饱和聚酯树脂相容性研究

文章讨论了几种饱和聚酯树脂之间,饱和聚酯树脂与氨基树脂、丙烯酸树脂、CAB之间的相容性情况,并对涂料用树脂相容性的影响因素作了简要的分析。     

酚醛树脂与热塑性树脂的共混研究进展

综述了酚醛树脂与热塑性树脂共混研究的最新进展.介绍了热塑性树脂增韧酚醛树脂的相容性和相行为.酚醛树脂改性热塑性树脂,提高热塑性树脂的力学性能和阻燃性,以及利用酚醛树脂的活性基团改善不相容热塑性树脂共混体系的相容性的研究进展.     

丙烯酸树脂与环氧树脂的相容性研究

在三角图中对甲基丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸单体的三元组成进行设计，用自由基溶液聚合法合成了一系列不同单体配比的丙烯酸树脂。用共溶剂法及光学显微镜法研究了合成的丙烯酸树脂与环氧树脂的相容性，将丙烯酸树脂与环氧树脂的相容性分为从相容到不相容的三类。用浊度法和匹配溶解特性法测定了丙烯酸树脂和环氧树脂的一维溶度参数和三维溶度参数，分析结果表明三维溶度参数和重叠因子可以更准确地预测树脂间的相容性。     

超支化聚合物改性醇酸树脂的性质研究

在合成醇酸树脂中,采用端基为羟基的超支化聚合物代替多元醇,对醇酸树脂进行改性,考察了改性后醇酸树脂与固化剂和丙烯酸树脂的相容性。研究发现：改性后的醇酸树脂与固化剂相容性很好．与丙烯酸树脂相容性较差。利用改性后的醇酸树脂制备的漆膜具有很好的透明性和柔韧性。     

胶粉/热塑性树脂共混技术研究进展

综述了胶粉/热塑性树脂共混的技术研究进展.对胶粉的制备、表面改性及胶粉与热塑性树脂的相容性做了总结.     

油墨专用改性双环戊二烯石油树脂的合成

双环戊二烯石油树脂已在包括新闻纸印刷、凸版印刷、活版印刷、平版印刷、照相版印刷等油墨中得到了应用。但由于双环树脂中没有极性基团,所以双环树脂与干性油相容性较差。本文使用顺丁烯二酸酐对双环戊二烯石油树脂进行改性,使得改性后树脂与干性油有良好的相容性,可以广泛应用于油墨制造。     

增黏树脂与聚苯乙烯、聚异戊二烯的相容性

选取了六类增黏树脂,分别与PS(聚苯乙烯)或PI(聚异戊二烯)在甲苯溶剂中共混,利用涂布后的透明度对相容性进行了定性测定;利用共混物的玻璃化转变温度对相容性进行了定量分析。研究结果表明:根据透明度和相容性得到的数据,可以预测增黏树脂加入SIS后PI相和PS相的相态组合。这种方法能更清晰地表征增黏树脂在两种聚合物和不同SIS聚合物中的存在方式,可以指导SIS热熔压敏胶的配方设计。     

相容剂在ABS合金研制中的应用

综述了国外利用相容剂制造ABS合金的近期发展情况,ABS树脂与大部分树脂掺混时相容性都不太好,而通过利用相容剂就能有效地改善两种不相容树脂的相容性,制造出满足各种性能要求的ABS塑料合金.     

蒎烯树脂对EVA(树脂)热熔胶性能的影响

将增粘剂(萜烯2种异构体)α-蒎烯树脂和β-蒎烯树脂分别与EVA树脂混合,做平行对比实验。结果表明,α-蒎烯树脂与EVA的相容性好,对EVA的增粘效果显著,所得热熔胶粘附强度大、软化点低;β-蒎烯树脂与EVA的相容性差,所得热熔胶粘附强度小、软化点高。     

增粘树脂对丙烯酸酯压敏胶性能的影响

介绍了增粘树脂与丙烯酸酯压敏胶的相容性 ,及对其压敏性能的影响     

石油树脂对热熔胶、压敏胶粘接性能的影响

介绍了石油树脂的分类、增粘树脂的结构特点,国内外热熔胶、压敏胶用石油树脂发展,热熔胶对石油树脂的性能要求;论述了石油树脂与聚合物之间的相客性、石油树脂的软化点、熔融粘度等对热熔胶粘接性能的影响,展望了石油树脂的生产和发展方向.     

Effects of low-profile additives on the curing reaction of unsaturated polyester resins

The effect of low-profile additives (LPA), i.e., poly(vinyl acetate) (PVAC) and poly(methyl methacrylate) (PMMA), on the curing reaction of unsaturated polyester (UPE) resins was studied by gel permeation chromatography (GPC) and differential scanning calorimetry (DSC). The curing reaction profiles were determined by DSC, while GPC was used to investigate the variation of the sizes of microgel particles during the early stage of curing reaction in UPE–styrene resins. The DSC experimental results indicated that the curing reaction rate decreased as the concentration of LPA increased. At a fixed LPA concentration, the curing reaction rate was slower for resins mixed with LPA possessing worse compatibility with UPE resins. During the early stage of curing reaction, the size and structure of the UPE microgels formation strongly depended on the concentration of LPA and also on the compatibility of the components in the curing system. The experimental results of this study revealed that the concentration of LPA and the compatibility of LPA with UPE resins had a strong influence on the polyester microgel formation and the curing behavior. © 1995 John Wiley & Sons, Inc.     

增黏树脂与弹性体SBS的相容性以及与热熔压敏胶性能的关系

热熔压敏胶(HMPSA)是一类不含溶剂的胶粘剂,在工业应用中占据很大的比重。工业上常用的增黏树脂有松香树脂、萜烯树脂和石油树脂三种。增黏树脂与热塑性弹性体SBS(苯乙烯/丁二烯/苯乙烯嵌段共聚物)的相容性存在一定的差异性,从工业角度重点研究和比较了增黏树脂的结构差异与性能之间的关系,并对其一般规律进行了探索。研究结果表明,当增黏树脂的软化点为100～110℃时,相应的HMPSA可获得较低的熔融黏度和较高的剥离强度,其初粘力为1～2cm;当增黏树脂的软化点为100℃时,剥离强度依次为含萜烯树脂HMPSA>含松香树脂HMPSA>含石油树脂HMPSA;当W(增黏树脂)= 210%时(相对于弹性体SBS而言),含石油树脂HMPSA的综合性能劣于含松香树脂(或含萜烯树脂)的HMPSA;当W(增黏树脂)≥210%时,HMPSA的熔融黏度低于10000mPa·s,但持粘力增强(即意味着内聚力增强)。     

二乙二醇丁醚改性TDI-三聚体的合成及表征

用自制催化剂合成了二乙二醇丁醚改性TDI-三聚体。实验表明，反应的-NCO／-OH投料物质的量之比控制在10：1左右可以得到性能优良的TDI-三聚体。该合成方法可以采用混合溶剂，降低生产成本。用红外光谱(FT—IR)、凝胶色谱(GPC)和热重分析(TGA)对改性物结构和热稳定性进行了表征。合成的改性物对羟基树脂有极好的相容性，可以与羟基丙烯酸树脂配成涂料。用SEM对涂膜做了表面分析，由涂膜性能检测知：随三聚体改性程度的加深，涂膜干燥时间延长，硬度降低，但涂膜的耐冲击性能提高。     

Compatibility of epoxidized natural rubber with thermoplastic and thermosetting resins

The compatibility behavior of epoxidized natural rubber (ENR) at two different degrees of epoxidation with hydroxyl-containing polymeric resins was investigated. These included Novolac and Resole resins, the cured epoxy of bisphenol A (CER), and phenoxy. For each system, compositions covering the complete range were studied using the dynamic mechanical (DMA), DSC and phase-contrast microscopy techniques. ENR/Novolac blends were compatible, ENR/Resole, and ENR/phenoxy semicompatible, and ENR/CER incompatible. The results were interpreted in terms of the acid character of the aromatic or aliphatic hydroxyl contained in the resin and a predictive compatibility scheme based on copolymer-copolymer miscibility theory was tested.     

Halogen‐free flame retardant epoxy resins from hybrids of phosphorus‐ or silicon‐containing epoxies with an amine resin

Epoxy–melamine hybrid resins were obtained from in situ polymerization of siliconized (SE500) and phosphorylated (PE690) epoxy resins with hexakis(methoxymethyl)melamine (HMMM). The hybrid resins having HMMM contents less than 15 wt % exhibited high transparency and homogeneity. The compatibilities between SE500 and melamine as well as that between PE690 and melamine were poor than the compatibility between general bisphenol‐A epoxy and melamine. Incorporation of HMMM altered the degradation mechanisms and enhanced the thermal stability of the epoxy resins, especially for PE690 based resins. Excellent flame retardant property was observed with the hybrid resins because of the Si? N and P? N synergisms of flame retardation. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1071–1077, 2006     

苯乙烯——马来酸酐共聚物及其合金

介绍苯乙烯－马来酸酐共聚物的性能与应用，着重介绍它与尼龙，苯乙烯－丙烯腈共聚物，ＡＢＳ、ＰＣ、橡胶弹性体，ＰＶＣ及ＰＢＴＰ等的合金的研究开发状况，该共聚物与上述高聚物的相容性良好，能改善尼龙的吸湿性和尺寸稳定性，赋予其它树脂高耐热性及优异的加工性能。     

以工业回收PS为载体的ABS用填充母料研制

以工业回收聚苯乙烯(IR-PS)为载体树脂,加入适量助剂与无机填料制成了ABS用填充母料(SM)它与ABS树脂相容性好,且降低了ABS制品的成本。本文从原材料选择、填充母料的物理性能、填充后ABS塑料的加工性能、制品的光学性能及实际应用效果等方面对该种填充母料的研制做了介绍。     

Development of hot-melt pressure–sensitive adhesives for transdermal drug delivery

Styrene–isoprene–styrene (SIS) copolymer was epoxidized by in situ epoxidation to prepare a series of epoxidized SIS resins (ESIS). Their epoxidation degrees, phase structures, and compatibility with hydrocarbon resin were characterized with ¹H nuclear magnetic resonance spectroscopy, atomic force microscopy, and differential scanning calorimetry, respectively. These ESIS resins were melt-mixed with synthetic hydrocarbon resin, mineral oil, and antioxidants to fabricate a series of ESIS-based hot-melt pressure–sensitive adhesives (HMPSAs), which were used as carriers of transdermal drug delivery system. Their adhesive performances were measured, including holding power and 180^o peel strength. Geniposide and oleanic acid were representatively chosen as hydrophilic and lipophilic drug, respectively. Their in vitro release behaviors in ESIS-based HMPSAs were investigated using a modified Franz-type horizontal diffusion cells. Although the introduction of epoxide groups could alter the compatibility and phase structures between SIS resins and additives, the adhesive performances were slightly affected, as SIS resins had lower epoxidation degree (<15%). It is even more important that the cumulative release rate of both hydrophilic and lipophilic drugs is markedly enhanced with the increase of epoxidation degree in these ESIS-based HMPSAs. Therefore, this kind of HMPSAs has a promising future as a carrier of transdermal drug delivery system as their SIS resins are appropriately epoxidized.