工业评述2001～2002年国外塑料工业进展

收集了2001年7月到2002年6月有关国外塑料工业的相关期刊资料,介绍了2001年到2002年国外塑料工业的发展情况,提供了世界各地域塑料原材料的产量及构成比,日本、美国、加拿大、德国、法国、比利时、墨西哥、芬兰、西班牙等国家的树脂产量、消费量及增长率,以及日本、西欧、北美等地区的不同品种塑料原料消费量和增长率统计.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、通用热固性树脂(酚醛、聚氨酯、不饱和树脂、环氧树脂)、特种工程塑料(聚苯硫醚、液晶聚合物、聚醚醚酮)不同品种的顺序,对树脂的产量、消费量及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等有关技术作了详细的介绍.     

2006～2007年世界塑料工业进展

收集了2006年7月～2007年6月世界塑料工业的相关资料,介绍了2006～2007年世界塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

1998～1999年国外塑料工业进展

收集了 1998年 7月到 1999年 6月国外塑料工业相关期刊资料 ,介绍了 1998～ 1999年国外塑料工业进展。提供了日本、美国、加拿大、德国、法国、比利时、意大利、英国、西班牙、匈牙利、马来西亚等国通用热塑性树脂、工程塑料、通用热固性树脂、特种工程塑料的产量和增长率 ,提供了美国、日本、德国、韩国、法国、比利时、荷兰、意大利和其他国家以及亚洲、欧洲、北美洲、中南美洲、非洲和大洋洲等地域的树脂产量及构成比 ,此外还提供了中国台湾的树脂产量。按通用热塑性塑料、通用热固性塑料、通用工程塑料和特种工程塑料分类 ,对其合成工艺、树脂品种延伸、新的应用开发等工业技术作了详尽的介绍     

国内外丁基橡胶生产现状及市场前景

丁基橡胶()是世界上第四大合成橡胶(SR)IIR胶种,是异丁烯和异戊二烯在Friedel-Craft催化剂作用下进行阳离子聚合反应的产物。由于丁基橡胶具有优良的气密性和良好的耐热、耐老化、耐臭氧、耐溶剂、电绝缘、减震及低吸水等性能,使得其在内胎、水胎、硫化胶囊、气密层、胎侧、电线电缆、防水建材、减震材料、药用瓶塞、食品(口香糖基料)、橡胶水坝、防毒用具、粘合剂、内胎气门芯、防腐蚀制品、码头护舷、桥梁支撑垫以及耐热运输带等方面具有广泛的应用。一、世界丁基橡胶生产现状及市场前景1.生产现状目前,世界上只有美国、德国、俄罗斯、…     

树脂基复合材料成型工艺研究进展

主要综述了树脂基复合材料的几种成型工艺,包括RTM、VARTM、CRTM、LRTM、RFI、VARI、SCRIMP、SRIM、TERM,各自的发展现状、成型原理、特点等.     

沁阳市沁龙化学防腐有限公司

<正>河南省沁阳市沁龙化学防腐有限公司是从事研制生产多功能新型螺旋溜槽、摇床、旋流分级机、磁选机、浮选机、搅拌槽、打砂机、玻璃钢冷却塔、风机、管道、防腐贮罐等多种产品的专业公司,已有近三十年的生产历史,通过了ISO9001:2000质量体系认证。主导产品为多功能新型螺旋溜槽、摇床,是选别有色金属、黑色金属、非金属、贵重金属的理想选矿设备,如金矿、银矿、沙金矿、锡矿、钛铁矿、硫铁矿、赤铁矿、褐铁矿、铬铁矿、钨矿、钽泥矿、煤矿、独居石、蓝宝石、重晶石、金红石、锆英石、硅砂等。现有8000多台设备在全国各地矿山使用。在鞍钢、马钢、首钢、包钢、唐钢、安钢、武钢、柳     

业态分散 规模偏小 品牌难提升 生意冷清 竞争激烈 商家难支撑——商丘 亳州 阜阳泛家居行业经销商调查报告

10月27日-11月20日,笔者一行4人对河南商丘、安徽毫州、阜阳3个市的市区和郊区泛家居行业进行了普查,共走访调查经销商1250多家,走访各种规模的建材城、建材街、家具市场、装饰建材市场10个,填写《全国泛家居行业经销商普查表》1200多份,调查涵盖陶瓷、卫浴、家具、橱柜、衣柜、厨房电器、五金锁具、楼梯、门窗、地板、涂料、淋浴房、家装、红木、木雕、吊顶、竹家居、石材、管材、建材、水暖、太阳能、灯饰LED、饰品、地毯、木制品、铁艺、布艺、墙纸、家纺、晾衣架、背景墙、隐形纱窗等30多个泛家居细分行业。     

浅谈化学品仓库火灾的扑救

化学品仓库集中存放着许多化工产品，这些产品性质复杂，多数有易爆、易燃、有毒、有腐蚀性的特点，扑救这类化学品的火灾是一项比较复杂的工作。如不能用水（包括水蒸气和含水的泡沫剂）扑救的化学品就有金属钠、钾、钙、镁、钍、铝粉、铝镁合金、氰化钠、硼氢化物、电石、磷化钙、发烟硫酸、氯磺酸、三氯化磷、五氯化二磷、无水氯化铝、过氧化钠、氯化硫酰、四氯化硅、五氨化锑、氯乙酰、苯基氯硅烷等忌水物质。     

传统手工艺的当代价值

自然界,为人类提供了生存、生活,以及进行创造的物质基础。人们在自然界的劳动实践中,获取了竹、木、柳、藤、草、棉、革、漆、土、玉、石、陶、瓷、金、银、铜、铁、锡等成为生活用品的材料。随着造物活动的扩大,人们也创造了与这些材质相适应的雕、镂、刻、削、染、缝、绘、髹、铸、琢、磨等工艺。     

秦皇岛玻璃工业研究设计院矿山所为您提供

正硅砂、砂岩、长石、白云石、石灰石等玻璃原料的实验室及半要业试验硅砂、砂岩、长石、白云石、石灰石等玻璃原料的采矿、选矿设计和工程总承包硅砂、砂岩、长石、白云石、石灰石矿的技术改造及技术咨询     

对苯二异氰酸酯型聚氨酯弹性体的合成及性能研究

以对苯二异氰酸酯(PPDI)、低聚物多元醇和小分子二元醇等为原料合成了PPDI浇注型聚氨酯弹性体,考察了不同低聚物多元醇对弹性体的物理机械性能、动态力学性能及热氧老化性能的影响,并与MDI和TDI型聚氨酯弹性体进行了比较。结果表明,PPDI型聚氨酯弹性体较MDI、TDI型弹性体具有更低的内生热、更高的回弹性,可用于轮胎胎面材料的制备。     

Patterning of soft polydimethylsiloxane elastomers using plasma etching

Soft polydimethylsiloxane (PDMS) elastomers spin coated on silicon wafers are patterned using plasma etching. The elastomers are formed by mixing vinyl‐terminated PDMS (prepolymer) and crosslinker containing hydride sites. The elastomers are made softer by adding either excess prepolymer, excess crosslinker, or swelling agent. The different elastomers were etched using reactive ion etching, an old and well established processing technology in the microelectronic and MEMS industry. The etch rate and profiles of the etched surfaces were dependent on the process pressure. The dependence was different for the different elastomers. It was found that at low pressure, the etch rate was dependent on the shear modulus. At high pressures, the etch rate was dependent on the chemical composition of the elastomer. The results for the swollen elastomers were different from those for the nonswollen elastomers. The etch rate was lower and the profiles of the etched cavities were different. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

三官能度聚醚型聚氨酯弹性体的力学性能研究

以三官能度的聚醚多元醇、1,4-丁二醇和二苯基甲烷二异氰酸酯(MDI)为主要原料合成了聚氨酯弹性体。研究表明,硬段质量分数超过50%以后,伸长率降低,交联时间对聚氨酯(PU)弹性体整体的力学性能影响不大。在保持异氰酸酯指数为1.0和MDI含量不变的条件下,把1,4-丁二醇和聚醚多元醇的羟基摩尔比提高到1.50:0.33,材料的力学性能最佳。随着交联时间的增加,拉伸强度及硬度先增大后减小,伸长率呈减小的趋势。     

环氧改性生物降解聚氨酯弹性体的合成和性能研究

由聚己内酯（PCL）和聚乙二醇（PEG）分别与1,6-亚甲基二异氰酸酯（HDI）合成端异氰酸酯基聚氨酯,再与缩水甘油反应制备环氧改性聚氨酯（EUP）;六亚甲基二胺（1,6-己二胺,HMDA）作固化剂,与环氧改性聚氨酯（EUP）反应合成生物降解聚氨酯弹性体。这种弹性体的生物降解率可控制,物理性能优良。常规方法进行表征。结果表明,PEG基弹性体的降解性能优于PCL基弹性体,而机械性能则低于PCL基弹性体;PCL和PEG混合制备的EUP降解性能和机械性能最佳。     

聚醚/液化改性MDI型聚氨酯弹性体的合成及其性能的研究

用液化改性MDI、聚醚多元醇为原料，ED或BD为扩链剂，合成一系列不同硬段结构的聚氨酯弹性体，并对这些聚合物进行了红外结构、力学性能以及溶解性能的研究，并就其现象进行了理论上的分析。     

Cast polyurethane elastomers with improved dynamic fatigue resistance

Cast polyurethane (PU) elastomers have been widely used in dynamic applications, such as rollers and wheels, where a low heat buildup, high-loading resistance, and good cut-growth resistance are desired. Because of their different molecular structure, cast PU elastomers do not perform in the same way in highly demanding dynamic applications. Small variations in the viscoelastic properties can result in significant differences in the longevity of the wheels and rollers that are subjected to a large number of cyclic compressive deformations. Therefore, it is of great interest to understand dynamic performance of urethane elastomers based on various backbones. Dynamic mechanical analysis (DMA) is commonly used to differentiate the dynamic performance of elastomers, but it only provides characterization of the dynamic behavior of a given elastomer at small deformation in the linear viscoelastic regime, where information such as the heat buildup and load-bearing capability of elastomers cannot be obtained. As such, we developed a stress-controlled flexometer on the basis of the ISO4666/4 method that enabled measurement of the heat buildup and load-bearing capabilities of urethane elastomers in a large dynamic deformation environment. Moreover, a dynamometer was constructed to evaluate wheels based on different urethane elastomers under load at various speeds; this allowed close simulation of the urethane elastomers in a real application environment. In this article, the viscoelastic properties of cast urethane elastomers based on different backbones were studied by DMA. The heat buildup and load-bearing capabilities of the elastomers were investigated via the stress-controlled flexometer, and the performance of the wheels based on various prepolymer systems were evaluated with the dynamometer. Correlations between the material viscoelastic behavior and the heat buildup were established. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Preparation and characterization of a biodegradable polyester elastomer with thermal processing abilities

We studied the condensing reaction of sebacic acid and glycerol and prepared biodegradable elastomers. Swelling experiments proved that the elastomers were crosslinked polyesters consisting of both insoluble parts (gel) and soluble parts (sol), but the content of sol was higher than gel. X‐ray diffraction analysis showed that some ordered and crystallized structures existed in most of the elastomers. Differential scanning calorimetry measurement showed that there were both crystal regions and amorphous regions with low glass‐transition temperatures in the products, which indicated the elastomers had a microphase separation structure. The elastomers exhibited thermal processing abilities, such as mold‐shaping performance, and a certain elasticity, and hydroxyl, carboxyl, and ester groups in the molecular chains endowed the elastomers with good biodegradation abilities. Furthermore, by altering the molar ratio of the reactants, we were able to adjust the mechanical properties, biodegradable performance, and so on of the elastomers. Glycerol and polymers containing sebacic acid have been approved for biological medical uses by the U.S. Food and Drug Administration, so the elastomers we prepared would have broad application in medical fields such as implants and drug‐delivery systems. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 2033–2041, 2005     

端羟基聚丁二烯/聚醚型聚氨酯弹体的合成及性能

研究端羟基聚丁二烯／聚醚型聚氨酯弹性体的配方。探讨游离—ＮＣＯ含量、以Ｎ，Ｎ－二（２－羟两基）苯胺（ＩｓｏｎｏｌＣ－１００）为扩链剂时，扩链系数以及端羟基聚丁二烯／聚四氢呋喃并用比等对弹性体力学性能的影响。试验结果表明，游离—ＮＣＯ含量为８．５％，扩链系数为０．８９时，弹性体的综合性能优良；端羟基聚了二烯／聚四氢呋喃并用比减小时，能改善弹性体的拉伸强度和撕裂强度。电子显微镜观察证明弹性体中呈现明显的软段相区和硬段相区。     

不同原料对合成PUR弹性体性能的影响

采用相同官能度、不同分子量的聚醚多元醇和甲苯二异氰酸酯(TD I)及扩链剂反应合成了系列聚氨酯(PUR)弹性体,同时对所合成的PUR弹性体进行了表征。结果表明,聚醚多元醇的相对分子质量对PUR弹性体的性能有较大影响,相对分子质量越大,柔性链段含量就越多,弹性体的拉伸强度、断裂强度和硬度就减小,断裂伸长率则相对提高。同时也进一步证明了软硬链段之间的均匀分布和较强的相互作用更有利于弹性体力学性能的提高。