复合V带成型硫化工艺与硫化模设计的改进

对复合V带成型硫化工艺和硫化模设计进行了改进.采用模芯环形加热腔,对复合V带整体硫化后制品的脱模和提高硫化温度均匀性及硫化效率进行了探讨.     

一种橡胶V带圆模硫化装置

授权公告号:CN 107521011B授权公告日:2018年10月16日专利权人:浙江三维橡胶制品股份有限公司发明人:何良、叶军、李晓林本发明公开了一种橡胶V带圆模硫化装置的设计方法。该硫化装置包括硫化罐(腔体底部设有支撑平板)、V带硫化模套(下端面支撑于支撑平板上表面,外侧设有若干自下而上分布的环形V带成型槽)、模具密封盖板(支撑于V带硫化模套的上端     

普通V带的硫化罐圆模胶套加压硫化

对普通V带试行硫让罐圆模胶套加压硫化,在设备定制、胶套制备、模具设计、产品硫化等方面进行了探索。实践表明,用胶套加压硫化的V带外观及刚性优于水包布加压硫化的V带和鄂式平板硫化的V带。     

普通V带的硫化罐圆模胶套加压硫化

用硫化罐圆模胶套加压硫化普通V带,使V带受热均匀无重复硫化段,加压压力大,V带质量好。本文对普通V带试行硫化罐圆模胶套加压硫化,在设备定制、模具设     

多楔带成型硫化工艺及其成型硫化模设计

对多楔传动带成型硫化工艺和成型硫化模设计之要点进行了阐述，并着重对多楔带整体硫化的楔模出模和硫化温度均匀性的实施措施进行了技术实践总结。     

V带硫化胶套的生产

本文叙述了V带硫化胶套在试制过程中的配方选择以及胶套的生产工艺。一、概述我国V带的硫化目前大部分厂家采用平板硫化,小规格V带采用园模硫化,鼓式硫化等。使用胶套硫化的厂家较少。但国外小规格V带,特别是汽车V带大部分都采用胶套硫化。     

包布式橡胶V带鼓式硫化机硫化新工艺的探究

橡胶V带结构形式分为两大类:切边式橡胶V带和包布式橡胶V带。切边式橡胶V带硫化工艺一般采用的是硫化罐圆模硫化。包布式橡胶V带采用     

V带硫化胶套的研制

一、概述我国V带的硫化目前大部分采用平板硫化。小规格V带采用园模硫化、鼓式硫化等,使用胶套硫化的厂家相对较少。但国外     

一种橡胶V带圆模硫化装置

正授权公告号:CN 107521011B授权公告日:2018年10月16日专利权人:浙江三维橡胶制品股份有限公司发明人:何良、叶军、李晓林本发明公开了一种橡胶V带圆模硫化装置,旨在不影响橡胶V带硫化效果的前提下,有效减少通入硫化罐内的蒸汽,从而减小硫化完成后的蒸汽量排放量,降低能源消耗。硫化装置包括硫化罐(腔体底部设有支撑平板)、V带硫化模套(下端面支撑     

V带硫化胶套的研制

一般V带硫化采用平板硫化或园模硫化等，而胶套硫化为采用硫化罐硫化，使用时先把胶套固定在一个专用支架上，然后吊入硫化罐中固定，硫化时把成型好的带坯吊入胶套内，关闭硫化罐，充入蒸汽，到达硫化时间，开罐吊出带坯即可，其化原理为，通过蒸汽内压加热模具硫化，利用蒸汽内外压差对V带压，通过一定时间完整个硫化过程。     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况，合成乙苯，苯乙烯所用的催化剂种类，并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。     

Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile

Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, ¹³C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc.     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu₃Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu₃Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters.     

钾盐资源及钾肥供需情况分析及预测

阐述了国内外钾盐资源及钾肥生产现状,对国内外钾盐的供需形势进行了分析及预测,从资源、原材料、国际市场三方面提出了解决我国钾盐短缺的措施。     

Kinetics and Mechanism of Oxidation of Mono- and Polyacetals

Abstract

Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed.     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength.     

责任和责任心的涵义与结构

责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体.     

二甲基二烯丙基氯化铵和丙烯酰胺的合成及应用

用复合引发体系(过硫酸盐-偶氮类引发剂)和脂肪胺类氧化还原体系引发,在实验室获得了单体转化率≥98%,特性粘数高于13.6 dL/g的阳离子共聚物PDA,探讨了控制聚合物分子量的影响因素.     

Wetting properties of homopolymers and copolymers of pentafluorostyrene and methylacrylate and homopolymer blends

Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method¹ was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity.