回归分析法在橡胶配方试验中的应用

橡胶配方试验中涉及到大量数据,优选试验数据能够对各项材料之间的关系进行描述,并得到最优的橡胶制作配方。基于此,就回归分析法在橡胶配方试验中的应用进行研究,首先就橡胶配方试验及试验数据进行简要概述,然后从回归模型及应用分析、显著性检验、回归模型及方程选择、回归分析法验证等方面阐述回归分析法在橡胶配方试验中的具体应用。     

CAR系统的回归分析法应用及其他

作者和他的合作者开发的计算机辅助试验研究系统（简称CAN系统）是一个试验设计的专门应用软件，由正交试验法和回归分析法两大部分组成，以一个三变量多性能指标的丁精橡胶配方设计（三元二次回归模型）为例，说明了CAR系统回归分析法部分的回归试验设计、回归方程的获取与显著性检验、预测和优选配方等试验设计功能和其他情况，并且结合这个实例讨论了应用回归分析法有时被忽视的几个基本问题：回归方程的显著性检验，重复试验和拟合检验，回归系数的显著性检验，对食不显著项回归方程的处理，剩余标准高差，回归正交设计和自变量编码等。     

均匀设计法在EPDM配方试验中的应用

介绍了均匀设计法在EPDM配方试验中的应用,均匀设计法的橡胶配方试验过程是：方案设计→试验测试→试验数据回归分析→预测和优选配方→验证试验。对EPDM胶料撕裂强度,扯断伸长率和拉伸强度的试验和三元二次回归方程分析表明,均匀设计法可大大减少橡胶配方试验次数且试验效果好;EPDM胶料最优配方的硫黄,白炭黑和芳烃油用量分别为0．3,26和10份。     

计算机辅助试验研究系统及试验设计

计算机辅助试验研究（ＣｏｍｐｕｔｅｒＡｉｄｅｄＲｅｓｅａｒｃｈ，简称ＣＡＲ）系统是大型试验设计和分析应用软件包，由正交试验法和回归分析法两大部分组成，具有功能比较完善、数据处理灵活和使用方便等特点。正交试验法部分有试验安排、直观分析和（或）方差分析功能。回归分析法部分包括线性回归分析、二次回归分析和逐步回归分析，有回归试验安排、回归方程的获取及显著性检验、性能预测、绘制性能曲线或等高线图和优选配方等功能。ＣＡＲ系统完全适合辅助橡胶、塑料和胶粘剂等的配方设计和试验。     

虚拟目标法在多指标橡胶配方试验中的应用

介绍在多响应问题中用于多目标同步优化的一种方法即虚拟目标法,并以SBR多指标配方试验为例,依据通过均匀设计法和回归分析法建立的回归方程,应用虚拟目标和网络法预测和优选出各项性能达到标的值的配方和综合性能最优的配方。     

防老剂并用量的计算机优化试验设计

在统计试验设计基础上,通过计算机辅助建模与优化技术,得到了防老剂用量对胶料性能影响的回归方程,并获得了最优配方。试验结果表明,数据处理组合（ＧＭＤＨ）是适于橡胶均匀试验设计的一种非线性建模方法,所获得的回归方程精度高,可用于配方的性能预测与优选     

NdBR用于SBR/NR/BR体系子午胎胎冠胶的配方研究

采用均匀设计法设计了将NdBR用于SBR/NR/BR及白炭黑炭黑并用体系的子午线轮胎胎冠配方,用SAS统计回归分析软件对硫化胶主要物理机械性能进行逐步回归,得到性能与主要影响因素的回归方程,并对其进行验证,同时用其指导配方改进。结果表明,采用均匀试验和SAS回归分析得到的回归方程可以较好的预测该配方体系硫化胶的性能,指导配方改进。     

蒸馏白泥生产橡胶填料

本文简述了以蒸馏废泥生产橡胶填料的试验,进行了填料的制备、改性、制品的配方设计及性能测试等方面的研究工作。结果表明:以制碱工艺过程中蒸馏废渣生产的白泥填料在性能上优于目前使用的轻质碳酸钙填料,可用于橡胶制品作为填料。     

现代橡胶配方优化设计的CAD技术

所谓橡胶配方设计,是根据产品的性能要求和工艺条件,通过试验、优化、鉴定、合理地选用原材料,确定各种原材料的用量配比关系。借助CAD技术,可以根据橡胶制品设计需求自动安排试验方案、处理数据、预测和优选配方,缩短新产品开发周期,更好地满足不断变化的市场需求。1现代橡胶配方优化设计概念生胶原材料和配合剂的种类繁多,若按其功能、品种、等级、牌号等分类则可达数万种以上。橡胶配方设计的重点是如何保持制品的使用性能及加工性能的平衡,包括试验设计、数学建模、配方优化及质量成本控制等内容。1.1试验设计是基础试验设计是在试验…     

EPDM耐热橡胶制品配方的研究与设计

本文研究了采用硫黄给予体体系硫化的EPDM耐热橡胶，并应用正交试验设计法优选出物理机械性能较好的EPDM配方，用以制造耐热、耐过热水蒸汽的橡胶制品。     

Reducing of heat loss of rubber compound using natural zeolite filler: effect of partially substitution of fillers on compound properties

The main objective of this work was reducing the heat loss of styrene butadiene rubber by partial substitution of carbon black with natural zeolite as a filler. Reducing the usage of carbon black in the rubber industry is a good strategy to decrease fossil fuel usage and global warming. There are different mineral fillers like silica and clay to be used instead of carbon black. Effect of application of natural zeolite on reducing the heat loss of rubber compound based on SBR was investigated by melt mixing of natural zeolite in rubber matrix in an internal mixer. Natural zeolite was selected as 5, 10, 15, and 20 phr. Carbon black was partially substituted with zeolite and the effect of natural zeolite content and structure on different aspects of the compound including heat buildup, hardness, elongation, and modulus were evaluated. It was shown that although cross-link density and mechanical properties of the compounds decreased a little, but a significant improvement was observed in the fatigue resistance of the compounds beside a favorable decrease in the heat buildup and abrasion loss with an increase in the natural zeolite loading. The rate of improvement in properties was slowed down at zeolite contents higher than 5 phr.     

Comparative Study of the Cure Characteristics and Mechanical Properties of Natural Rubber Filled With Different Calcium Carbonate Resources

Bio‐waste materials such as eggshell (ES) and fishbone (FB) were used as new fillers compared with commercial calcium carbonate (CC) in natural rubber composite. The effect of their presence in the rubber mix on the rheometric study, morphology, mechanical properties, hardness, and abrasion resistance has been investigated at constant filler content (30 phr). The filler and their composites were characterized by Fourier‐transform infrared, X‐ray diffraction, thermogravimetric analysis, and scanning electron microscope (SEM). The results showed that the cure time and scorch time of the composites filled with CC and ES are lower than the composites filled FB filler. On the other hand, composites with ES and CC showed enhanced values of tensile, modulus at 100% and 300% elongation, hardness, and abrasion resistance. The morphological data revealed that CC and ES fillers are better dispersed in the rubber matrix than FB filler. J. VINYL ADDIT. TECHNOL., 26:309–315, 2020. © 2019 Society of Plastics Engineers     

轻型载重子午线轮胎胎面胶配方优化设计

对轻型载重子午线轮胎胎面胶配方进行优化。试验结果表明,胎面胶采用天然橡胶5,丁苯橡胶80,顺丁橡胶15,增大炭黑和芳烃油的用量,并对配方其他组分进行适当调整,胎面胶硬度和300%定伸应力增大,拉伸强度、拉断伸长率和拉断永久变形减小,胎面胶性能能够满足轻型载重子午线轮胎使用要求,生产成本降低。     

A comparative study on curing characteristics and thermomechanical properties of elastomeric nanocomposites: The effects of eggshell and calcium carbonate nanofillers

After‐hatching eggshell (AHES) nanobiofiller and nanocalcium carbonate (nano‐CA) were separately added to various elastomers, such as acrylonitrile butadiene rubber (NBR), styrene butadiene rubber (SBR), and natural rubber (NR), in various amounts of 5, 10, and 15 phr. The effect of particle size and dispersion of such nanofillers on thermomechanical properties and curing characteristics were then investigated. The ultimate tensile properties of SBR and NR nanocomposites were improved to some extent when 5 phr of AHES nanofiller was added to the rubber compound compared to CA. In the case of NBR nanocompounds, however, the mechanical properties were seemingly comparable, irrespective of the type of nanofiller. This contradictive behavior could be attributed to the alteration of crosslink density due to particular filler–matrix interaction while using mineral and natural fillers. The results of the rheometric study revealed that using AHES rather than CA slightly increases the scorch time of all types of prepared nanocomposites, whereas a significant drop in the optimum curing time was seen for NBR nanocomposites containing AHES biofiller. Moreover, thermogravimetric analysis showed similar thermal stability for SBR nanocomposites containing AHES and CA fillers. Finer particle size of CA and higher porosity of AHES at high and low loading levels were respectively the main reasons for improvement of ultimate properties. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

硅灰石表面改性及其在丁苯橡胶中的应用

以硅灰石为原料，用干法改性优化出改性剂的种类，再用该改性剂，利用ZM振动磨探讨了硅灰石表面改性的工艺条件：当硬脂酸质量分数为2％、改性时间为9min、处理量占ZM振动磨容量的10％时，经沉降体积法、表面接触角法、红外光谱等方法及填充丁苯橡胶试验证实，硅灰石改性效果最佳；且填充丁苯橡胶物理机械性能有明显提高，试样拉伸强度增加，永久变形，邵尔A型硬度增大。     

高抗冲高刚性EPDM改性聚丙烯的研究

加入超细改性无机刚性粒子提高三元乙丙橡胶(EPDM)的硬度，再与聚丙烯(PP)进行共混。研究了超细改性无机刚性粒子用量对EPDM硬度及流动性的影响，比较了PP与不同硬度EPDM的共混物在力学性能上的差异。结果表明：随着EPDM硬度的增加，共混物不仅韧性提高，弯曲模量也大幅度上升。选择合适的硬度，可制得高抗冲高刚性的EPDM改性PP共混材料。     

高硬度高强度双组分脱醇型室温硫化硅橡胶的研制

研究了云母粉、硅微粉、石英粉和氧化锌四种填料以及脱氢和脱醇两种硫化体系对室温硫化(RTV)硅橡胶室温力学性能和热空气老化性能的影响,确定以高强度脱氢型RTV硅橡胶基膏为基础、硅微粉为增硬填料、正硅酸乙酯为交联剂、二月桂酸二丁基锡为催化剂制备高硬度高强度双组分脱醇型RTV硅橡胶。该硅橡胶的邵尔A硬度达到65度,拉伸强度5.4 MPa;经过300℃×168 h老化后,其拉伸强度为4.2 MPa,拉断伸长率为107%,综合性能稍优于RTV88。     

有机硅导热垫片性能的研究

以双组分室温硫化硅橡胶为基体树脂,Al₂O₃与Al(OH)₃为填料制备有机硅导热垫片。对垫片的导热性能、力学性能进行测试,并对影响渗油的因素进行分析。结果表明,随着填料量的增大,有机硅导热垫片的硬度、导热系数增大,渗油量减少;相同填料添加量时,官能团r[r=n(Si-Vi)/n(Si-H)]对渗油的影响较大,4种不同r值树脂制备垫片的渗油量随着r值增大而增大,当r=3.25时,甚至出现交联不完全现象;官能团比例相同时,交联密度较大的垫片,渗油量较小。     

正交试验方法在硅橡胶/EPDM泡沫中的研究

试验了硫化活性剂对硅橡胶/三元乙丙胶（EPDM）共混胶力学性能与发泡效果的影响，并对硅橡胶/EPDM泡沫进行了正交设计试验、回归分析，获得了表征橡胶泡沫配方性能的关系式。试验表明，硫化活性剂具有提高泡沫材料的力学性能的作用，正交试验能够得大量的试验信息，回归关系式具有较高的可信度（0.95)，与验证值符合较好。     

Use of rice husk ash as filler in natural rubber vulcanizates: In comparison with other commercial fillers

Rice husk ash is mainly composed of silica and carbon black remaining from incomplete combustion. Both silica and carbon black have long been recognized as the main reinforcing fillers used in the rubber industry to enhance certain properties of rubber vulcanizates, such as modulus and tensile strength. In this study, two grades of rice husk ash (low‐ and high‐carbon contents) were used as filler in natural rubber. Comparison was made of the reinforcing effect between rice husk ashes and other commercial fillers such as talcum, china clay, calcium carbonate, silica, and carbon black. Fourier transform infrared spectroscopy (FTIR) analysis was employed to study the presence of functional groups on the ash surface. The effect of silane coupling agent, bis(3‐triethoxysilylpropyl)tetrasulfane (Si‐69), on the properties of ash‐filled vulcanizates was also investigated. It was found that both grades of rice husk ash provide inferior mechanical properties (tensile strength, modulus, hardness, abrasion resistance, and tear strength) in comparison with reinforcing fillers such as silica and carbon black. However, the mechanical properties of the vulcanizates filled with rice husk ash are comparable to those filled with inert fillers. The addition of silane‐coupling agent has little effect on the properties of the ash‐filled vulcanizates. This is simply due to the lack of silanol groups on the ash surface. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2485–2493, 2002