环保塑解剂RP-66在斜交轮胎胶料中的应用

研究环保塑解剂RP-66等量替代五氯硫酚在斜交轮胎胶料中的应用。结果表明:与五氯硫酚相比,加入塑解剂RP-66的胶料塑化效果较好,混炼能耗明显降低,加工性能改善;硫化胶的物理性能和抗湿滑性能较好,滚动阻力较低,老化后的H抽出力提高,其他性能变化不大。     

环保塑解剂RENACIT-10在全钢载重汽车子午线轮胎胎面胶中的应用

试验研究环保塑解剂RENACIT-10替代五氯硫酚类塑解剂SJ—103在全钢载重汽车子午线轮胎胎面胶中的应用。结果表明，采用环保塑解剂RENACIT-10替代五氯硫酚类塑解剂SJ-103，对胶料的门尼焦烧时间、正硫化时间以及硫化胶的定伸应力、拉断伸长率和耐磨性能有所影响，对混炼胶的门尼粘度影响尤为显著。随着环保塑解剂RENACIT-10用量增大，混炼胶的门尼粘度和硫化胶的定伸应力呈减小趋势，正硫化时间呈缩短趋势，硫化胶的耐磨性能变差，老化后撕裂强度显著提高。以环保塑解剂RENACIT-10减量25％替代五氯硫酚类塑解剂SJ-103的效果最佳。     

环保型化学塑解剂SL-6010在全钢载重子午线轮胎胎面胶中的应用

研究环保型化学塑解剂SL-6010(2,2′-二苯甲酰胺基二苯基二硫化物)在全钢载重子午线轮胎胎面胶中的应用。结果表明:与传统塑解剂五氯硫酚相比,环保型化学塑解剂SL-6010对胶料的塑解效果相当,对胶料物理性能和成品轮胎耐久性能无不良影响。环保型化学塑解剂SL-6010可替代传统的硫酚类塑解剂用于全钢载重子午线轮胎胎面胶中。     

橡胶塑解剂B在武汉瑞兴化工有限公司投产

橡胶塑解剂Ｂ在武汉瑞兴化工有限公司投产橡胶塑解剂Ｂ是以五氯硫酚为主体，添加活性剂和分散剂等复配而成的硫酚类橡胶塑解剂。该产品适用于天然胶的塑炼，也可用于合成胶（丁苯胶、丁腈胶等）的塑炼。该产品技术指标达到国外同类产品的水平。自１９９５年试产并供厂家使...     

环保型塑解剂——Renacit 11

正环保塑解剂Renacit 11,化学名称2,2-二苯基甲酰胺二苯基二硫化物,作为有机二硫化物,该产品无毒、无污染、塑解效果好,对橡胶制品老化性能无影响,亦无喷霜现象,特别适用于高温密炼加工,是目前替代有毒塑解剂五氯硫酚的主要产品之一,武汉径河化工有限公司和大连天宝化学工业有限公司都已工业化生产。塑解剂Renacit 11的合成方法主要有3种。     

丙酮溶剂法合成五氯硫酚

<正> 一、前言五氯硫酚(简称PCTP,本所编号为橡胶塑解剂12—Ⅱ,相当于西德牌号Renacit—Ⅴ),为天然胶、丁苯胶及丁腈胶的塑解剂。在天然胶中使用可提高塑炼效率,降低电力消耗,有利于提高经济效益。对硫化胶的物理机械性能无不良影响。五氯硫酚既是橡胶塑解剂的一个独立品种,又是某些橡胶助剂不可缺少的原料或组     

新型环保塑解剂Renacit11的应用

塑解剂Renacit11（2,2-二苯基甲酰胺基一二苯基二硫化物）是一种高效环保型塑解剂,可以等量取代五氯硫酚塑解剂用于胶料塑炼或混炼,安全、高效,对橡胶制品性能无不良影响,对环境也没有危害。     

新型环保塑解剂Renacit 11的应用

塑解剂Renacit 11(2,2′-二苯基甲酰胺基-二苯基二硫化物)是一种高效环保型塑解剂,可以等量取代五氯硫酚塑解剂用于胶料塑炼或混炼,安全、高效,对橡胶制品性能无不良影响,对环境也没有危害。     

塑解剂及其应用

现代橡胶加工工业正向着大型化、高速化、安全及高效率化的方向发展，在其现代化的发展过程中，新型塑解剂的应用是不可低估的。塑解剂主要用于天然橡胶的加工。市售塑解剂可分为４大类：①芳香族硫酚；②芳香族二硫化物；③芳香族硫酚金属盐；④复合型塑解剂。其中复合型塑解剂是发展方向。当前橡胶工业使用最广泛的塑解剂是五氯硫酚锌与分散剂、活化剂构成的复合组分，如拜耳公司的Ｒｅｎａｃｉ７、Ｅｎｉｃｈｅｍ公司的Ｃｉｃｌｚ－ｚａｔｅ３Ｃ／Ａ及国内武汉泾河化工厂的ＳＪ－１０３。国内目前采用的塑解剂还有Ｓ·Ｓ公司的Ａ５０ｐ和…     

氯醚橡胶加工技术(2)

第2章加工技术2．1塑炼氯醚橡胶的塑炼加工性能与天然橡胶相同，低温塑炼能使其分子链显著降低，对于添加填充剂的氯醚橡胶配合物也有这种倾向。均聚氯醚橡胶的塑炼效果如图2—1所示。共聚氯醚橡胶及其添加填充剂胶料的塑炼效果与均聚氯醚橡胶相同。此外，氯醚橡胶硫化胶的物性基本不受塑炼的影响。希望通过塑炼极大降低分子量时，最好是在塑炼中加入塑解剂。对于氯醚橡胶塑炼，市售的硫醇类塑解剂也有一点作用，但是过氧化物塑解剂的效果最好。用过氧化物塑解剂塑炼时，塑炼温度必须接近于过氧化物塑解剂的分解温度。图2—2为均聚氧醚橡胶…     

橡胶塑解剂五氯硫酚中硫含量的测定

对五氯硫酚进行硝解处理，用硫酸钡重量法测定五氯硫酚中硫的含量，此法的相对偏差低于0．13％，标样的回收率为99．8％～100．2％。     

环境友好型高芳烃橡胶填充油的现状和探索

介绍了环境友好型橡胶填充油的研究背景、判定标准和检测方法,分析了以中国石化高桥石化公司2种糠醛精制抽出油为原料调合得到的橡胶填充油的质量指标,认为其符合普通高芳烃橡胶填充油的产品质量要求,但其多环芳烃含量高,还达不到环境友好型橡胶填充油的质量要求,并对生产环境友好型橡胶填充油的工艺方法提出了建议。     

Improved processability of PA66-polyimide copolymers with different polyimide contents

Limitations in the properties of polyamide PA66, such as low glass transition temperature and high water absorptivity, limit its applications. Introduction of amorphous polyimide segments into the PA66 main chain lowers the glass transition temperature and melting temperature and also improves its processability. PA66-polyimide (PA-PI) copolymers with different weight ratios of PI are prepared by high temperature and high-pressure solution polymerization. The degree of crystallization of PA-PI copolymers decreases with increasing PI content. The melting point decreases from 261°C for PA66 to 223°C for PA-PI-4. Dynamic mechanical analysis shows that the T_g increases from 70 to 90°C, and the storage modulus can be well maintained. Rheological studies show that the temperature for processing can reach 70°C. Copolymers with different PI contents show different processing viscosities. In addition, water absorptivity (about 1.8%) and dielectric constant values of PA-PI and PA6/6T are similar.     

New Semi-Interpenetrating Polymeric Networks from Linear Polysulfone and Thermosetting Bismaleimide and Polyaminobismaleimide Resins

New semi-interpenetrating (semi-IPN) polymeric networks from commercial polysulfone (UDEL RP-1700) and thermosetting bismaleimide (4, 4'-bismaleimidodiphenylmethane) (BMDM) and maleimide terminated polyaminobismaleimide prepolymer based upon BMDM and 4, 4'-diaminodiphenylmethane were prepared. The chemistry, processing, physical and mechanical properties, phase morphology, thermal stability and solvent resistance of the neat resins are presented. The interrelationships among structure, processing, propcrties, and morphology are also discussed.     

环保型软磁塑料片的生产研究

介绍了新型环保型软磁塑料片的生产研究,寻找与环保产品匹配的原材料及助剂,确定最佳批量生产配方及生产流程.该工艺可操作性强,产品外观好,易于加工,没有掉磁粉、气味大等问题.用户反映该新型环保软磁塑料片性能稳定,在抽样进行RoHS鉴定过程中全部达标,满足市场要求.     

Comparative Evaluation of Vegetable Oils-Impregnated Layers as Reversed-Phases for Thin-layer Chromatography

Silica gel plates impregnated with a variety of oils including vegetable oils (olive, sunflower and corn oil) and synthetic oils (trioctylamine and paraffin oil) were evaluated and compared with the commercially available reversed-phases TLC plates (RP-18, RP-18W, and CN). A series of selected lipophilic vitamins was employed to evaluate the suitability of oils as reversed-phases for TLC and to provide different lipophilicity indices: R _M0, scores corresponding to the first principal component of R _F and/or R _M, the arithmetic mean of R _F and R _M values obtained with solvent mixture containing various concentrations of methanol in water. The retention results were excellent (r > 0.98) and allowed accurate estimation of lipophilicity of selected vitamins and to ranking the lipophilicity of oils when comparing with chemically bonded phases. Concerning the lipophilicity scale of vegetable oils, it is worth noting that corn oil presents the highest lipophilicity, closely followed by the olive and sunflower oils.     

橡胶塑解剂五氯硫酚中硫含量的测定

对五氯硫酚进行硝解处理,用硫酸钡重量法测定五氯硫酚中硫的含量,此法的相对偏差低于0.13%,标样的回收率为99.8%~100.2%。     

Annealing effect on crystalline structure and mechanical properties in long glass fiber reinforced polyamide 66

Generally, annealing is one of the important post‐processing methods used to obtain injection molding products coupled with excellent comprehensive performance. Based on a series of experimental studies in this work, a systematic investigation was performed to research the annealing effect on crystalline structure and mechanical properties in long glass fiber reinforced polyamide 66 (LGF‐PA66) composite. The composite was prepared by injection molding, using LGF‐PA66 pellet with 50 wt % fiber content and 12 mm length. Composite samples were annealed in 120 °C to 200 °C range and then subjected to various tests at room temperature. Besides, the releasing strain during a specific temperature cycle was also investigated. Our results suggest that annealing treatment had a neglected impact on the crystallinity and crystal morphology of LGF‐PA66 composite. However, with the increasing of processing temperature, annealing could strikingly promote the phase transition from γ to α and the further growth of α₂ crystal in (010)/(110). In addition, annealing of LGF‐PA66 composite resulted in a drastic increase in tensile and flexural properties and a reduction in impact strength, along with the transition of failure mode. The changes in mechanical properties were attributed to the crystal transition, strengthening of matrix performance, and the release of residual stress. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44832.     

Lipophilicity of Flavonoids Estimated by Reversed-Phase High Performance Thin-Layer Chromatography: Chemically Bonded Plates vs. Impregnated Plates with Oils,Animal, and Human Fats

Silica gel plates impregnated with a variety of oils (olive oil, sunflower oil, corn oil, trioctylamine, and paraffin oil) and fats (margarine, butter, cod liver fat, pig fat, sheep fat, pullet fat, and human fat) were evaluated and compared with the commercially available reversed-phases TLC plates (RP-18, RP-18 W, and CN). A representative series of flavonoids is employed to evaluate the suitability of oils and fats as reversed-phases for TLC and to provide different lipophilicity indices: R_M0, scores corresponding to first principal component of R_F and/or R_M, arithmetic mean of R_F and R_M values obtained with solvent mixture containing various concentrations of methanol in water. The retention results were excellent (r > 0.96) and allowed for accurate estimation of lipophilicity of selected flavonoids and to ranking the lipophilicity of oils and fats when comparing with chemically bonded phases. The human fat-impregnated plates provided lipophilicity values closely associated with those obtained for margarine and butter. Moreover, the human fat lipophilic character seems to be placed between pullet and cod fats. Concerning the lipophilicity scale of vegetable oils, it is worth noting that the corn oil presents the highest lipophilicity, closely followed by the sunflower and olive oils.     

A comparative study of polyurethane foam by substituting LBA using green polyurethane foam CFA-1

Polyurethane foams are well-known optimal thermal-insulating materials, which have good thermal insulation performance, high strength, and lightweight properties. Here, we describe a chlorine-free and fluorine-free polyurethane chemical foaming agent (CFA-1) that can react with isocyanate to release CO₂ gas and foam polyurethane. We systematically studied its application performance in the field of polyurethane spraying by substituting the current most advanced and environment-friendly physical foaming agent 1-chloro-3,3,3-trifluoroprop-1-ene in different proportions. The results show that highly competitive mechanical properties lead to economical, environment-friendly, and efficient features. The lower thermal conductivity, more compact and smaller bubble structure, and excellent compression strength were achieved by tuning the proportion of CFA-1 from 20% to 60%. Thus, a promising material system was established for the development of the rigid polyurethane foam industry.