polycondensation相关论文
The urea-formaldehyde resin/reactive montmorillonite composites were prepared by in situ polymerization. The reactive mo......
A series of dimer acid-based polyamides were synthesized by melt-polycondensation of dimer acid and various aromatic dia......
Among the family of eco-friendly polymers PLA is the most important synthetic polyester which finds significant biomedic......
Poly(lactic acid) can be produced by the ring opening polymerization of lactide, or by the direct polycondensation of la......
简短讨论在更低的成熟舞台期间在煤被给可溶的有机物(SOM ) 的热导致 polycondensation，基于从煤的烃产生上并且在与煤的自然成熟的......
With monomer of A_aB_b type, the polymer moments of polycondensation reaction is inves-tigated in detail by means of dir......
Synthesis and characterization of new optically active and organosoluble poly(ester-imide)s based on
New optically active poly(ester-imide)s PEIs were prepared from newly synthesized N,N′-(bicyclo[2,2,2]oct-7-ene-2,3,5,6......
Synthesis and characterization of optically active and organosoluble poly(amide-imide)s containing i
Six new optically active poly(amide-imide)s(PAIs) 6a-f were prepared by direct polycondensation reaction of N-trimelli-t......
Cross-linked Polyamides Prepared through Direct Bulk Michael Addition and Polycondensation from 1,6-
Cross-linked polyamides (cPAs) were prepared through direct bulk Michael addition and subsequent polycondensation.Severa......
以丁二胺、己二酸为原料,经过成盐、预聚、后聚3个步骤得到黏均分子质量为40 000左右的聚酰胺46(PA46),并详细考察了PA46盐p H、预......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
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为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
SYNTHESIS AND CHARACTERIZATION OF OPTICALLY ACTIVE POLY(AMIDE-IMIDE)S CONTAINING PHOTOSENSITIVE CHAL
A series of new optically active poly(amide-imide)s were synthesized by direct polycondensation reaction of 4,4’-diamin......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
SYNTHESIS OF ORGANO SOLUBLE AROMATIC POLY(AMIDE-IMIDE)S BASED ON 2-(5-(3,5-DINITROPHENYL)-1,3,4-OXAD
In this work,the syntheses of new thermally stable poly(amide-imide)s with pendant 2-pyridyl-1,3,4-oxadiazole units in n......
DEGREE OF BRANCHING OF THE HYPERBRANCHED POLYMERS RESULTED FROM AB2 POLYCONDENSATION WITH SUBSTITUTI
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
A diamine was synthesized by two successive reactions.Nucleophilic reaction of 4-hydroxybenzoic acid with terephthaloyl ......
SYNTHESIS AND CHARACTERIZATION OF BIODEGRADABLE POLYESTERAMIDES CONSTRUCTED MAINLY BY ALTERNATING DI
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Organosoluble Aliphatic-Aromatic Poly(ether-amide)s Based on Pyridine Moiety in the Main Chain: Synt
A series organosoluble and heterocyclic poly(ether-amide)s(PEA)s were synthesized from a new diamine containing pyridine......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Thermally Stable and Organo-soluble Polyamides Containing Triazine Rings and Ether Linkages in the M
In order to synthesize new polyamide(PA) 5 and copolyamides(Co PA) 7a-7d, a new-type of dicarboxylic acid containing tri......
In this work, two new diacids, di(m-carboxyphenyl) succinate (m-dCPS) and di(o-carboxyphenyl) succinate (o-dCPS), were s......
Direct melt/solid polycondensation of lactic acid (LA) was carried out to obtain high molecular weight poly(lactic acid)......
A new diamine containing sulfone,sulfide and amide groups was synthesized via a three-step reaction process. The nucleop......
A diamine containing ether and ester units,as basic monomer for the preparation of polyamides,was prepared via three con......
1IntroductionIn this paper, a novel water-soluble block copolymer with rod-coil structures was prepared using polyfluore......
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Ethylene glycol aluminum was prepared efficiently and characterized by FT-IR and NMR. It exhibited higher catalytic acti......
本文用糖醇和糖醛缩聚制得ＴＪ型呋喃树脂。通过大量实验，找出了各组份间的适当配比，得到了一种高粘结强度的呋喃树脂。本产品经厂方应用......
介绍本装置在超负荷运行时提高产品等级品率的经验，找出影响产品质量的主要因素是端羧基值和凝聚粒子含量，制定了几种不同负荷下的标......
通过三缩三乙二醇二胺和己二酸的缩聚反应合成了一种改性的聚酰胺（聚己二酰三缩三乙二醇二胺），利用全反射傅里叶红外变换光谱和核磁共......
借助微波辅助手段，以天冬氨酸（A）为原料，在均三甲苯和环丁砜混合溶剂中，以磷酸（体积分数为85％）为催化剂进行聚合反应。考察了催化剂用量、......
讨论了桐油改性酚醛树脂粘合剂体系的合成工艺和性能。并用红外光谱分析了产品的结构。此外，还从两个不同的角度出发，进一步在该体系......
介绍了一个工业化聚酯（ＰＥＴ）生产过程中的缩聚模型。模型从聚合反应机理出发，考虑了所有的主反应和主要的副反应，以实测的工艺操作参数为输......
以三羟甲基丙烷和二羟甲基丙酸为原料,在对甲苯磺酸催化下合成了端羟基超支化聚酯,8-[4’-丙氧基(1,1-联苯)-氧]-辛酸为封端剂对超......
<正> 侧链液晶聚合物的合成方法,可归纳为3类:一是烯基的单体,如甲基丙烯酸酯,或丙烯酸酯,氯代丙烯酸酯等,经自由基聚合反应,阴离......
<正> 离子性聚合物的合成方法主要集中于通过一些含芳环聚合物的大分子反应,引入不同的离子基。如聚苯乙烯、聚芳醚砜、聚芳醚酮的......
研究了在对苯地甲乙二酯缩聚反应中催化剂用量，反应时间、反应温度的影响。研究结果表明，随着催化剂用量增加。反应速度提高，ＰＥＴ的特性粘......
以丁二酸和乙二醇为原料,采用缩聚扩链法合成了同时带有端羧基和端羟基的聚丁二酸乙二醇酯预聚体（PrePES）,用1,4-双（2-噁唑啉）苯和己二......
针对聚酯装置更换不同厂家ＰＴＡ所出现的生产波动问题做了介绍，进行了一系列生产控制实验，摸索出一整套适用于生产控制的工艺参数，实现了生......
研究了Sb2O3和C-94两种催化剂对于PET缩聚反应的动力学.结果表明,在相同条件下C-94的催化活性明显高于常规的Sb2O3催化剂;C-4的表......
选择乙二醇锑以及至少一种锰、锌、钙、钴、铅等金属醋酸盐共同组成高效催化剂,在1万 t/a连续聚酯装置上研究它们对缩聚反应的催化......
综述PTT的聚合纺丝、后加工技术及纤维的性能.指出PTT集良好的可加工性、机械性、热塑性、延伸性、高弹性、尺寸稳定性和染色性等......
传统的二元醇与二元酸缩聚反应动力学计算中,常常忽略体系体积的变化对动力学参数的影响。本文考虑了反应体系体积变化的影响,推导......
用２，６二氟苯甲腈和间苯二酚为原料，在碱性条件下，于非质子极性溶剂中，通过溶液高温缩聚法制备聚芳醚腈［Ｐｏｌｙ（ｃｙａｎｏａｒｙｌｅｔｈｅｒ）ＰＣＥ］．并用ＩＲ、ＤＳＣ、ＴＧ、ＷＡＸＤ等手段对其结构及热性......
以2，3-丁二酮为原料，通过卤化等反应制备2，2’-二氨基-4，4’-双噻唑（DABT），然后采用低温界面缩聚反应，将刺备得到的含双噻唑席夫碱二酚与苯......
为解决反应器分布管堵塞导致分布管压差上涨问题,寻求解决方法。对影响反应器分布管堵塞的因素,如MTO装置急冷水、水洗水、浓缩水......
A two-step process was used to synthesize the high molecular weight poly (lactic acid) using thionyl chloride as an acti......
本文应用力化学理论和煤结构分析方法，研究了煤的力化学作用类型、力化学能量来源及煤结构演化的影响因素，探讨了构造煤形成的力化学......
