乙酸木质素-聚醚型聚氨酯的合成及其特性研究

用红外光谱研究了乙酸木质素的结构。以乙酸木质素代替部分聚乙二醇合成了聚醚型聚氨酯。采用TGA、DSC和拉伸实验对乙酸木质素合成的聚氨酯进行了热性能和机械性能的研究。结果表明：乙酸木质素具有典型的聚多元醇结构，虽然有部分被乙酰化，但它具有很好的溶解性；用木质素作原料合成的聚氨酯与典型的纯PEG型聚氨酯相比，木质素的添加使聚氨酯的玻璃化转变温度升高和在600℃以下的分解率下降，改善了聚氨酯的耐热性能；同时，添加乙酸木质素的聚氨酯的强度和伸长率与纯PEG型聚氨酯低相比有所下降。     

聚氨酯树脂在风电叶片中的应用研究

分析了聚氨酯树脂78BD085/44CP20与环氧树脂在黏度、凝胶时间以及浇注体力学性能的不同，将其与玻纤布结合采用真空灌注方式分别制备了玻纤增强复合材料(FRP),对比了聚氨酯FRP以及环氧FRP的力学性能和疲劳性能，并采用扫描电镜观察了聚氨酯FRP断面。结果表明：相同温度下，聚氨酯树脂的初始黏度比环氧树脂的更低，凝胶时间更快；聚氨酯树脂浇注体拉伸模量以及拉伸、压缩强度均高于环氧树脂浇注体15%以上；聚氨酯FRP具有优异的力学性能，拉伸、压缩以及剪切强度均高于环氧树脂FRP 7%以上；聚氨酯FRP疲劳性能满足叶片的结构设计要求；聚氨酯树脂与玻纤布具有优异的结合性。     

脂肪族聚碳酸酯聚氨酯的合成研究进展

脂肪族聚碳酸酯聚氨酯是一种新型的聚氨酯材料，它与传统聚氨酯材料相比有许多独特的性质，有关其合成与应用方面的研究受到广泛关注。综述了国内外有关该类聚氨酯合成方面的最新研究进展，并对其发展进行了展望。     

将扩建进行到底

近年来，聚氨酯行业在中国发展速度迅猛，看到了中国聚氨酯行业的潜力巨大，国内聚氨酯企业纷纷在国内进行扩产计划。目前，中国聚氨酯的主要消费地区集中在华东、华南、华北等沿海地区，在这些地区聚氨酯供需关系已经接近饱和。因此更多聚氨酯供应商，把眼光投向西部地区。西部地区有哪些在投项目？业界各方对聚氨酯产业扩建有怎样的看法？本期专题将与您共同分享和探讨。     

PFF与PUF热稳定性及燃烧性能研究

制备了酚醛泡沫和聚氨酯泡沫，并研究了酚醛硬泡与聚氨酯硬泡的热稳定性及燃烧性能。结果表明：和聚氨酯泡沫比较，酚醛泡沫的热失重小，热释放速率和热释放总量低。因此酚醛泡沫的热稳定性和阻燃性能明显优于聚氨酯泡沫。     

基布对聚氨酯合成革性能影响的研究

以涤纶非织造布，锦纶非织造布作基布，制作了聚氨酯浸渍试样，研究了其拉伸，弯曲性能，认为由于锦纶与聚氨酯的结合较强，影响了锦纶基布柔软性的发挥。当上浆率超过一临界值时，锦纶基布聚氨酯合成革已不如涤纵横在布聚氨酯合成革柔软。     

废旧聚氨酯的醇解与利用

以1，2-丙二醇醇解废旧聚氨酯得到多元醇混合物和胺类化合物，红外光谱法分析了多元醇混合物。以多元醇混合物为基础原料，与甲苯二异氰酸酯(TDI)合成聚氨酯预聚体作为聚氨酯胶粘剂的甲组分(羟基组分)，再用TDI的乙酸乙酯溶液作为聚氨酯胶粘剂的乙组分(固化剂)，从而形成一种双组分聚氨酯胶粘剂。研究了两组分的配比关系及各种添加剂用量对聚氨酯胶粘剂性能的影响。     

有机硅在聚氨酯中的应用

综述了有机硅在聚氨酯材料中的应用。聚硅氧烷可与聚氨酯形成共聚物，用于医学材料等；有机硅化合物还用作聚氨酯的改性剂，用于涂料，胶粘剂，密封剂，涂饰剂，织物整理剂等领域。对于提高聚氨酯性能，有机硅是一类十分有用的化合物。     

春天里的约会——第二届中国聚氨酯市场与技术论坛圆满落幕

俗话说“一年之计在于春”，3月10日、11日，200多名聚氨酯界的精英人士在环球聚氨酯网的组织下，齐聚上海，参加“第二届中国聚氨酯市场与技术论坛”，共商聚氨酯大计。本次会议是继2004年2月环球聚氨酯网(时为中国聚氨酯网)成功举办首届中国聚氨酯市场与技术论坛的基础上举办的第二届论坛。     

热塑性聚氨酯弹性体及其应用前景

一、概述聚氨酯弹性体是聚氨酯合成材料中的一个品种（其它品种是指聚氨酯泡沫塑料、聚氨酯粘合剂、聚氨酯涂料和聚氨酯纤维），而热塑性聚氨酯弹性体又是聚氨酯弹性体的三大类型中的一种，人们习惯称它为TPU（另外两大类聚氨酯弹性体分别是浇注型聚氨酯弹性体简称CPU和混炼型聚氨酯弹性体简称MPU）。TPU是一类加热可以塑化、溶剂可以溶解的聚氨酯弹性体，与CPU和MPU相比较，TPU在化学结构上没有或很少有化学交联，其分子链基本上是线性的，然而却存在一定量的物理交联，这就是下面要介绍的在结构上很有特点的热塑性聚氨酯弹性体。…     

软包装用聚氨酯胶黏剂发展近况

简要介绍了软包装及所用聚氨酯(PU)复膜胶的迅猛发展历程.分别介绍了溶剂PU胶黏剂、醇溶PU胶黏剂、无溶剂PU胶黏剂和水性PU(WPU)胶黏剂的发展概况及其优缺点.随着技术进步和环保意识的增强,PU复膜胶由溶剂型逐步向无溶剂、水性方向发展.还介绍了将丙烯酸酯基团引入WPU主链以降低成本、改进某种性能、引人双键等方面的研...     

聚氨酯／碳纳米管复合材料的研究进展

近年来,利用碳纳米管制备聚氨酯复合材料引起人们的高度重视。本文对聚氨酯/碳纳米管复合材料的研究进展状况进行综述。概述了聚氨酯和碳纳米管的性质以及碳纳米管的改性处理方法;介绍了聚氨酯/碳纳米管复合材料的制备方法,包括物理共混法和原位聚合法;讨论了碳纳米管对复合材料力学性能、电学性能、光学性能以及其他性能的影响。结果表明,碳纳米管的加入使得复合材料在上述性能方面都有不同程度的改善。最后探讨了该研究领域存在的问题及今后可能的发展方向。     

我国聚氨酯胶粘剂的发展现状及趋势

评述了我国聚氨酯胶粘剂的发展现状和趋势,对一些主要胶种如鞋用聚氨酯胶、通用型聚氨酯胶、复合膜用聚氨酯胶粘剂、单组份聚氨酯液体胶、无溶剂聚氨酯结构胶、水性聚氨酯胶粘剂、单组份湿固化聚氨酯密封胶、聚氨酯泡沫密封剂、反应型聚氨酯热熔胶等的发展状况、市场和趋势分别作了概述。     

Dual-curing of anionic aqueous-based polyurethanes at ambient temperature

Polyurethane (PU) prepolymers are prepared by a polyaddition of isophorone diisocyanate, polypropylene glycol-1000, and 2,2-dimethylolpropanic acid. The anionic aqueous-based PU dispersions are derived from a water dispersion process of these NCO-terminated PU prepolymers together with a neutralization and a chain extension. They have both terminal amino and pendent carboxylic groups which are potentially reactive sites toward a di-functional epoxy and a tri- or di-aziridinyl compound of a dual-curing PU system, respectively. The stabilities of the resulting PU dispersions on zeta potential and particle size distributions are investigated. The improvements on mechanical, physical, and thermal properties of these dual-cured PU systems are also evaluated. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:1661–1671, 1998     

Interpenetrating polymer networks of polyurethane and furfuryl alcohol. I. Morphology and mechanical properties

Polyurethane/furfuryl alcohol (PU/FA) interpenetrating polymer networks (IPNs) were synthesized from furfuryl alcohol using p-toluene sulfonic acid as a catalyst and blocked NCO-terminated PU prepolymer with m-xylylenediamine (MXDA) as a chain extender. From IR spectrum analysis it was found that the major reactions in the PU/MXDA/FA system are the polymerization of PU/MXDA and the self-polymerization of FA. The tensile strengths of PU/FA IPNs that contain 5 p.h.r. PU are greater than those of the pure components. The flexural strength, flexural modulus, Shore D hardness and HDT decrease and the notched Izod impact strength increases with the polyurethane content. The compatibility of the compounds in these PU/FA IPNs was investigated by dynamic mechanical analysis and scanning electron microscopy. It was found that glass transition temperatures are shifted inwardly which indicated that the PU/FA IPNs were semicompatible. It was confirmed from scanning electron micrography that the system was heterogeneous.     

The Mechanical and Tribological Properties of Anodic Oxidation Treatment Carbon Fiber-Filled PU Composite

The interfacial adhesion of the carbon fiber (CF) reinforced polyurethane (PU) composite was improved by the means of anodic oxidation treatment. The mechanical and reciprocating sliding wear properties were studied and results showed that the anodic oxidation treatment have definitely improved the mechanical strength. And the wear and the friction coefficient of PU decreased with the addition of CF. The friction coefficients of anodic oxidation treated CF/PU composites are lower than those of PU and CF/PU composite. The interfacial adhesion between the CF and PU dominated the main wear mechanisms.     

Single component self‐curable aqueous‐based PU system with new aziridinyl curing agent

The self‐emulsified aqueous‐based polyurethane (PU) consists of carboxyl group, which is an ionic center not only stabilizing the aqueous polymer dispersion but also serving as the curing site toward aziridinyl curing agent. Two new aziridinyl curing agents, HDI‐AZ and ADA‐AZ, are prepared from an addition reaction of aziridine to hexamethylene diisocyanate (HDI) and adipic acyl chloride (ADA), respectively. These curing agents are added separately into NCO‐terminated PU prepolymer before or after the water dispersion process. The resulting PU dispersion becomes a single component self‐curable aqueous‐based PU system. The cured PU is obtained from this single component PU dispersion on drying at ambient temperature. The improved PU properties demonstrate the feasibility of this convenient single component self‐curable aqueous‐based PU system. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91:1997–2007, 2004     

中国汽车用聚氨酯材料发展方向

轻量化、绿色环保和舒适安全性将成为我国汽车用材料未来发展方向,而聚氨酯（Pu）是实现汽车轻量化、塑料化的关键材料。其中纤维增强Pu复合材料、微孔木质纤维复合材料、TPU合金、TPU复合材料、生物降解PU材料和Pu轮胎将是汽车用PU材料未来重要发展方向。     

水性环氧改性聚氨酯乳液的制备与讨论

在制备水性聚氨酯基础上引入了环氧树脂,制得了水性环氧改性聚氨酯乳液。环氧树脂的引入增加了水性聚氨酯的交联结构,与改性前的水性聚氨酯相比,其涂膜耐水性、耐溶剂性以及机械性能都得到了提高。并研究了环氧树脂的引入方法及环氧树脂加入量对分散体及其涂膜性能的影响。傅里叶红外光谱分析显示出了环氧树脂与水性聚氨酯之间存在化学键的连接...     

Fabrication of Biodegradable Polyurethane Foam Scaffolds with Customized Shapes and Controlled Mechanical Properties by Gas Foaming Technique

Poly(ε-caprolactone) (PCL)-based polyurethane (PU) foam scaffolds with different mechanical properties are fabricated using a gas foaming technique to use as porous substitutes for ear or bone with cartilage. PCL diol or triol is used as a polyol in PU foam for biocompatibility and biodegradation, with an aqueous gelatin solution as a blowing agent. The highly porous inner and outer structures of the scaffolds are developed by employing a silicone surfactant and sulfuric acid, respectively. The PU scaffolds prepared by PCL diol show ductile and flexible properties, whereas the PU scaffolds prepared by PCL triol exhibit high compression strength. In vitro test reveals the low toxicity of the PU scaffolds and the high ALP activity of MC3T3-E1 cells in the PU scaffold prepared by PCL triol. By taking advantage of the difference in mechanical properties, customized PU scaffolds with ear or bone shapes are fabricated using a silicone mold. The PU scaffolds with two compartments of PCL diol and triol (corresponding to cartilage and bone, respectively) are fabricated as a substitute for bone with cartilage. It is believed that the PU scaffolds with highly porous structure and controlled mechanical properties have wide potential application for tissue engineering.