polycondensation

Study on the calculation of gel points of complicated three dimensional polycondensation systems

复杂体型缩聚体系凝胶点的预测

A novel furan resin was synthesized by polycondensation between furfuralcohol and furfural.

用糠醇和糠醛缩聚制备了新型呋喃树脂.

It is shown that tectonic stress is in favor of the chemistry environment transfer of hydrogen in coal, resulting in the decrease of aliphatic hydrocarbon and the increase of aromatic hydrocarbon in content, and accelerating the polycondensation and ordering of large molecules texture of coal.

结果表明，构造应力有利于煤中氢发生化学环境转移，使脂肪烃含量相对减少、稳定的芳香烃含量相对增加，促进煤大分子结构缩合度和有序度增加。

The results showed that the catalyst concentration was increased and the PET polycondensation time was shortened while increasing Si content in nano-Ti/ Si composite catalyst.

结果表明：随着纳米Ti/Si复合催化剂中Si含量的增加，催化剂浓度增大，PET缩聚反应时间缩短。

It is pointed out that their technology and equipment can produce the bottle grade PET chip which is up to the certification requirement of CoCo Cola Company and have the ability of modifying the original PET production line to produce solide state polycondensation PET material.

指出，他们的技术和设备都能生产出符合可口可乐认证要求的瓶级聚酯切片，均具有对原聚酯生产线进行改造生产固相缩聚聚酯原料的能力。

Polycondensation catalyst may has bad effect on polyester afterprocessing properties.

缩聚催化剂会对聚酯后加工性能产生不良影响.

A sol containing SiO_2 particles was prepared by the base catalyzed hydrolysis and polycondensation of tetraethoxysilane ( TEOS) through sol-gel process.

通过溶胶凝胶法，在碱性条件下水解缩聚正硅酸乙酯获得含有SiO2颗粒的溶胶；

The polycondensation of p-phenylenediamine and terephthaloyl chloride in amide solvent system has been studied.

本文研究了在酰胺-盐溶剂体系中对苯二胺与对苯二甲酰氯的缩聚反应，溶剂对缩聚反应的影响以及溶剂体系与对苯二甲酰氯的副反应。

The key equipment in polycondensation phase of non-phosgene process was emphatically introduced.

同时,介绍了 非 光气法缩聚阶段的关键设备.

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。

Organic silicate is prepared by Quaternizing, Hydrosilylation addition and Balanced or Polycondensation reaction.

有机硅季铵盐是通过季铵化, 硅氢化加成和平衡或缩聚等反应制得.

Two kinds series a and b of wholly aromatic copolyester liquid crystal are obtained by means of melt-polycondensation.

本文用熔融缩聚法合成了a，b两系列全芳香族共聚酯液晶。

This paper introduces the application of domestic potassium-iodide in the continuous polycondensation of nylon 66.

介绍了国产碘化钾添加剂在尼龙66连续缩聚反应中的应用.

Adiabatic determination of kinetic parameters on polycondensation reaction of paraphenylene diamine and Terephthalyl chloride

用绝热法测定对苯二胺与对苯二甲酰氯缩聚反应的动力学参数

Direct Synthesis of Biodegradable Material PLEG via Melt Polycondensation

熔融聚合法直接合成生物降解材料PLEG

PLA has been produced by ring-opening polymerization of lactide or direct polycondensation of lactic acid.

制备聚乳酸常通过乳酸的直接聚合或丙交酯的开环聚合两种方法。

Methods: The polycondensation of amino acids in liposome system as well as in aqueous buffer solution was started from amino acid-N-carboxyanhydrides ( NCAs).

方法：活化氨基酸的聚合反应在囊泡体系和对照缓冲溶液中进行，反应产物用高效液相色谱-质谱联用仪进行分离检测。

A Study of the Control of the Reacting Substance Proportion and Property of Cascade Reactor System of PC Continuous Interfacial Polycondensation

聚碳酸酯连续界面缩聚反应物配比的控制与串联反应釜特性的研究

Novel controlled releasing polythiourea microcapsules were prepared from terephthaloyl diisothiocyanate and o-phenylenediamine by interfacial polycondensation.

以对苯二甲酰异硫氰酸酯和邻 苯二胺 为原料通过界面缩聚法合成了聚硫脲缓释微胶囊.

The experimental results showed that the obtained PET/ MMT nanocomposites exhibited fairly good overall properties when the MMT addition was 2.5% by mass fraction and the polycondensation terminal temperature was 250 ℃.

结果表明：MMT的添加质量分数为2.5%，缩聚反应终温250℃时，PET/MMT纳米复合材料具有较好的综合性能。

1H NMR monitor of the polycondensation showed that TEA acted as not only acid-acceptor but also catalyst to activate BPS for nucleophilic substitution. And condensation between HCCP and BPS followed a bimolecular nucleophilic substitution ( S_N2) pattern.

核磁跟踪测试表明，HCCP和BPS进行的是双分子亲核取代反应（SN2），三乙胺（TEA）在反应中不仅作为缚酸剂，而且还起着活化BPS、促进亲核进攻的作用。

The kinetics of nylon-1010 polycondensation at earlier stage in an open system was studied.

研究了尼龙1010盐敞开系统熔融缩聚的前期动力学.

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.

It is mainly synthesized by two chemical ways: ring-opening polymerization and direct polycondensation.

合成聚苹果酸的化学方法主要有开环聚合法与直接聚合法.

Study on the reaction kinetics of high efficiency catalysts for pet polycondensation

聚酯高效催化剂缩聚反应动力学研究

The esterification, polyesterification , polycondensation and the formation of diethylene glycol ( DEG ) reaction kinetic parameters were obtained.

获得了酯化反应 、 酯化缩合反应 、 缩聚反应以及二甘醇生成反应的动力学参数.

The N-methyl-2-pyrrolidone is chosen as polycondensation media and toluene as carrier of water.

选择N - 甲基 -2- 吡咯烷酮为反应介质,甲苯为带水剂.

The polycondensation of Terephthaloyl chloride and p-phenylenediamine hydrochloride in nmp-cacl_2 solvent system

对苯二胺盐酸盐与对苯二甲酰氯在NMP-CaCl2溶剂体系中的缩聚反应

The amelioration of the traditional method of the PLA melt polycondensation is also discussed.

综述了催化剂对聚乳酸熔融缩聚的影响,以及对乳酸熔融缩聚传统方法的改进.

Staring from D , Llactic acid , poly ( DLlactic acid ) ( PDLLA ) was directly synthesized through melt polycondensation.

以DL- 乳酸为原料, 通过熔融聚合法直接合成外消旋 聚乳酸 (PDLLA).