不同偶联剂对废胶粉性能的影响

研究了改性废胶粉的硫化特性和力学性能;考察了不同种类偶联剂对改性废胶粉力学性能的影响。结果表明,随着Si69用量的提高,改性废胶粉的拉伸强度、撕裂强度、耐磨性得到提高。     

改性废胶粉对氯丁橡胶性能的影响

将经间苯二酚和六次甲基四胺改性的废胶粉与氯丁橡胶(CR)共混,制备改性废胶粉/CR共混物。研究了废胶粉的改性方法对共混物性能的影响,并探讨了废胶粉用量对共混物硫化特性和物机性能的影响。研究结果表明:废胶粉经间苯二酚和六次甲基四胺改性后,共混物的综合力学性能较未改性废胶粉的提高,Tg变化不大。     

生物改性废胶粉对氯丁橡胶性能的影响

将废胶粉经生物改性后与氯丁橡胶（cR）共混,制备生物改性废胶粉／CR共混物。研究了CR和废胶粉的共混方法对共混物性能的影响,并探讨了生物改性废胶粉用量对共混物硫化特性和力学性能的影响。研究结果表明：废胶粉经生物改性后,共混物的拉伸强度较未改性废胶粉的提高,玻璃化转变温度（堍）变化不大。     

废胶粉改性方法的研究进展

介绍了废旧橡胶资源化再利用的发展趋势,分析了硫化胶粉在胶料中的作用,并重点综述了近几年来国内外废胶粉改性的主要方法。最后,对废胶粉改性方法的发展进行了展望。     

废胶粉和锯末对废纸浆性能的影响

试验研究废胶粉和锯末对废纸浆性能的影响.结果表明:废胶粉/废纸浆、锯末/废纸浆和废胶粉/锯末/废纸浆复合材料的物理性能提高,且废胶粉/废纸浆复合材料的物理性能优于废胶粉/锯末/废纸浆复合材料,因此以废胶粉改性废纸浆效果较好.废胶粉/废纸浆复合材料的最佳配方为:废纸浆100(干基计),废胶粉8,防老剂D 0.2,硫黄0.2,促进剂M 0.2;最佳固化条件为150℃/10 MPa×30 min.此时材料表面比较光滑,结构紧密,排列比较均匀,废胶粉与废纸浆的相容性较好.     

废胶粉填充改性ABS复合材料的性能研究

采用熔融共混挤出的方法,选用三种废胶粉填充丙烯腈一丁二烯一苯乙烯共聚物（ABS）,制备了废胶粉／ABS复合材料;研究了废胶粉对复合材料力学性能的影响。结果表明：废胶粉与ABS的相容性不好,界面结合力较弱。废胶粉的加入降低了复合材料的拉伸强度和弯曲强度,提高了断裂伸长率。废旧丁腈橡胶粉的加入有利于提高冲击强度,有一定的增韧效果,但其他两种废胶粉则达不到增韧的目的。     

不同填料增强废胶粉基复合材料阻尼性能

研究了碳纳米管、玻璃纤维、丁腈橡胶、高阻尼橡胶为填料的废胶粉基复合材料在剪切模式下的阻尼性能,测试了部分试件的断口形貌。结果表明：填料不同,废胶粉基复合材料的阻尼性能不同;高阻尼橡胶的增强效果较好。     

废胶粉填充改性PP复合材料

采用熔融挤出共混的方法,选用三种废胶粉填充聚丙烯(PP),制备了PP/废胶粉复合材料,研究了废胶粉质量分数对复合材料力学性能的影响.结果表明:废旧三元乙丙橡胶粉可明显提高复合材料冲击强度和拉伸断裂应变,当其质量分数为60%时,简支梁缺口冲击强度可提高33%,拉伸断裂应变增大了26%,有显著的增韧效果:废旧杂胶粉的加入使...     

废胶粉的改性及工业应用

随着废旧橡胶的产量逐年增加,如何有效利用废旧橡胶资源已成为当务之急,胶粉是目前废橡胶的主要回收利用方式之一,但因为胶粉表面活性低,与基体材料的相容性差,在使用时需对其进行改性处理。本文介绍了目前国内外废胶粉的主要改性方法,如再生脱硫改性、机械力化学改性、聚合物涂层改性、接枝或互穿聚合物网络改性、有机-无机杂化等方法,并对胶粉在橡塑、铺装、建筑等领域的应用现状进行了综述。     

含有改性废胶粉的橡胶性能之评价

文中评价了用改性废胶粉和未改性废胶粉填充的胶料之硫化胶的性能及应用.     

CTC-IPN型原位改性废橡胶粉技术应用研究

将共轭三组分互穿聚合物网络（CTC-IPN）原位改性废橡胶粉技术应用于生产配方中,采用扫描电子显微镜（SEM）、能谱仪（EDX）分析了复合材料的结构,研究了混炼胶的门尼粘度、复合材料的热氧老化性能、迁移性能等。实验结果表明,在43%-55%含胶量的生产配方上,添加较多的250μm改性胶粉后（配方含胶量降为34%-42%）,复合材料的性能优于或达到生产配方的性能;添加改性胶粉的复合材料的性能好于添加相同量杂胶粉的复合材料性能。     

胶粉的分析研究

胶粉的利用研究越来越多，但对胶粉本身的结构研究却很少，笔者利用红外，热重分析，裂解气相色谱－质谱等方法，对胶粉进行了分析研究，为分析胶粉的组成结构提供了一条有效的途径。     

废旧硫化胶粉的利用

介绍了废旧硫化胶粉的种种利用方法,包括硫化胶粉的直接利用、表面改性利用和再生利用等,并对充化胶粉的利用提出了建议。     

胶粉弹性体的粉末成型及改性

采用传统的高分子成型设备,通过添加少量的三羟甲基丙烷三甲基丙烯酸酯(TMPTMA),经界面原位反应制备了具有良好性能的胶粉弹性体,研究了成型温度、成型时间和TMPTMA用量对胶粉弹性体性能的影响,并用扫描电镜分析了该胶粉弹性体的界面形态。结果表明,成型温度、成型时间和TMPTMA用量对胶粉弹性体的力学性能产生了显著影响,其最佳条件为200℃,60min,3份;在胶粉中加入的TMPTMA可同胶粉形成交联结构,增强了与胶粉的黏合程度,从而使得胶粉弹性体的界面得到了明显的改善。     

改性淀粉对炭黑填充丁苯橡胶/顺丁橡胶并用胶性能的影响

用改性淀粉替代部分炭黑填充丁苯橡胶(SBR)/顺丁橡胶(BR)并用胶,考察了改性淀粉用量及偶联剂种类对混炼胶硫化特性及硫化胶物理机械性能和动态力学性能的影响.结果表明,用改性淀粉替代部分炭黑可对SBR/BR混炼胶的硫化产生明显的延迟作用,但改性淀粉用量的变化对焦烧时间与正硫化时间影响不大;添加偶联剂KH-570或NDZ-201延迟了混炼胶的硫化过程,KH-550能大幅度地促进硫化作用,Si-69对于体系的硫化性能略有影响;随着改性淀粉用量的增加,SBR/BR硫化胶的拉伸性能、耐磨耗性均有所降低,但弹性、动态生热和滞后性能得到了明显改善,改性淀粉最佳用量为5～8份;各种偶联剂均可提高SBR/BR硫化胶的拉伸性能,硅烷偶联剂Si-69和KH-570对弹性和动态生热也略有改善,添加偶联剂KH-550改善了SBR/BR硫化胶的抗湿滑性能,但滞后性能变差,添加偶联剂KH-570或Si-69对SBR/BR硫化胶动态力学性能的影响较小,综合考虑,以添加偶联剂KH-570较好.     

Mechanical properties of high‐density polyethylene/scrap rubber powder composites modified with ethylene–propylene–diene terpolymer,dicumyl peroxide,and silicone oil

The effect of ethylene–propylene–diene terpolymer (EPDM), dicumyl peroxide (DCP), and dimethyl silicone oil on the mechanical properties of high‐density polyethylene (HDPE) composites filled with 60 mesh cryogenically scrap rubber powder (SRP) was studied. The addition of 10 wt % EPDM, 0.2 wt % DCP, and 4 wt % dimethyl silicone oil significantly increased both the impact strength and elongation at break of the HDPE/SRP composites. After the modification, the impact strength increased by 160%, and the elongation at break increased by 150% for the composites containing 40 wt % SRP. The impact load–time curves showed that the increase of impact energy for the modified composites was attributed to the increase of the maximum force at yield point and the ductile deformation after yielding. The rheological behavior, dynamic mechanical properties, and morphology observation suggested that an enhanced adhesion between SRP and polymer matrix formed in the modified HDPE/SRP composites. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 2020–2027, 2003     

Vulcanization characteristics and mechanical properties of natural rubber–scrap rubber compositions filled with leather particles

Scrap rubber recycling combined with waste leather particles in natural rubber compounds has been studied. The effect of leather and scrap rubber loading on vulcanization characteristics of natural rubber compounds has been evaluated. The presence of leather was found to reduce the scorch time and increase the maximum and minimum torque. While reversion was not observed in the absence of leather at 150 °C, it was more prominent when leather was incorporated. Mechanical properties such as tensile strength, elongation at break, tear strength, modulus and hardness were found to increase on increasing the scrap rubber loading in the absence of leather. Compounds containing leather exhibited higher tensile strength, modulus, hardness and tear strength values but the modulus and hardness values were found to decrease as the scrap rubber loading increased. All the vulcanizates exhibited only limited swelling in different media as the swelling of one phase of the composite was found to be restricted by the other phase. Copyright © 2004 Society of Chemical Industry     

改性Kevlar纳米纤维对羧基丁腈橡胶/丁苯橡胶共混胶力学性能的影响

采用环氧氯丙烷对Kevlar纳米纤维(KNFs)表面进行改性,制备了表面改性KNFs(m-KNFs),考察了m-KNFs对羧基丁腈橡胶(XNBR)/丁苯橡胶(SBR)共混胶力学性能的影响.结果表明,m-KNFs可以增强XNBR/SBR共混胶的拉伸性能及撕裂性能,提高硫化胶的热稳定性和耐溶剂性能.添加5份m-KNFs后,...     

Preparation and mechanical properties of natural rubber powder modified by carbon nanotubes

A suspension of carbon nanotubes in natural latex was obtained by liquid mixing and then was used to prepare powder natural rubber composites modified with carbon nanotubes by means of spray drying process. The composite powders were round‐like and fine, with an average diameter of less than about 5 μm. The dispersion of carbon nanotubes in the rubber matrix was improved remarkably compared with that obtained by the mechanical mixing method. By means of vulcanization tests, it was found that the addition of vulcanizing agent necessary for the powder rubber containing carbon nanotubes should be evidently greater than that in rubber prepared by mechanical mixing, there evidently existed vulcanization reversions for the natural rubber prepared by mechanical mixing, which disappeared in the powder rubber containing carbon nanotubes prepared by the spray drying process. The mechanical properties of the powder natural rubber containing carbon nanotubes were much improved because of the modification effect of carbon nanotubes in rubber. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 4697–4702, 2006