聚氯乙烯糊树脂对旋转模塑用增塑糊性能的影响

较为深入地研究了ＰＶＣ糊树脂种类对旋转模塑用ＰＶＣ增塑糊性能的影响,从而为旋转模塑用ＰＶＣ增塑糊中糊树脂种类的确定提供了有益的参考。     

PVC糊树脂对旋转模塑用PVC增塑糊性能的影响

通过ＰＶＣ糊树脂种类对旋转模塑用ＰＶＣ增塑类性能的影响进行较为深入的研究,从而为旋转模塑用ＰＶＣ增塑糊中糊树脂种类的确定提供了有益的参考。     

表面活性剂对旋转模塑用PVC增塑糊性能的影响

通过表面活性剂种类及用量对旋转模塑用ＰＶＣ增塑糊性能影响的研究,为旋转模塑用ＰＶＣ增塑糊中表面活性剂种类及用量的确定提供了有益的参考。     

表面活性剂对旋转模塑用PVC增塑糊性能的影响

研究了表面活性剂种类及用量对旋转模塑用ＰＶＣ增塑糊性能的影响,为旋转模塑用ＰＶＣ增塑糊中表面活性剂种类及用量的确定提供了有益的参考。     

表面活性剂对旋转模塑用PVC增塑糊性能的影响

通过表面活性剂种类及用量对旋转模塑用ＰＶＣ增塑糊性能的影响进行较为深入的研究，从而为旋转模塑用ＰＶＣ增塑糊中表面活性剂种类及用量的确定提供了有益的参考     

旋转模塑用聚氯乙烯增塑糊凝胶化性能研究

聚氯乙烯增塑糊的凝胶化是指ＰＶＣ增塑糊在加热过程中，增塑剂扩散到糊树脂颗粒内部，使ＰＶＣ增塑糊粘度升高，汗至失去流动性的过程，是重要的工艺特性。本文利用ＮＤＪ－１型旋转粘度计对旋转模塑用ＰＶＣ增塑糊的凝胶化进行了较为深入的研究。     

聚氯乙烯糊用掺混树脂对增塑糊及制品性能的影响

本文通过实验研究了掺混树脂对ＰＶＣ增塑糊的流变性能，凝胶化性能，糊粘度陈化稳定性及对增塑糊制品的力学性能、热性能、物理性能和发泡性能的影响，并分析了其影响作用的机理。     

旋转模塑用聚氯乙烯增塑糊脱气性研究

ＰＶＣ增塑糊的脱气性能是重要的工艺参数，当增塑糊中包裹中有气体时，一制品表面易出现气泡或针眼，必须经抽真空脱气处理。本文利用自制真空脱气装置，对ＰＶＣ增塑糊的脱敢怀进行了较为深入的研究。     

轿车扶手表皮材料——旋转模塑用聚氯乙烯增塑糊粘度稳定性研究

ＰＶＣ增塑糊粘度稳定性是指粘度随时间的变化，是影响糊制品加工工艺的重要因素，本文利用ＮＤＪ－１型旋转粘度计，通过测定糊粘度随时间的变化，对影响ＰＶＣ增塑糊粘度稳定性的各种因素进行了较为详细的研究。     

旋转模塑用聚氯乙烯增塑糊粘度稳定性研究

ＰＶＣ增塑糊粘度稳定性是影响糊制品加工工艺的重要因素，本文利用ＮＤＪ－１型旋转粘度计，通过测定糊粘度随时间的变化，对影响ＰＶＣ增塑强粘度稳定性的各种因素进行了较为详细的研究。     

增塑剂对旋转模塑用PVC增塑糊性能的影响

通过增塑剂种类及用量对旋转模塑用聚氯乙烯(PVC)增塑糊粘度及其粘度稳定性、脱气性能、凝胶化性能的影响及温度对凝胶化性能的影响进行了研究。结果表明:选择自身粘度较小且溶剂化能力较弱的增塑剂及随增塑剂用量增加,PVC增塑糊粘度下降、粘度稳定性逐渐变好,有利于PVC增塑糊的排气性能提高,延长PVC增塑糊的凝胶化时间。通过调节加热温度及时间可在一定范围内有效控制凝胶化过程,以期获得制品所需性能。     

纳米CaCO3/PVC增塑糊体系触变性能研究

研究了纳米CaCO3/PVC增塑糊体系的触变性能,并在分析纳米CaCO3/PVC增塑糊体系中作用力、增塑糊中物CaCO3粒子分布状态的基础上建立了纳米CaCO3/PVC增塑糊体系的微观结构模型,依据该模型提出了纳米物CaCO3/PVC增塑糊体系的触变性行为机理。结果表明,从触变性能出发,纳米CaCO3的填充量存在一个最佳范围;随着剪切力的增大,CaCO3粒子间拟网络结构的平衡状态逐渐被破坏,体系的微观结构形态发生变化,粒子间的距离被拉开,颗粒间的作用力由排斥转变为吸引。在外部剪切力消除后,布朗运动和团聚体颗粒间的吸引力使得体系又恢复到静止状态的拟网络结构,但恢复过程需要一定时间,从而使体系体现出触变性行为。     

Influences of contents and molecular weights of LDPE on DOP plasticization of PVC

Influences of contents and molecular weights of low‐density polyethylene (LDPE) on dioctyl phthalate (DOP) plasticization in the poly(vinyl chloride) (PVC) plastisol (PVC/DOP/AO = 100/30/6.5) were investigated using DMA and DSC. The plasticization effects of DOP on the PVC plastisol were found to decrease with increasing LDPE content. A negligible plasticization effect of DOP on the PVC plastisol was found when the LDPE content was equal to or higher than 75 parts per 100 parts by weight of LDPE and PVC together. Based on thermal fractionation experiments, a favorable interaction between LDPE and DOP was developed during melt blending of LDPE and the PVC plastisol. The present interaction enabled the incorporation of DOP into LDPE and decreased the plasticization effects of DOP on the PVC plastisol. A further decrease in the plasticization effects of DOP on the PVC plastisol by the presence of LDPE was found with increasing LDPE molecular weights. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2548–2555, 2002     

Air release in PVC plastisols

The ability of a PVC plastisol to liberate entrapped air during mixing and processing is an important factor to the processors. This property, known as air release, is affected by several variables such as resin, plastisol viscosity, surface tension, surfactant system and plasticizer type. A study was conducted to obtain a more fundamental understanding of the effects of these variables on air release. Complicating the accurate study of a plastisol's air release properties is the fact that current test procedures such as the vacuum rise, syringe test and Huff or ring test each have limitations imposed by either plastisol properties or by testing technique. Any one of these procedures alone may not adequately measure air release. This paper, in addition to studying the factors affecting air release, discusses these testing limitations and makes recommendations as to the best methods for evaluating air release properties in the laboratory.     

浅谈PVC溶胶与合成纤维的粘接

介绍了一种用于PVC溶胶的直接粘接剂－Vulcabond，其可以改进PVC塑料溶胶与聚酯、尼龙和其它合成纤维产品的粘接性，并详细介绍了它的使用方法和影响粘接的各种因素。     

汽车用PVC塑溶胶及PVC塑溶胶用增黏剂发展趋势

介绍了国内汽车用PVC塑溶胶及PVC塑溶胶用增黏剂的现状、组成及主要技术指标,并阐述了其发展趋势,如开发低温固化型PVC塑溶胶、低密度型PVC塑溶胶、湿碰湿型PVC塑溶胶、低温解封型聚氨酯增黏剂等。     

More meaningful measurement of plastisol properties

The fundamentals of plastisol rheology must be understood in order to properly select and utilize plastisol property measurements. Useful evaluation should also be made of the rheological effects of formulation ingredients and their interrelationships. Other factors such as plastisol preparation, storage conditions, process shear rates, temperatures, dwell times, and finished product specifications will influence the design of effective test procedures. Once meaningful plastisol property measurements have been developed, better quality control assurance results, and in addition quality, productivity, and profitability improvements are effected.     

Optimization of plastisol processes by dynamic mechanical analysis

Dynamic mechanical analysis (DMA) can be a particularly useful tool for studying PVC plastisol manufacturing processes. DMA temperature sweeps are uniquely able to characterize plastisol gelation and fusion behavior under low shear stress conditions that are similar to conditions found in many commercial plastisol processing operations. Dynamic mechanical analysis is also well‐suited for studying plastisol melt viscosities at low shear rates such as might be encountered in a flexible PVC foaming process or rotomolding process. Likewise, DMA rate sweeps or strain sweeps can give insights into self‐association and flow properties in a plastisol which ordinary viscometers cannot provide. J. VINYL ADDIT. TECHNOL., 13:151–154, 2007. © 2007 Society of Plastics Engineers     

提高PVC塑溶胶粘合力研究

ＰＶＣ塑溶胶配制的密封胶具有单组分、无溶剂、贮存稳定及弹性好、耐化学介质优良等特点、缺点是粘合力差。本文介绍了环氧树脂、聚氨酯树脂、聚酰胺树脂、丙烯酸树脂、尿素树脂等对ＰＶＣ塑溶胶的增粘作用,论述探讨了增粘剂的结构特点和增粘机理,以及油面胶的配制。