TPI／IR并用胶的性能

考察了反式-1,4-聚异戊二烯（TPI）用量、3种典型促进剂次磺酰胺类CZ、噻唑类DM、秋兰姆类TMTD以及硫磺用量对TPI／异戊橡胶（IR）并用胶性能的影响。结果表明,以CZ为促进剂,当TPI的用量为15～25份,硫磺用量为1．7份时．并用胶可以获得良好的综合性能。同时,还比较了相同配方下的TPI／IR并用胶和天然橡胶（NR）的性能,发现除定伸应力和撕裂强度外,TPI／IR并用胶的其它性能均达到或优于NR硫化胶。     

TPI用量和炭黑分布对TPI/SBR并用胶性能的影响

研究反式1,4-聚异戊二烯(TPI)用量和炭黑分布对TPI/SBR并用胶性能的影响.结果表明,炭黑在TPI/SBR并用胶中存在平衡分布,当其处于平衡分布状态时,并用胶的综合物理性能和动态性能较好;随着TPI用量的增大,并用胶定伸应力、拉伸强度和撕裂强度增大,拉断伸长率和压缩疲劳温升降低.     

液体聚异戊二烯橡胶对天然橡胶/反式聚异戊二烯橡胶并用胶性能的影响

研究液体聚异戊二烯橡胶（LIR-50）用量对未填充和填充填料的天然橡胶（NR）/反式聚异戊二烯橡胶（TPI）（并用比85/15）并用胶硫化特性、结晶性、物理性能和动态力学性能的影响。结果表明：NR/TPI并用胶的t₁₀和t₉₀随着LIR-50用量的增大而延长,且加工流动性变好;在NR/TPI并用胶中TPI的结晶受到抑制,LIR-50用量对NR/TPI并用胶的结晶性影响不大;随着LIR-50用量的增大,NR/TPI并用胶的邵尔A型硬度、300%定伸应力、拉伸强度及储能模量减小;加入3份LIR-50的并用胶的撕裂强度最大、综合物理性能较好;LIR-50加入对NR/TPI并用胶的耐磨性能、抗湿滑性能以及滚动阻力基本无影响。     

TPI／NR并用胶在全钢子午线轮胎胎肩垫胶中的应用

研究了反式-1,4-聚异戊二烯（TPI）不N用量对TPI／天然橡胶（NR）并用胶物理机械性能和动态性能的影响,并对TPI／NR并用胶进行配方优化。结果表明,TPI与NR并用比为15／85时,混炼胶胶片光滑,硫化胶在保持基本配方物理机械性能的基础上,压缩生热性能明显提高,伸张疲劳系数有所提高;经优化配方后,TPI／NR混炼胶的粘合强度提高,硬度适中,利于后续半成品的加工,且硫化胶具有低生热性,滚动阻力降低,是一种较为理想的全钢子午线轮胎胎肩垫胶配合。     

炭黑填充NR/TPI并用胶的性能

研究炭黑品种对NR/反式1,4-聚异戊二烯(TPI)并用胶性能的影响。结果表明,随着炭黑粒径的增大,NR/TPI并用胶焦烧时间延长,交联程度下降;填充炭黑N330的NR/TPI并用胶具有较好的综合物理性能;随着炭黑粒径的增大,NR/TPI并用胶的损耗模量逐渐降低;随炭黑比表面积的增大,当温度低于0℃时,并用胶损耗因子减小,当温度高于0℃时,损耗因子增大。     

炭黑对TPI及其并用胶性能的影响

研究炭黑对反式 1,4 聚异戊二烯 (TPI)及其并用胶性能的影响。结果表明 ,填充炭黑后 ,TPI混炼胶的结晶度和物理性能下降 ;采用粒径较小的炭黑补强的TPI硫化胶、NR/TPI和SBR/TPI并用硫化胶的物理性能较好 ,但动态性能较差 ,采用粒径较大的炭黑补强的这 3种胶料的动态性能较好 ,但物理性能较差 ;采用炭黑N3 3 0补强的NR/TPI和SBR/TPI并用胶综合性能较好 ,可用作高速低滚动阻力轮胎胎面胶。     

低相对分子质量反式-1,4-聚异戊二烯蜡在NR/TPI并用胶中的应用

将低相对分子质量反式-1，4-聚异戊二烯蜡（LMTPIW）代替芳烃油用于天然橡胶（NR）和反式-1，4-聚异戊二烯（TPI）并用胶中．研究其对并用胶性能的影响。结果表明，用LMTPIW代替芳烃油用于NR／TPI并用胶中，操作方便，可改善混炼胶的加工性能，混炼胶的焦烧时间延长；提高了硫化胶的拉断伸长率、撕裂强度、屈挠性能；改善了炭黑的分散性；热空气老化性能略有下降。LMTPIW用量在10～15份时，与加入5份芳烃油后的增塑效果相当．屈挠性能可提高2～4倍，胶料的综合性能最佳。     

NR/TPI并用胶性能的研究

研究了反式-1,4-聚异戊二烯（TPI）用量对天然橡胶（NR）/TPI硫化胶力学性能和动态性能的影响。结果表明,NR/TPI并用比为80/20时,硫化胶在保持常规力学性能的基础上,动态疲劳性能显著提高,生热降低。采用溶液法合成的TPI与NR并用后,并用胶动态疲劳性能进一步提高。     

炭黑氧化度对顺丁橡胶/天然橡胶并用胶性能的影响

研究炭黑氧化度对顺丁橡胶（BR）/天然橡胶（NR）并用胶性能的影响。经高温脱挥或氧化处理后炭黑填充的BR/NR并用胶的门尼粘度增大,加工性能变差;与未处理的炭黑填充BR/NR并用胶相比,高温脱挥处理炭黑填充BR/NR并用胶的300%定伸应力、拉伸强度和压缩疲劳温升提高,耐老化性能降低;随着炭黑氧化度的增大,BR/NR并用胶的300%定伸应力、拉伸强度、撕裂强度和压缩疲劳温升降低;随着炭黑挥发分含量和氧化度的减小,0和60 ℃时BR/NR并用胶的损耗因子增大。     

P(SBR/NR/HAF)并用胶的性能

在SBR胶乳／NR胶乳共混的基础上，采用凝聚共沉法制备高耐磨炭黑（HAF）填充型粉末丁苯橡胶／天然橡胶并用胶[P(SBR/NR/HAF)]。研究了SBR／NR并用比、制备工艺等对P（SBR／NR／HAF）并用胶的混沌流变性能和物理机械性能的影响，并与块状SBR／NR／HAF并用胶进行了比较。研究表明，与SBR／NR／HAF相比，P（SBR／NR／HAF）的表观剪切粘度在SBR用量小于50份时对混炼时间的依赖性较低，而在SBR用量大于50份后对混炼时间具有更高的依赖性；P（SBR／NR／HAF)硫化胶 拉伸强度在整个并用范围内对SBR／NR并和比不敏感；采用胶乳预混合的工艺制备的P（SBR／NR／HAF）具有较好的物理机械性能。     

HNBR4种补强填充体系的研究

分别研究了炭黑N330,炭黑N550,炭黑N660和炭黑N774对氢化丁腈橡胶（HNBR）硫化特性和力学性能的影响,并考察了4种炭黑在HNBR中的分散度和Payne效应。结果表明,炭黑N550的胶料焦烧时间和正硫化时间均最长,分散度最好。随着炭黑粒径的逐渐增大,硫化胶拉伸强度、定伸应力和硬度均逐渐减小,拉断伸长率却逐渐增大。4种炭黑胶料的Payne效应强弱顺序为炭黑N330〉炭黑N550〉炭黑N660〉炭黑N774。     

EPDM的性能研究

研究了炭黑N330、石蜡油及硫黄用量对EPDM硫化胶力学性能的影响。结果表明，随着炭黑N330用量的增大，EPDM硫化胶的硬度和拉伸强度都增大；随着石蜡油用量的增加，EPDM硫化胶的硬度和拉伸强度都下降；随着硫黄用量的增加，EPDM硫化胶的硬度增大，拉伸强度出现先减小后增大的规律。应用3变量中心复合设计法，通过回归分析，可考察不同用量炭黑、石蜡油和硫黄对EPDM硫化胶力学性能的影响。     

氟橡胶耐热氧老化性能的研究

研究炭黑N330/N990用量比对过氧化物硫化体系氟橡胶物理性能和耐热氧老化性能的影响,并与双酚A硫化体系氟橡胶进行比较。结果表明:随着炭黑N330/N990用量比增大,过氧化物硫化体系氟橡胶的物理性能和耐热氧老化性能提高,压缩永久变形明显减小;当炭黑N330/N990用量比较大时,氟橡胶的物理性能变化不大;与双酚A硫化体系氟橡胶相比,过氧化物硫化体系氟橡胶的硬度和定伸应力较小,拉伸强度和拉断伸长率较大,耐热氧老化性能较好。     

废旧轮胎裂解炭黑在橡胶地板中的应用

对比废旧轮胎裂解炭黑(CBp)和炭黑N330的理化性能,研究CBp部分替代炭黑N330对橡胶地板胶料性能的影响。结果表明:CBp灰分含量较大,结构度较低,其他理化性能与炭黑N330基本相当;在橡胶地板胶料中用CBp替代30%炭黑N330,胶料的硫化特性、硫化胶的物理性能和耐老化性能、橡胶地板的使用性能均符合普通橡胶地板的技术要求,且有效降低了生产成本。     

An investigation on the reinforcing potential of red earth as filler for natural rubber compounds

Locally sourced red earth (RE) was air‐dried, pulverized, and screened with a sieve of mesh size 75 nm. It was characterized in terms of its moisture content, loss on ignition, silica content, iodine adsorption number, oil absorption, pH, and metal oxide compositions. Natural rubber, standard Nigerian rubber used for this work was first characterized in terms of its dirt, ash and nitrogen contents, volatile matter, plasticity retention index, and Mooney viscosity. The RE was applied as filler wholly and in blends with standard carbon black, CB (N330) filler in the natural rubber compounding using efficient vulcanization system. The cure and the physicomechanical properties of the compounds and vulcanizates were, respectively, measured as function of filler loading. The results were compared with those of the standard carbon black (N330)‐filled natural rubber. It was found, that the RE‐filled natural rubber showed substantial reinforcement of the rubber, though inferior to carbon black (N330) filled vulcanizates, the tensile strength of the carbon black‐filled vulcanizates is about one half times that of the RE‐filled vulcanizates. The tensile properties of the RE‐filled vulcanizates improved markedly by blending the RE‐filler with the carbon black (N330). © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

高耐磨炭黑填充型粉末SBR研究Ⅱ.硫化胶的物理机械性能

研究了高耐磨炭黑(N330)填充型粉末丁苯橡胶[P(SBR／N330)]硫化胶的物理机械性能。结果发现。炭黑乳化剂的用量、炭黑改性剂和包覆剂的用量及玻璃化转变温度对P(SBR／N330)硫化胶的物理机械性能的影响比较明显。在适宜的粉末化条件下制备的P(SBR／N330)，其硫化胶的物理机械性能与块状SBR／N330通过机械混炼得到的硫化胶的物理机械性能处于相同水平。P(SBR／N330)硫化胶拉伸断面形貌的SEM分析表明，包覆剂在用量为5份时形成的粒子与SBR基体结合紧密，在用量为15份时形成的粒子较易剥离。     

高耐磨炭黑填充型粉末NR研究(Ⅲ)硫化胶的物理机械性能

研究了高耐磨炭黑(N330)填充型粉末天然橡胶[P(NR/N330)]硫化胶的物理机械性能.结果发现炭黑乳化剂、炭黑、操作油和包覆剂的用量及玻璃化转变温度对P(NR/N330)硫化胶的物理机械性能的影响比较明显.在适宜的粉末化条件下制备的P(NR/N330),其硫化胶的物理机械性能优于天然胶乳与炭黑的简单共沉胶(ENR/N330),而300%定伸应力则低于块状NR/N330机械混炼胶(MNR/N330).P(NR/N330)硫化胶拉伸断面形貌的SEM分析表明,包覆剂在用量为15份时,与NR基体形成互锁结构;DSC分析表明,二者部分相容,因此硫化胶具有较好的物理机械性能.     

DZ系列低滞后炭黑的应用研究

探讨了DZ系列低滞后炭黑在轮胎胎面胶配方中的应用，并与普通炭黑进行对比试验。结果表明，低滞后炭黑DZ－13胶料的300％定伸应力、硬度、磨耗量和压缩温升等性能优于炭黑N330和N220，只是拉伸强度和拉断伸长率略低，用DZ－13低滞后炭黑等量替代炭黑N234，胶料的动态性能有较大提高。     

Studies in the utilization of agricultural waste products as filler in natural rubber compounds

Natural rubber samples were filled with agricultural waste products (cocoa pod husks and rubber‐seed shell) at 50 phr, mixed on a two‐roll mill, and cured using the semiefficient vulcanization system. The physicomechanical properties, tensile strength, modulus at 100% elongation, elongation at break, hardness, abrasion resistance, flex fatigue and compression set, of the agricultural waste products‐filled natural rubber compounds were determined and compared with the values obtained for vulcanisates filled with commercial carbon black (HAF N330). The effect of blending the raw and carbonized agricultural waste products with the commercial grade N330 carbon black on the physicomechanical properties of the natural compounds was studied. It was found that the raw agricultural waste products were ineffective compared with N330 carbon black as reinforcing filler for natural rubber compound mixes and could be classified as semireinforcing fillers. Blends containing up to 40 wt % of the raw agricultural waste products and more than 60 wt % of the carbonized waste products gave natural rubber compounds with comparable physciomechanical properties with compound obtained with N330 carbon black. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2561–2564, 2006     

SBR-clay-carbon black hybrid nanocomposites for tire tread application

Styrene butadiene rubber-organoclay nanocomposites were prepared with Cloisite 15A via melt intercalation. X-ray diffraction and transmission electron microscopy indicated that the nanostructures are partially exfoliated and intercalated. The nanocomposites exhibited great improvements in tensile strength and tensile modulus. The incorporation of organoclay gave rise to considerable reduction of tan delta and increase in storage modulus in the rubbery region. It is shown that after 6 phr (parts per hundred rubber) clay loading there is not much increase in the properties. The effect of carbon black (N330) on mechanical properties, dynamic mechanical properties, heat build up, abrasion resistance in the nanocomposites having the optimized clay level (6 phr) was investigated. Optimum results were obtained with the addition of 25 phr carbon black. For comparison with the 6phr nanoclay and 25phr N330 (high abrasion furnace carbon black) filled SBR composites, 40 phr N330 filled SBR composites was used. The 6phr organoclay and 25phr N330 filled SBR nanocomposite showed better properties than 40phr carbon filled SBR compound. These results indicate that 6phr organoclay can be replaced by 15 phr carbon black from the conventional SBR-carbon black based tire tread compounds. The Dynamic mechanical analyzer (DMA) results revealed that the new tire tread compound gives better rolling resistance and comparable wet grip resistance and lower heat build up than that of conventional tread compound.