复合电镀（Ni—P）—SiC的新工艺

研究了复合电镀（Ｎｉ－Ｐ）－ＳｉＣ过程，发现随镀液中ＳｉＣ浓度增加，阴极极化随之增加，分散能力下降，镀液中加入混合稀土后，镀层硬度由５７４ＨＶ提高到６０２ＨＶ，相对磨损量由４．５４×１０＾－２ｇ／ｃｍ＾２下降到３．５×１０＾－２ｇ／ｃｍ＾２与Ａ３钢相对耐磨性提高４．１倍。     

复合电镀（Ni－P）－SiC的新工艺

研究了复合电镀（Ｎｉ－Ｐ）－ＳｉＣ过程，发现随镀液中ＳｉＣ浓度增加，阴极极化随之增加，分散能力下降。镀液中加入混合稀土后，镀层硬度由５７４ＨＶ提高到６０２ＨＶ，相对磨损量由４．５４×１０－２ｇ／ｃｍ２下降到３．５×１０２ｇ／ｃｍ２，与Ａ３钢相比耐磨性提高４．１倍。     

高聚合度PVC S—1700树脂的特性及性能

本文采用凝胶渗透色谱仪，差示扫描热量仪研究了高聚合度ＰＶＣ Ｓ－１７００树脂的分子量及分布，玻璃化转化温度，并对该树脂的加工行为进行了考察。试验结果表明，加低聚合度ＰＶＣ树脂相比，ＰＶＣ Ｓ－１７００树脂的分子量增大，分布变宽，Ｔｇ升高，从而导致材料的加工温度升高，力学性能提高。由材料的热老化试验表明，ＰＶＣ Ｓ－１７００还具有良好的耐老化性能。     

国产D-402型螯合树脂工业化应用试验

介绍Ｄ－４０２型螯合树脂工业化试运行情况，并与ＳＣ－４０１型树脂在物化性能、对盐水精制效果等方面作以比较，实验验证了Ｄ－４０２型树脂基本达到了进口树脂质量标准。     

白云粘胶厂硅酮耐候胶通过鉴定

１９９９年１１月１０日，由广州白云粘胶厂自主开发研制成功的广东省重点技术创新项目ＳＳ６１１硅酮耐候胶、ＳＳ６０２、ＳＳ６０２Ｂ硅酮石材胶通过省级鉴定验收。该项目产品主要用于玻璃幕墙和石材幕墙的填缝密封。目前已成功地用于上百个幕墙工程的填缝密封，其中包括我国５０周年国庆的重点献礼工程———人民大会堂外墙翻新工程和中央军委大楼的幕墙装修工程。白云粘胶厂硅酮耐候胶通过鉴定@杨海辉     

增白型SAN树脂

增白型ＳＡＮ树脂兰化１．５万ｔ／ａＳＡＮ装置是引进日本东洋工程公司－三井东压化学公司的技术和关键设备，采用热引发连续本体聚合方法生产苯乙烯－丙烯腈共聚物即ＳＡＮ树脂（又称ＡＳ树脂）。该装置自１９９１年１０月投产以来，树脂的外观稍有发黄，从而引起其制品...     

N—（β─氨乙基）氨基聚酯树脂的合成与应用

在３０３￣＃不饱和聚酯的配方基础上，改变顺丁烯二酸酐与邻苯二甲酸酥的相对用量，制备出含有一定数目碳碳双键（－Ｃ＝Ｃ－）的不饱和聚酯，而后用乙二胺与其加成得到一种水溶性树脂即Ｎ－（β─氨乙基）氨基聚酯树脂（下简称“ＳＲＡ树脂”），用ＳＲＡ树脂代替ＳＲ─１树脂分别与固色剂Ｙ及粘结剂Ｇ配成不同的增强型浸润剂进行玻璃纤维成型工艺实验，其效果优于ＳＲ─１树脂。     

丁苯透明抗冲树脂的合成和性能

以苯乙烯、丁二烯为单体，Ｓ－ＢｕＬｉ为引发剂，环己烷为溶剂，烷氧基硅烷为偶联剂，通过负离子聚合和偶合反应，再经化学处理而制得了具有星形嵌段结构的两个牌号丁苯透明抗冲树脂ＬｙＢＤＳ－０１，ＬｙＢＤＳ－０３。试验考察了聚合温度对反应速率的影响，单体配比，共聚物结构与树脂性能的关系，测试结果表明，ＬｙＢＤＳ－０３的伸长率约为ＬｙＢＤＳ－０１的１０倍，冲击强度约大１倍，硬度小于ＬｙＢＤＳ－０１。两个牌号树     

SG—5型PVC下水管件专用料研制与应用

经过改进流动性的以ＳＧ－５型ＰＶＣ树脂为基料的下水管件注塑专用料，其流动性能接近ＳＧ－７型ＰＶＣ树脂专用料。ＳＧ－５型专用料注塑的管件制品具有强度高、成本低、较易加工等特点，可完全替代ＳＧ－７型专用料。工业化生产化，经济效益明显。     

国际天然橡胶现期货价格

一、现货价格（４月２２日）品种及规格新加坡，新分泰国，泰铢１号烟片胶－２３．６０２号烟片胶１０２．５０２３．００３号烟片胶１０２．５０２２．４５４号烟片胶９８．７５２２．１５５号烟片胶９４．５０２１．７０２０号马来西亚标准胶９４．００－５０号马来西亚标准胶９２．００－５号泰国标准胶－２０．９０１０号泰国标准胶－２０．１０二、期货价格（４月２２日）约期月份新加坡商品交易所（收市价）日本商品交易所（收市价）ＲＳＳ１新分ＲＳＳ３美分ＴＳＲ２０（ＦＯＢ）美分神户日元东京日元０４———７０．０６８．８０５…     

The effect of the addition of a low profile additive on the curing shrinkage of an unsaturated polyester resin

Composites made of glass fibers and unsaturated polyester resins are widely applied for various products. The failure processes of such composites are insufficiently understood. Fracture of the resin often initiates bulk composite fracture. Residual stresses occur during the curing of the resin due to the resin volumetric shrinkage. These unfavorable stresses may enhance resin fracture. Moreover, resin shrinkage may decrease the surface quality of the product. The addition of Low Profile Additives (LPA) to the resin may decrease or even remove these problems. The shrinkage behavior of unsaturated polyester resin with varying amounts of LPA is investigated in this work. The emphasis is on the development of curing shrinkage occurring after the gel point of the resin and on accompanying shirnkage stresses. These stresses can be reduced and even reversed by the addition of LPA.     

Relation between volumetric changes of unsaturated polyester resin and surface finish quality of fiberglass/unsaturated polyester composite panels

Resin dimensional changes, including cure shrinkage and thermal expansion, highly influence the surface finish quality of composite parts. Low profile additives (LPA) are commonly incorporated in unsaturated polyester (UP) resins to compensate for resin shrinkage and obtain a high quality surface finish. In this study, the dimensional change of an UP resin with different LPA contents was characterized. Both resin cure shrinkage and resin thermal expansion were measured. A simple methodology was then developed to estimate the surface finish quality of panels, manufactured by resin transfer molding (RTM), based on the prediction of part thickness variation during the process. Results show good agreement with the experimental investigations. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers     

间戊二烯C5石油树脂改性作为柴油降凝剂的研究

间戊二烯C5石油树脂在引发剂的作用下与马来酸酐发生接枝反应,再用直链烷烃醇进行酯化,制得梳状结构的柴油降凝剂。戊二烯C5石油树脂改性制备柴油降凝剂的最佳反应条件是:各物质质量比C5石油树脂∶马来酸酐∶引发剂∶混合醇∶溶剂(二甲苯)为100∶12∶1∶20∶8,混合醇用量比C12∶C16∶C18为0.4∶0.3∶0.3,反应温度80℃,反应时间4 h,所得到的改性石油树脂降凝剂与T 602C降凝剂复配(改性石油树脂降凝剂加入量为400μg/g,T 602C加入量为1 000μg/g)对柴油具有很好的降凝效果,可将抚顺石化公司生产的-10#柴油馏分的冷滤点降低7℃。     

烧蚀复合材料用酚醛树脂的结构表征及性能

采用FTIR、GPC、DSC及TG等方法对4种烧蚀复合材料用酚醛树脂(钨酚醛树脂(WPR)、硼酚醛树脂(BPR)、高残炭酚醛树脂(HCYPR)、S-157酚醛树脂)固化前的结构、分子质量及其分布、固化历程、热失重特性进行了表征和对比,以便为烧蚀复合材料基体的筛选提供理论依据。研究结果发现,S-157PR的分子质量最小,分布最窄,浸润性最好;4种酚醛树脂的固化峰温依次为HCYPR>BPR>WPR>S-157PR;800℃残炭率依次为BPR>HCYPR>WPR>S-157PR。     

Composites from PMMA modified thermosets and chemically treated woodflour

The mechanical behavior of composites made from woodflour and a modified thermoset unsaturated polyester resin has been examined. Polymethylmethacrylate (PMMA), a common low profile additive (LPA), was used as the matrix modifier. Woodflour, the reinforcing filler, was used ‘as received’ and was also modified with a commercial alkenyl succinic anhydride (ASA), in order to enhance the compatibility with the resin. The composites exhibited higher flexural and compressive modulus and compressive yield stress than the neat resin, while flexural strength and ultimate strain were reduced. The addition of PMMA to the unfilled thermoset led to a LPA morphology and decreased the flexural modulus, but produced an increment in flexural strain at break, impact energy and toughness of the UP resin. No enhancement in the mechanical behavior of the composites was found when treated woodflour instead of unmodified woodflour was used.     

低温固化PVAc／UP体系低收缩控制研究进展

本文介绍了国外关于不饱和聚酯树脂在低温固化时,ＬＰＡ对收缩控制影响的研究。     

Control of shrinkage and residual styrene of unsaturated polyester resins cured at low temperatures: I. Effect of curing agents

In low temperature molding processes, control of resin shrinkage and residual monomer is an important concern. The presence of low profile additives (LPAs) can reduce the shrinkage of unsaturated polyester (UP)/styrene (St) resins under proper processing conditions but may increase the residual styrene content. A systematic study was carried out to investigate the effect of the initiator system and reaction temperature on sample morphology, final resin conversion, and resin shrinkage of UP resins with LPA. It was found that the final conversion of the resin system could be improved by using dual initiators. The effect is more obvious at low temperatures. Volume shrinkage measurements of the resin system initiated with dual initiators revealed that good LPA performance was achieved at low (e.g. 35 °C) and high (e.g. 100 °C) temperatures but not at intermediate ones. This can be explained by how temperature affects phase separation, reaction kinetics in the LPA-rich and UP-rich phases, micro-void formation, and thermal expansion.     

高性能酚醛树脂基烧蚀复合材料的研究

本文采用DSC、TG和GPC等测试方法对硼酚醛树脂和S-15X酚醛树脂的固化工艺、热失重特性、分子量及其分布进行了表征和对比,在此基础上对比研究了连续玄武岩纤维、S-2高强玻璃纤维、高硅氧纤维、碳纤维增强硼酚醛树脂和S-15X酚醛树脂复合材料的烧蚀性能和弯曲性能,最后考察了脱模剂对硼酚醛树脂复合材料压制工艺的影响。研究结果表明：硼酚醛树脂复合材料的烧蚀性能、弯曲性能都要优于S-15X酚醛树脂复合材料,通过使用PMR、MIRROR GLAZE代替硬脂酸作为外脱模剂,19W RELEASE代替油酸作为内脱模剂,能良好的解决硼酚醛树脂复合材料压制工艺问题。     

S-157酚醛树脂/CBFTC复合材料的研究

制备了连续玄武岩纤维平纹布(CBFTC)增强S-157酚醛树脂复合材料。研究了树脂含量对S-157酚醛树脂/CBFTC复合材料力学性能和烧蚀性能的影响,并借助扫描电子显微镜对复合材料断面的微观形貌进行了分析,同时将S-157酚醛树脂/CBFTC复合材料与S-157酚醛树脂/高强玻璃纤维平纹布(GFTC)复合材料进行了性能对比。结果表明,树脂含量在30%时S-157酚醛树脂/CBFTC复合材料的力学性能和烧蚀性能最佳;S-157酚醛树脂/CBFTC复合材料比S-157酚醛树脂/GFTC复合材料具有更好的力学性能和烧蚀性能。     

S-500型低聚合度PVC树脂的开发研究

研究了S-500型低聚合度PVC树脂的合成技术,确定了使用链转移剂合成S-500型PVC树脂的聚合配方和工艺条件。结果表明:S-500型PVC树脂相对分子质量分布集中,颗粒规整度好,粒度分布集中,熔体流动速率较高,加工塑化性能良好。