水相法氯化橡胶的性能试验

通过选用3种黏度相近的氯化橡胶产品：CR-2水相法氯化橡胶、KL-10国产溶剂法氯化橡胶及GW—10进口溶剂法氯化橡胶，进行对比试验，检测了3种产品的常规性能，分析了红外光谱，并分别进行了配漆试验。结果表明：水相法氯化橡胶的质量指标达到了溶剂型氯化橡胶产品的质量指标，热稳定性优于国产溶剂型氯化橡胶产品，与进口产品性能相当；配制成涂料的各项性能符合船舶漆产品的技术要求，稳定性与溶剂型产品相当。     

氯化橡胶最新生产技术与市场分析（一）

本文综述了国内外氯化橡胶产品生产技术最新进展及氯化橡胶替代品发展概况,分析了中国氯化橡胶产品的市场现状与发展前景,并提出了一些具体建议。     

氯化橡胶生产技术进展

1前言1 氯化橡胶是由天然或合成橡胶经氯化改性后得到的橡胶状衍生产品.目前氯化橡胶产品有氯化乙丙、氯化聚氯丁二烯、氯化丁基橡胶、氯化聚丁二烯等.但多数情况下,氯化橡胶指氯化天然橡胶.本文论述的正是氯化天然橡胶.     

氯化橡胶涂料及其市场观察

<正>氯化橡胶是由天然橡胶或合成橡胶经氯化改性后得到的橡胶衍生产品,是橡胶领域中第1个工业化的橡胶衍生物。氯化橡胶主要用途是依相对分子质量大小或粘度高低划分不同型号,适用于油墨、涂料和粘合剂等,氯化橡胶涂料运用高分子合成技术,是新型特级橡胶防水涂料,加入了环氧树脂和树脂基团使本产品更具多功能与环保合一体,赋予新产品更具防水,防腐,防潮,防霉等功效。近年来,水相法氯化橡胶生产工艺发展较快,产品在防腐涂料上     

氯化天然橡胶生产技术与市场分析

综述了国内外氯化天然橡胶生产技术进展和氯化橡胶替代品发展概况。分析了中国氯化橡胶产品的发展前景,并提出了几点建议。     

高性能橡胶型氯化聚乙烯绿色制造技术通过专家验收

由潍坊亚星集团有限公司承担的“十一五”国家科技支撑计划项目——高性能橡胶型氯化聚乙烯绿色制造关键技术开发与应用项目近日通过了专家验收。该创新成果为我国氯化聚乙烯行业产品结构调整提供了技术支撑,并实现了氯化聚乙烯橡胶（CM）在高端产品应用的突破。     

高性能橡胶型氯化聚乙烯绿色制造技术通过专家验收

由潍坊亚星集团有限公司承担的“十一五”国家科技支撑计划项目——高性能橡胶型氯化聚乙烯绿色制造关键技术开发与应用项目通过了专家验收。该创新成果为我国氯化聚乙烯行业产品结构调整提供了技术支撑,并实现了氯化聚乙烯橡胶（CM）在高端产品应用的突破。     

我国氯化高聚物应用及市场分析

我国近年以来相继开发了氯化橡胶、氯化聚氯乙烯、氯化聚丙烯、氯化聚乙烯。氯磺化聚乙烯等品种，并已形成一定的生产规模，但在技术水平，产品性能指标等方面都存在着一定的差距，需努力改进。1国内现有几种氯化高聚物产品的现状1．l氯化橡胶我国从60年代起开始研制氯化橡胶，首先由上海电化厂实现工业化，以后广州化工厂、浙江建德农药厂等并相继建设生产装置。目前国内年产量约1500万吨，而市场需求量约为5000吨，基本上依赖进口解决，预计到ZqX）年国内需求量将达到1万吨／年左右，因此发展氯化橡胶对于满足国内市场很有必要。氯化橡胶…     

氯化橡胶的研制

一、前言氯化橡胶是以天然或合成橡胶为原料,四氯化碳为溶剂,采用催化氯化反应制得。由于氯化橡胶,具有优异的抗化学性、抗渗透性、阻燃性、成膜性。因而被广泛应用于涂料、油墨及粘合剂等行业。目前,国内氯化橡胶质量与国外同类产品相比,还有一定差距,为了提高产品质量,我所于1984年起,进行了氯化橡胶的实验室试验。现将结果归纳如下:     

化工简讯

J60—71膨胀型氯化橡胶防火涂料通过技术鉴定由广州制漆厂研制的J60—71膨胀型氯化橡胶防火涂料,日前通过由广东省公安消防总队组织的技术鉴定,并已投入生产,该产品的研制成功,填补了省内空白。该涂料是以氯化橡胶为基料,加入新型     

Improvement of properties of silica‐filled natural rubber compounds using polychloroprene

Because silica has strong filler–filler interactions, a silica‐filled rubber compound is characterized by a poor dispersion of the filler. Properties of silica‐filled natural rubber (NR) compounds were improved using polychloroprene (chloroprene rubber [CR]). The bound rubber content of the compound increases and the filler dispersion is also improved by adding CR to the compound. Physical properties such as modulus, tensile strength, abrasion, and crack resistance are improved by adding CR. Elongation at break of the vulcanizates containing CR is longer than that of the vulcanizate without CR, although crosslink density of the former is higher than that of the latter. The improved physical properties are attributed to the good dispersion of silica by adding CR. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2609–2616, 2002     

氯丁橡胶胶粘剂制备方法的探讨

氯丁橡胶胶粘剂的制备有3种方法,现常用混练法和直接溶胶法,通过对比和说明,建议各氯丁橡胶胶粘剂生产企业采用高剪切直接溶胶法。     

GABAergic and Glutamatergic Phenotypes of Neurons Expressing Calcium-Binding Proteins in the Preoptic Area of the Guinea Pig

The mammalian preoptic area (POA) has large populations of calbindin (CB), calretinin (CR) and parvalbumin (PV) neurons, but phenotypes of these cells are unknown. Therefore, the question is whether neurons expressing CB, CR, and/or PV are GABAergic or glutamatergic. Double-immunofluorescence staining followed by epifluorescence and confocal microscopy was used to determine the coexpression patterns of CB, CR and PV expressing neurons with vesicular GABA transporters (VGAT) as specific markers of GABAergic neurons and vesicular glutamate transporters (VGLUT 2) as specific markers of glutamatergic neurons. The guinea pig was adopted as, like humans, it has a reproductive cycle with a true luteal phase and a long gestation period. The results demonstrated that in the guinea pig POA of both sexes, ~80% of CB+ and ~90% of CR+ neurons coexpress VGAT; however, one-fifth of CB+ neurons and one-third of CR+ cells coexpress VGLUT. About two-thirds of PV+ neurons express VGAT, and similar proportion of them coexpress VGLUT. Thus, many CB+, CR+ and PV+ neurons may be exclusively GABAergic (VGAT-expressing cells) or glutamatergic (VGLUT-expressing cells); however, at least a small fraction of CR+ cells and at least one-third of PV+ cells are likely neurons with a dual GABA/glutamate phenotype that may coexpress both transporters.     

The use of pure methanol as fuel at high compression ratio in a single cylinder gasoline engine

The methanol has greater resistance to knock and it emits lower emissions than neat gasoline. As single cylinder small engines have low compression ratio (CR), and they run with slightly rich mixture, their power are low and emission values are high. The performance can be increased at high CR if these engines are run with fuels which have high octane number. In this study, methanol was used at high CR to increase performance and decrease emissions of a single-cylinder engine. Initially, the engine whose CR was 6/1 was tested with gasoline and methanol at full load and various speeds. Then, the CR was raised from 6/1 to 8/1and 10/1, gradually. The knock was not observed at the CRs of 8/1 and 10/1 when using methanol while the knock was observed at the CR of 8/1 when using gasoline. The knock was determined from the cylinder pressure-time curves. The results showed that some decreases were obtained in CO, CO₂ and NO_x emissions without any noticeable power loss when using methanol at the CR of 6/1. By increasing the CR from 6/1 to 10/1 with methanol, the engine power and brake thermal efficiency increased by up to 14% and 36%, respectively. Moreover, CO, CO₂ and NO_x emissions were reduced by about 37%, 30% and 22%, respectively.     

碱性钙基膨润土对亚甲基蓝和刚果红的吸附去除

该文研究了碱性钙基膨润土(ACB)对水体中的亚甲基蓝(MB)和刚果红(CR)染料的吸附性能,考察了吸附剂用量、吸附时间及温度、pH及盐等因素对吸附效果的影响,同时进行了两种染料在碱性钙基膨润土上的吸附等温模型、吸附动力学模型研究。结果表明,ACB对MB、CR的脱色率随着吸附剂用量的增加而增加,在实验条件下,50 mg/L MB和100 mg/L CR的最佳吸附剂质量浓度分别为1.0 g/L和2.0 g/L;升高温度可以加快吸附速率,但对最终的脱色率影响很小;50 mg/L MB的吸附平衡时间在60 min左右,100 mg/L CR的吸附平衡时间在120 min左右;在pH=3～12时,ACB对MB的脱色率都稳定在99%左右,而适宜ACB吸附CR的pH=3～7,对CR的脱色率保持在90%左右;NaCl的加入对MB的吸附效果影响很小,对CR的吸附则有很强的抑制作用;ACB对MB的吸附同时符合Langmuir和Freundlich模型,而ACB对CR的吸附则更符合Langmuir模型;ACB对两种染料的吸附过程均符合准二级动力学模型,颗粒内扩散模型的拟合结果说明吸附过程存在颗粒内扩散作用。     

氯丁橡胶胶粘剂制备方法的探讨

氯丁橡胶胶粘剂的制备有3种方法，现常用混炼法和直接溶胶法，通过对比和说明，建议各氯丁橡胶胶粘剂生产企业采用高剪切直接溶胶法。     

氯丁橡胶的改性研究进展

氯丁橡胶是最重要的合成橡胶之一。本文综述了氯丁橡胶的填充改性、共混改性、接枝改性及化学改性,介绍了氯丁橡胶改性领域的技术进展和改性氯丁橡胶的主要特性及用途。相比于填充改性、共混改性和接枝改性,氯丁橡胶的化学改性研究相对较少,目前主要集中在氢化改性。相对于氢化,卤化改性不但能够饱和氯丁橡胶中的残余双键,而且可以提高橡胶的硫化活性,改善硫化困难的缺点,因此,优化氯丁胶的氢化改性工艺、探索氯丁橡胶的卤化改性、使其具有更好的综合性能将是今后氯丁橡胶改性的发展方向。     

应加快水相法氯化橡胶的技术开发

介绍了氯化橡胶有特性、用途和生产技术进展，并提出了加快水相法氯化橡胶技术开发的建议。     

Corrosion Resistance of Fused Cr_2O_3-Al_2O_3 Grains with Different Compositions

Six kinds of Cr2O3 Al2O3 fused grains ( the mass percent of Cr2O3 was 15% ,40% ,50% ,60% ,85% and 99% ,respectively) were prepared using chrome green and Al2O3 powder as starting materials by electrofusion,named as CR15,CR40,CR50,CR60,CR85, and CR99,respectively. The corrosion resistance of the six kinds of Cr2O3 Al2O3 fused grains ( 4 1 mm) was studied using rotary slag corrosion method. The results show that: ( 1) the corrosion resistance of the fused grains increases with the Cr2O3 content and the grain size increasing; ( 2) the grains of CR99 and CR85 with higher Cr2O3 content are corroded at the slag surface layer,because FeO and Al2O3 in the slag corrode the grains; FeO reacts with Cr2O3 in the aggregates forming ( Fe,Cr) 3O4 spinel firstly,and the spinel reacts with other phases forming composite spinel; when FeO is fully consumed,Al2O3 penetrated into the grains reacts with Cr2O3 forming Al2O3 Cr2O3 solid solution on the grains surface; ( 3) for CR60,the corrosion exists both in the slag surface layer and in the penetration layer; in the penetration layer,CaO and SiO2 react with Al2O3 in Al2O3 Cr2O3 solid solution forming anorthite, gehlenite, and glass phase; the grains of CR50,CR40 and CR15 have the same corrosion mechanism with CR60 in the penetration layer.     

Improvement of the mechanical and thermal properties of silica‐filled polychloroprene vulcanizates prepared from latex system

In this work, well‐dispersed silica suspension having excellent storage stability was prepared by using an ultrasonic probe. The obtained silica suspension and curatives were added into the polychloroprene (CR) latex for preparing silica‐filled CR latex compounds having various silica loadings. Then, the silica‐filled CR vulcanizates were prepared via a dipping process. The thermal and mechanical properties of the dipped CR vulcanizates containing silica dispersed by using an ultrasonic probe were compared with those of the dipped CR vulcanizates containing silica dispersed by using a mechanical stirrer. By using thermogravimetric analysis, it could be seen that thermal resistance of the dipped CR films having silica prepared by ultrasonic probe is greater than that prepared by using the mechanical stirrer. This result corresponds well with their tensile strength after aging in the hot‐air oven. In addition, modulus, tensile strength, and tear strength of the vulcanizates prepared from CR latex compounds containing silica prepared by using the ultrasonic probe are obviously greater than those prepared by using the mechanical stirrer, especially at high silica loading. This is because the silica prepared using the ultrasonic probe is uniformly distributed and dispersed throughout the CR matrix, as can be observed in the scanning electron microscope micrographs. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012