胎面再生胶/天然橡胶共混胶性能研究

以胎面再生胶(RU复合胶)为研究对象，通过添加少量天然橡胶(NR)与之共混制备高性能共混胶料。研究了胎面胶再生胶RU 与NR 共混胶的共混比、补强体系、软化体系和防老体系，以及各体系对共混胶的硫化特性、硫化胶的力学性能和耐热老化性能的影响。结果表明，纯胎面胶再生胶RU 具有较好的综合性能。通过与NR 生胶共混，进一步改善了再生胶的加工性能、力学性能和老化性能。对比了多种防老剂对共混胶耐热老化性能的影响，防老剂4010NA以及264的防老效果都较理想。当胎面再生胶中加入20phr的NR生胶,炭黑N220用量为20phr,增塑剂30^#机油为8～12phr,防老剂为1phr 时，共混胶具有较好的力学性能和老化性能，其拉伸强度保持率和拉断伸长率保持率均在90%以上。     

SBR/TRR共混胶共混方法对农业轮胎侧胶性能的影响

通过未硫化胶塑性测定、硫化特性测定、硫化胶基本性能测定、炭黑分散性测定、力学性能测定、屈挠龟裂性能测定、老化性能测定和压缩生热性能测定等来判断选择SBR/TRR共混胶在农业胎侧胶中较合适的共混方法,以达到轮胎侧胶较好的性能。结果表明:2#、3#共混方法制备的胶料综合性能最优,且符合农业轮胎侧胶性能标准;一段共混方法比二段共混方法制备的胶料性能相对较好,且有利于节约台时和能源;将轮胎再生胶应用在农业轮胎生产中有利于减少环境污染,使得橡胶资源得到充分合理的循环利用。     

溴化丁基再生胶在三角带硫化胶套及胶板中的应用

以不同工艺制备了溴化丁基再生胶(BIIR再生胶),并将其应用于三角带加热胶套和胶板中部分替代溴化丁基橡胶(BIIR)或三元乙丙橡胶(EPDM),研究了再生橡胶替代量及硫化体系对三角带加热胶套及胶板性能的影响。结果表明,并用少量BIIR再生胶对制品混炼胶的硫化特性影响不大。密炼再生制备的BIIR再生胶在胶套中的最佳替代量为5份,此时胶套硫化胶的物理性能及老化性能优异。开炼机再生制备的BIIR再生胶在胶板中应用最佳并用质量比为20/80(再生胶/EPDM),硫化体系为二-(叔丁基过氧化异丙基)苯(DCP)硫化,此时共混胶性能最佳。因此,再生胶的应用既能保证胶套、胶板制品性能不下降,还能降低原材料的成本及生产的能耗,废胶套再生及再生胶应用具有重要的现实意义。     

微氧再生胶在工程轮胎胎侧胶中的应用

通过微氧解交联法制备了两种不同门尼黏度的的微氧再生胶,将其应用到工程轮胎胎侧胶中,探究了再生胶用量对胎侧胶性能的影响。结果表明,随微氧再生胶含量的增加,胶料的正硫化时间、转矩差值逐渐减小,Payne效应增加;硫化胶的拉伸强度、硬度及回弹性逐渐下降,而拉断伸长率及定伸应力基本不变。添加低门尼微氧再生胶的胶料拉伸强度、定伸应力耐老化性能较好,添加高门尼微氧再生胶的胶料回弹性与硬度较高,Payne效应低,炭黑分散性更好。     

橡胶小辞典2条

胎面再生橡胶peel reclaim指用废轮胎的胎面作原料,经破碎、脱硫而制得的再生橡胶。由于轮胎胎面含胶量较高,力学性能较好,因此制得的再生胶性能也较好。这种再生胶可与生胶并用,制造轮胎的某些部件。     

高强力再生胶粉在全钢载重子午线轮胎胎侧胶中的应用

研究高强力再生胶粉在全钢载重子午线轮胎胎侧胶中的应用。结果表明,添加5份高强力再生胶粉对全钢载重子午线轮胎胎侧胶的性能无不良影响,且能降低轮胎的生产成本。     

再生胶在轿车子午线轮胎胎侧胶中的应用

研究再生胶在轿车子午线轮胎胎侧胶中的应用.结果表明,在轿车子午线轮胎胎侧胶配方中使用5份再生胶,能够在保证胶料各项性能基本不变的情况下,适当改善胶料的耐屈挠性能和老化后性能;成品轮胎的高速性能和耐久性能良好,每年可节约成本120万元.     

废旧轮胎再生胶在轿车子午线轮胎胎侧胶中的应用

研究废旧轮胎再生胶（简称再生胶）在轿车子午线轮胎胎侧胶中的应用。结果表明：随着再生胶用量的增大,胶料的硫化速度减慢,300%定伸应力、拉伸强度、回弹值明显减小,耐屈挠性能下降,滞后损失增大;在轿车子午线轮胎胎侧胶中加入5份再生胶,胶料的加工性能和物理性能基本不变,成品轮胎的高速和耐久性能满足国家标准要求,同时生产成本降低。     

SBR/TRR共混胶的共混比对农业轮胎侧胶性能的影响

研究了丁苯橡胶(SBR)/轮胎再生胶(TRR)的共混胶共混比对农业轮胎侧胶性能的影响。通过对未硫化胶塑性测定、硫化特性测定、炭黑分散性测定;硫化胶基本性能测定、力学性能测定、耐磨性能测定、老化性能测定和压缩生热性能测定等来判断选择SBR/TRR共混胶较合适的共混比,以达到轮胎侧胶较好的性能。结果表明,随着再生胶用量的增加,胶料流动性增加,撕裂强度增加,拉伸强度稍下降,且其它性能也相对较好,能满足使用要求。综合比较采用配方5#(SBR/TRR共混胶共混比为40∶20)炼制成的胶料性能最好,炭黑分散性最好,屈挠性较好,生热温度较低,拉伸强度和撕裂强度均较高,耐臭氧老化和热氧老化性能较好。     

天然橡胶/再生胶共混胶核磁共振交联密度与共混均匀性的研究

制备了再生胶(RR)不同用量的NR/RR共混胶,并使用核磁共振交联密度仪和RPA对其交联密度与粘弹性进行了研究.结果表明,再生过程中再生胶大分子主链断裂,网络二次重构时不能形成完整的交联网络,两相结构混合不均匀,导致力学性能下降;共混胶中天然橡胶/再生胶橡胶烃比例接近1/1时,共混均匀性最差.其硫化胶力学性能随RR用量的增加先升高后下降.     

Dynamic mechanical properties and flexing fatigue resistance of tire sidewall rubber as function of waste tire rubber reclaiming degree

A stepwise downsizing method of gel particles in reclaimed rubber to a micro-nano scale and its excellent dynamic performance in tire sidewall were introduced by this work. The results showed that the size of gel particles decreased from several micrometers to micro-nanometers with the increase of reclaiming degree, accompanied by reduced molecular weight and widened molecular weight distribution of sol fraction. The addition of reclaimed rubber with low Mooney viscosity improved the dynamic mechanical properties of the natural rubber/butadiene rubber blends effectively, including wet resistance and rolling resistance. Moreover, the flexing fatigue resistance has also been improved dozens of times compared to traditional tire sidewall.     

Structure and performance of reclaimed rubber obtained by different methods

Four different reclaiming methods involving important reclaiming factors such as temperature, shear force, and atmosphere were used to reclaim ground tire rubber. The structure and performance of the reclaimed rubber were investigated. The reclaimed samples were all found to be mixtures of three parts: the sol part, a loosely crosslinked gel part, and low molecular substances. For a reclaimed product to have both good processability and mechanical properties, the ideal structure should be that the sol fraction and its molecular weight (M_n) are as high as possible. However, the high sol fraction and high M_n cannot be reached at the same time because of the nonselective scission of the main chain and crosslink bonds. Thus, for a reclaimed rubber to have high quality, the presence of some amount of gel fraction is essential. Our preliminary results showed that the recommended reclaiming method would be a process under oxygen‐free atmosphere, without severe shear force, and at relative low temperature. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Rheology,cure characteristics,physical and mechanical properties of tire tread reclaimed rubber/natural rubber compounds

This work aimed to examine the effect of addition of tire‐tread reclaimed rubber on the properties of two natural rubber (NR) compounds with respect to the reclaimed rubber concentration and mastication time, the properties of interest including rheological and cure characteristics, physical and mechanical properties. The results under the test conditions suggested that Mooney Plasticity and shear viscosity increased with reclaimed rubber content, but decreased with mastication time. The greater the molar mass of the natural rubber the higher the sensitivity to the change in compound viscosity due to mastication and reclaimed rubber content. The die swell was more dependent on the reclaimed rubber than the molar mass of the rubbers. The cure rate and scorch time were found to increase and decrease with reclaimed rubber content, respectively, whereas the cure time was independent of the reclaimed rubber content. For vulcanized rubbers, it was also observed that 100% modulus of the rubber increased with reclaimed rubber content, but this was not the case for tensile stress and elongation at break. The hardness and heat buildup properties of the vulcanizates increased with reclaimed rubber content whereas the tear strength became independent of the reclaimed rubber. The findings in this work suggested that the variations in the rheological and cure characteristics for the unvulcanized rubber were very much dependent on the molar mass of the rubber whereas the mechanical properties for the vulcanized rubber were influenced by crosslink density. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1723–1731, 2003     

振兴橡塑机械工业发展第三橡胶资源

我国目前已成为世界第一橡胶消费大国和进口大国.然而,我国橡胶资源严重短缺,预测未来五年橡胶消费量仍保持旺盛增长局面.建议大力发展再生橡胶工业.再生胶具有天然胶、合成胶的性能,属于环保产业,发展再生橡胶工业符合＂十一五＂发展纲要的要求,是建设资源节约型、环境友好型社会的最好方法.     

Independent investigation on the influences of the processing conditions on the reclamation of crosslinked isoprene rubber after the impregnation of a reclaiming reagent

In this study, the reclamation of sulfur (S)‐cured isoprene rubber (IR) was investigated independently after the impregnation process of the reclaiming reagent diphenyl disulfide (DD) into the crosslinked IR matrix with supercritical carbon dioxide (scCO₂) as the transmission medium. According to the mass uptake of DD into IR and scanning electron microscopy–energy‐dispersive X‐ray spectrometry measurements, DD was highly impregnated and homogeneously dispersed in the network under 12 MPa at 80°C for 11 h in scCO₂. During the impregnation process, almost no reclaiming reaction occurred. Then, through three different reclaiming methods, a mechanochemical method, a chemical method with oxygen, and a chemical method without oxygen, the influences of the shear force, reclaiming atmosphere, reaction time, and amounts of reclaiming reagent on the reclamation with crosslinked IR with pre‐impregnated DD were independently investigated and compared with those of the reaction without pre‐impregnated DD. The sol fraction of the reclaimed rubber and molecular weight of the sol were measured. The results show that the reclaiming speed greatly depended on the amount of reclaiming reagent and that the reclaiming reaction was dramatically accelerated when the reclaiming reagents were pre‐impregnated into the crosslinked IR under the same processing conditions. This indicated that the impregnation time of the reclaiming reagent into the crosslinked network constituted a large proportion of the reclaiming time. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40298.     

CM和HDPE对再生橡胶物理机械性能的影响

研究CM和HDPE对再生橡胶物理机械性能的影响。结果表明,再生橡胶的门尼粘度随着CM用量的增加而降低,随着HDPE用量的增加而增加。再生橡胶的拉伸强度和拉断伸长率随着CM和HDPE用量的增加逐渐增加;扫描电镜研究表明,添加CM的再生橡胶硫化胶的拉伸断面相对平整,断层更均匀。综合比较当CM用量为8phr时,再生橡胶的综合性能最佳。     

水滑石对轮胎胎侧橡胶复合材料微观形貌与性能的影响

将水滑石（LDHs）加入到轮胎胎侧橡胶中制得LDHs/橡胶复合材料,研究了LDHs在橡胶复合材料中的分散状态及对胎侧橡胶复合材料的硫化特性、力学性能和耐老化性能的影响。结果表明,LDHs穿插在炭黑粒子之间,形成均匀分散;LDHs可以促进硫化,缩短橡胶复合材料的硫化时间,并提高其定伸应力和撕裂强度、改善耐老化性能。当LDHs的用量为4份（质量）时,与未添加LDHs橡胶复合材料相比的抗张积老化系数提高了25.7%。     

脱硫胶粉在乳化改性沥青中的应用

考察了不同规格胶粉及不同脱硫程度的脱硫胶粉对橡胶改性乳化沥青性能的影响,结果表明,采用100目胶粉即可制备出橡胶改性乳化沥青,但乳化沥青的性能较差;采用活化度为50%左右的100目脱硫胶粉制备乳化沥青时,脱硫胶粉的用量相比于胶粉可大幅提高;在通过外掺100目50%左右活化度的脱硫胶粉(质量分数15%,以沥青计,下同)和质量分数2%的苯乙烯-丁二烯-苯乙烯嵌段共聚物改性的乳化沥青中添加质量分数1%的丁苯胶乳,所制备橡胶改性乳化沥青无筛上剩余物,5 d储存稳定性为2.9%,蒸发残留物的25℃针入度、软化点和5℃延度分别为55 (0.1 mm)、64.5℃和22.5 cm,能够满足乳化改性沥青的技术指标要求。     

螺杆挤出法生产再生胶

简介了螺挤出法生产再生胶的工艺原理、再生过程，以及由美国再生胶公司和沈阳化工学院开发的螺挤出机的结构特点和设计参数。比较了沈阳化工学院开发的螺杆挤出生和国内油法或水油法再生的特点，表明前者由螺村挤出机代替了后者的脱硫胶盘和脱硫罐，节省了设备，且由间歇生产转化为连续生产，产品性能达到国家标准。     

再生胶/粉煤灰路面材料

制备了再生胶/粉煤灰路面材料,讨论了聚氯乙烯用量、天然橡胶用量、铝酸酯偶联剂质量分数(以粉煤灰用量为基准)和粉煤灰用量对其性能的影响。结果表明,当再生胶用量为100份、聚氯乙烯用量为10份、天然橡胶用量为40份、铝酸酯偶联剂质量分数为2·2%、粉煤灰用量为60份时,再生胶/粉煤灰路面材料的综合性能最佳,符合路面材料的标准。