反应;缩聚合

  • 例句

  • Cardanol -aldehyde ferric polymers were prepared by condensation polymerization with formaldehyde, n-butyl aldehyde, furfural and iron trichloride.

    以溶液缩聚法,由腰果酚分别与甲醛、*********、糠醛和************制备了腰果酚醛铁聚合物。

  • Microcapsules of Phthalocyanine Green G with urea-formaldehyde resin wall were prepared by in-situ condensation polymerization reaction with acid catalyzer.

    用原位聚合法制备以脲醛树脂为壁材的酞菁绿G颜料微胶囊,采用了酸催化下的缩聚反应工艺。

  • Microcapsules of pendimethalin with a urea-formaldehyde resin wall were prepared by an in-situ condensation polymerization reaction in aqueous medium.

    研究了分散、乳化条件及成囊工艺对以脲醛树脂为壁材制备二甲戊乐灵微胶囊状态的影响。

  • Influence of the reaction conditions on the condensation polymerization at the presence of DBTL was discussed.

    讨论了二月桂酸*********锡催化剂存在下反应条件对缩聚反应的影响。

  • In condensation polymerization, the monomer need have only one functional group -the presence of two or more functional groups usually leads to the production of cross-linked addition polymers.

    在缩聚合作用中,单体仅需有一个功能团,两个或两个以上功能团的出现经常会导致交联附加聚合物的生成物。

  • A new type of phenolic resin adhesive for casting was prepared by condensation polymerization of furfuryl alcohol and the reaction product between phenol, phenylphenol, urea and formaldehyde.

    苯酚、************、尿素与甲醛的反应产物进一步与糖醇缩聚生成新型铸造用改性酚醛树脂粘结剂。

  • A bakelite resin adhesive was synthesized with raw materials of phenol, resorcinol, formaldehyde by the method of one stage process condensation polymerization.

    研究了以************、苯酚、甲醛为原料,改用一步共缩聚的方法合成************酚醛树脂胶粘剂;

  • There are two main methods to synthesis PLA, ring- opening polymerization of lactide and condensation polymerization of lactic acid.

    聚乳酸的合成主要有两种方法:丙交酯的开环聚合和乳酸直接缩聚。

  • There are two main methods to synthesis PLA, condensation polymerization of lactic acid and ring-opening polymerization of lactide.

    聚乳酸的合成主要有两种方法:乳酸直接缩聚和丙交酯的开环聚合。

  • It also shows that methylamide can restrain the hydrolysis of alcohol salt, increase the rate of condensation polymerization and keep the film from dry crack.

    甲酰胺可以抑制醇盐水解,提高缩聚速率并避免薄膜干燥开裂。

  • The double- melt behavior, thermal stability of soild state condensation polymerization of PET and the crystallization, expansibility of PET bottle have been stu***d by DSC, TGA and TMA.

    应用DSC、TGA和TMA研究了固相聚合PET 树脂的双重熔融行为、热稳定性及瓶坯、包装瓶的结晶性能和膨胀性。

  • Water-soluble chitosan was prepared by modification of chitosan with maleic anhydride, and then nylon 64 was grafted onto it by condensation polymerization.

    通过************酰化改性制取水溶性壳聚糖,利用沉淀缩聚方法将尼龙接枝于该水溶性壳聚糖上。

  • More recently, its applications have been expanded to supervise chemical reactions, especially the addition polymerization, condensation polymerization, cross-linking, decomposition course and etc.

    近来,介电谱技术又被用于监测化学反应,特别是加聚、缩聚、交联以及降解过程等等。

  • Two types of polymerization are recognized: (1)condensation polymerization and (2) addition polymerization.

    人们已知有两种聚合方式:(1)缩聚,(2)加聚。

  • In condensation polymerization, the monomer will affect the purity of the molar ratio of functional groups, so that the molecular weight deviates from the set value.

    在缩合聚合中,单体的纯度会影响到官能团的摩尔比,从而使聚合物的分子量偏离设定值。

  • The results show that high-molecular weight PLA can be prepared by the direct melt condensation polymerization at suitable technological condition and the product has good biodegradability.

    结果表明:采用适当的工艺能通过熔融缩聚法制备出高分子质量的聚乳酸,且具有良好的生物降解性能。

  • They are usually prepared from equivalent amounts of glycols and dibasic carboxylic acids, which undergo condensation polymerization to produce the polyester and water.

    通常由等当量的甘醇和二元羧酸制备,它们经过聚合作用而生成聚酯和水。

  • Hybrid UV curing system includes free radical cationic hybrid UV curing system, Free radical condensation polymerization system and free radical free radical system.

    混杂光固化体系包括自由基阳离子混杂光固化体系、自由基缩聚混杂体系和自由基自由基混杂体系等。

  • DCPD type unsaturated polyester resin prepared by using semi condensation polymerization method is proposed.

    本文用半缩聚法合成***************型不饱和聚酯树脂。

  • In condensation polymerization, each monomer unit must have at least two functional groups.

    即,单体是一个单体单元,而二聚体是两个单体单元。

  • The formulation. process flow and conditions in the production of nylon 66 with continuous condensation polymerization are introduced.

    介绍用连续缩聚法生产尼龙66的配方,工艺流程及条件。

  • It was thought that the reaction was a positive ion-typed condensation polymerization catalyzed by acid.

    该反应为酸催化下的阳离子型缩聚反应。

  • 专业解析

    缩聚反应(condensation polymerization)是一种通过单体分子间官能团缩合生成高分子聚合物的化学过程。该反应过程中,单体之间通过脱去小分子副产物(如水、醇或氯化氢等)形成共价键,逐步增长为长链聚合物。例如,聚酯和尼龙的合成均属于典型的缩聚反应(来源:美国化学会ACS)。

    缩聚反应的核心机制涉及两个或更多官能团的相互作用。例如,羧酸与醇反应生成酯键时,会脱去一分子水。这种逐步聚合的特点使得分子量随时间缓慢增加,最终产物的分子量分布较宽(来源:英国皇家化学会RSC)。常见的缩聚反应类型包括聚酯化反应(如PET塑料)和聚酰胺反应(如尼龙-6,6)。

    该反应在工业中应用广泛:

    1. 聚酯纤维:用于纺织品和塑料瓶,通过二元酸与二元醇缩合制成。
    2. 工程塑料:聚碳酸酯由双酚A与光气缩聚而成,应用于防弹玻璃。
    3. 生物材料:聚乳酸(PLA)作为可降解材料,通过乳酸缩聚制备(来源:ScienceDirect聚合物科学专题)。

    缩聚反应与加聚反应的关键区别在于副产物的生成,这一特性使其在可控合成功能高分子材料领域具有独特优势(来源:MIT开放式课程-高分子化学章节)。

    网络扩展资料

    Condensation polymerization(缩聚反应) 是一种通过单体分子间反复缩合生成高分子聚合物并伴随小分子副产物(如水、醇等)的化学反应。以下是其核心要点:

    1. 定义与机理
      缩聚反应中,单体通常含有两个或以上可反应的官能团(如羧酸与醇、胺与羧酸等),通过脱去小分子(如H₂O、HCl)逐步连接成长链聚合物。例如,聚酯(如PET)的合成就是典型的缩聚反应。

    2. 特点

      • 副产物生成:反应过程中会释放小分子(如提到的“缩聚是放热反应”)。
      • 逐步增长:分子量随反应时间逐步增加,需较长时间达到终点。
      • 官能团依赖性:单体需具备至少两个反应性官能团。
    3. 分类与实例

      • 熔融缩聚:在单体与聚合物均熔融的状态下进行(如聚乳酸的合成,)。
      • 溶液缩聚:在溶剂中进行,适用于高温易分解的体系。
        常见产物包括尼龙(聚酰胺)、聚碳酸酯等。
    4. 与加聚反应的区别
      缩聚反应伴随小分子释放,而加聚反应(如聚乙烯的合成)无副产物,仅通过不饱和键打开连接。

    如需进一步了解具体反应条件或工业应用,可参考高分子化学教材或专业文献。

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