英语释义

1. a chemical condensation leading to the formation of a compound of high molecular weight

片语

polyester polycondensation聚酯缩聚

addition polycondensation加成缩聚

linear polycondensation线形缩聚

melt polycondensation熔融缩聚

block polycondensation嵌段缩聚

discontinuous polycondensation间歇缩聚

fasculation缩聚

polycondensation reactions缩聚反应

Polycondensation Conditions聚合反应条件

cyclic polycondensation环化缩聚

英汉例句

• the latest progress in polymerization process and technology for polyester was reviewed. the polymerization process and major factors, reactors and reaction models of polycondensation were discussed.

  综述了聚酯聚合过程中各个阶段及其影响或控制因素、聚酯缩聚反应器、以及聚酯缩聚反应模型等。

• it has significance in the kinetic study of melt polycondensation of aromatic polyesters and for the discussion of reaction process and mechanism.

  这对于讨论芳香族聚酯的缩聚过程及研究反应机理，都是很有意义的。

• the solving methods of the blockage of eg spray pipeline in pet final polycondensation system were introduced.

  介绍聚酯终缩聚反应系统的eg喷淋管线出现堵塞的处理办法。

• the polyester type photoresists made by melt polycondensation have wide molecular weight distribution.

  用熔融缩聚法含成的聚酯型光刻胶有较宽的分子量分布。

• by adding polycondensation side line, the single variety of the existing large capacity polyester plant was solved.

  通过增加缩聚侧线解决现有大容量聚酯装置品种单一性。

• poly(lactic acid)(pla) was prepared by means of direct polycondensation in azeotropic(solution.

  采用溶液共沸法直接缩聚制备聚乳酸。

• it is found that in the presence of butyl titanate or stannous oxalate as a polycondensation catalyst the carboxyl content is not always on the increase in all high vacuum stage.

  发现，钛酸四丁酯或草酸亚锡作为缩聚催化剂时，在整个高真空阶段羧基含量并不是一直增加的。

• in this paper, pba resin and pulps have been prepared directly by solution polycondensation and precipitation, separately.

  本文采用直接缩聚法制备pba树脂，用沉析法制备pba浆粕。

• high molecular weight polylactic acid (pla) was prepared from the low molar mass prepolymer of lactic acid by means of polycondensation on twin-screw extruder.

  利用双螺桿挤出机将低摩尔质量的乳酸预聚物在挤出机上进一步缩聚，制备出较高摩尔质量的聚乳酸。

• the temperature and time of alcoholysis and polycondensation were discussed.

  讨论了醇解和缩聚的温度及时间等因素。

• detailedly introduces definition classification and character of interfacial polycondensation and influential factors of polycondensate molecular weight.

  并着重介绍了界面缩聚的定义、分类、特点以及影响缩聚物分子量的因素。

• application of sb system catalyst on pet polycondensation process was evaluated from two aspects, the reaction activity and product quality. the practical experiences in industry were used.

  本文以工业使用的实际经验，从反应活性和产品质量两个方面来评价锑系催化剂在聚酯缩聚工艺中的应用。

• a comparison has been made between systems of stannous oxalate and antimony trioxide, the result shows the former has a bright future as a polycondensation catalyst in practical production.

  与酚类抗氧剂一起作为复合稳定剂，效果更佳。 较好的草酸亚锡体系与实用的三氧化二锑体系的比较，表明在实际生产中草酸亚锡作为缩聚催化剂是很有前途的。

• several novel polycondensation reactors and devolatilizers are introduced based on the principles of type selection and apparatus structure.

  在简述其选型原理及设备结构的基础上，介绍和推荐了一些新型缩聚反应器和脱挥装置。

• ester bond can be formed through the polycondensation of hard segment monomer with uniform segment length containing amide bond and dihydric alcohol, which is a better way to prepare polyesteramide.

  先制备具有均一链长的含有酰胺键的硬段单体，然后与二元醇进行缩聚反应生成酯键是制备性能良好的聚酰胺酯的较好途径。

• the shaft seal leakage, judgement and emergency measures of the final polycondensation reactor was introduced.

  介绍了终缩聚反应器轴封泄漏的现象、判断和应急措施。

• ppta (polyphenylene terephthalamide) pulp was prepared by semi-continuous direct polycondensation using a co-current rotating and meshing twin screw extruder as main reactor.

  以同向啮合旋转的双螺桿挤出机作为主反应器，采用半连续化直接缩聚法制备了ppta浆粕。

• the results showed that both methods of air blowing and thermal polycondensation in the presence of nitrogen raised the asphalt softening points, and increased coke yields and heptane insolubles.

  结果表明，空气氧化和氮气热缩聚可提高石油沥青的软化点、焦产率和正庚烷不溶物含量。

• the state and forming mechanism of graphite in cast iron are analysed with classical dynamics and polycondensation theory.

  运用经典动力学和缩聚理论的基本观点对铸铁中石墨形态及形成机理进行了分析研究。

• this paper approaches the effect of molar ratio of formaldehyde to urea before polycondensation on properties of uf-resin and puts forward the best reaction of molar ratio in the resin production.

  本文探讨了缩聚前甲醛与尿素的摩尔比对脲醛树脂性能的影响，并提出树脂生产的最佳反应摩尔比。