出口橡胶垫板胶料的配方优化

通过改变主体材料和硫化体系、添加助硫化体系和耐磨剂、调整补强体系和防护体系对出口橡胶垫板胶料配方进行优化。胶料的优化配方为:天然橡胶 80,顺丁橡胶 20,炭黑N774 60,无机补强剂Si750 70,无机补强剂JC-069 15,活性剂 8,耐磨剂HSR-580 3,抗撕裂树脂HR-801 5,橡胶流动助剂 2,防老剂RD 2,防老剂BLE 1,偶联剂Si69 2,抗硫化还原剂TDB-680 1,硫黄 2,促进剂TMTD 1,促进剂CZ 2,其他 2,总计276。采用优化配方后,出口橡胶垫板的耐磨性能提高,无手摸痕迹,手感和外观质量改善,消除了返蓝现象。     

钢丝绳芯输送带D型覆盖胶的研制

介绍钢丝绳芯输送带D型覆盖胶的研制。主体材料采用天然橡胶／顺丁橡胶并用、补强填充剂采用炭黑N220、硫化体系采用低硫黄高促进剂硫化体系、防护体系采用防老剂4010NA／防老剂RD,微晶石蜡并用的覆盖胶耐磨性能好,可大幅延长钢丝绳芯输送带的使用寿命。     

橡胶原材料分析的现状

橡胶原材料分析的现状增一等著周青山译刘登祥校橡胶制品一般是由橡胶胶料与有机纤维或金属等通过硫化粘合而成的一种复合体。其橡胶胶料除含有主要成分橡胶外,一般还含有炭黑等补强填充剂、硫黄和促进剂等交联剂、防老剂及油类等多种成分。因此橡胶制品的性能不仅受各种...     

耐食油胶料的研制

论述了蝶阀阀芯橡胶密封件用耐食油料的配方设计。结果表明，硫化体系选用低硫高促，防老体系选有防老剂，补强填充体系选用粒径较大的炉黑和沉淀法白炭黑，胶料各种性能良好，满足了用户要求。     

打印机色带盒橡胶海绵导轮的研制

橡胶海绵导轮胶料配方主要组分：生胶为丁腈橡胶，发泡体系为发泡剂ＡＣ＋发泡助剂，硫化体系为硫黄＋促进剂ＤＭ／ＴＭＴＤ／Ｄ，补强填充剂为白炭黑，防老剂体系为防老剂ＭＢ／ＲＤ／石蜡并用。生产工艺：将胶料在平板硫化机上模压硫化（１６３℃×４６０ｓ）成海绵胶管后，用外圆磨床研磨胶管，再用车床（微机控制）切割胶管成轮。产品耐色带油墨和压缩永久变形两个关键指标优于日本件，装机强化试验运行４５３ｈ（远远超过技术指标）。     

超高压输电线路间隔棒橡胶阻尼件

本发明属于超高压输电线路间隔棒橡胶阻尼件的制备方法。以乙丙橡胶、丁基橡胶为主要原料,塑炼达到要求可塑度后,依次加入硫化活性剂、硫化促进剂、防老剂、补强填充剂、增塑剂、硫化剂,继续混炼均匀,薄通下片,制备的超高压输电线路间隔棒橡胶阻尼件,阻尼性能好,防震;力学性能优良,耐磨,使用寿命长达20-25年;     

铁道货车JC型双作用弹性旁承疲劳性能的研究

研究了铁道货车以天然橡胶为主体材料的JC型双作用弹性旁承疲劳性能。结果表明,配方设计时硫化体体系宜采用硫黄硫化体系,补强填充剂选用半补强炭黑,软化增塑剂选用邻苯二甲酸二辛酯,防老剂选用防老剂4010NA与防老剂BLE并用。生产过程中,要控制塑炼、混炼的工艺参数,铁件要采用磷化或喷砂处理,选、配合适的胶浆,涂刷均匀,干燥后使用,硫化采取低温长时间硫化工艺。外观形状,尤其是圆弧面过渡要圆滑自然,外观表面不应有丝毫的损伤和缺陷。     

丙烯酸酯橡胶的配合

介绍了国内丙烯酸酯橡胶的生产和应用状况,对应用中常见的配合技术问题进行了分析探讨,提出了相应的措施和方法,即严格控制生胶质量,选择中性或偏碱性补强填充剂,采用皂／硫黄并用,N,N′－二（亚肉桂基－1,6－己二胺）硫化体系或硫化剂TCY作为硫化体系,并注意选择适当的防老剂,加工助剂和功能性助剂以提高胶料的耐热老化性和加工性能。     

氯醚橡胶加工技术(4)

3.2 补强填充剂 补强填充剂对氯醚橡胶的补强效果与其在二烯类橡胶中的情况大致相同。在补强填充剂中,炭黑的补强效果最好,其次是白炭黑和碳酸钙等。 炭黑种类不同,其补强效果也不同(见图3—3、3—4),粒径小的补强效果大。玻璃化温度低的氯醚橡胶用粒径大的炭黑补强时,硫化胶拉伸强度达到最大值时的炭黑用量多,这与二烯类橡胶相同。对于均聚氯醚橡胶,炭黑用量少一些(20～30份)就可使拉伸强度达到最大值;而对于共聚氯醚橡胶,拉伸强度达到最大值时炭黑用量相对要多一些。炭黑粒径和用量对氯醚橡胶拉伸强度表现的这一趋势,相必对于添加增塑剂胶料,均聚氯醚橡胶与共聚氯醚橡胶并用胶料、不同环氧乙烷聚合比胶种当该也是如此,因此应根据     

我国橡胶助剂技术进展

简要介绍了我国橡胶助剂新品种,如抗硫化返原剂、高热稳定性不溶性硫黄、新型增粘树脂、补强树脂、分散剂等。指出了我国橡胶助剂技术发展动向,加快加工操作体系助剂新品种的产业化步伐,开发系列化产品。防老剂和促进剂继续加快生产技术进步,开发安全高效的新品种。     

Reduction of offensive odor from natural rubber by odor‐reducing substances

A number of chemicals including carbon black, chitosan, benzalkonium chloride, sodium dodecyl sulfate, cyclodextrin, and zeolite13x were tested as odor‐reducing fillers. The rationale is based on the concept of using odor absorbents/adsorbents for which both physical adsorption and chemical adsorption play an important role in odor reduction. The fillers were incorporated into highly odorous natural rubber (STR20 and RSS5) by physical mixing prior to sulfur vulcanization. As identified by gas chromatography and gas chromatography/mass spectrometry, the unpleasant odor mainly originates from low molecular weight volatile fatty acids. The quantity of acetic acid, a representative of odor molecule, can be significantly reduced in the presence of chitosan and zeolite13x. Although carbon black and cyclodextrin exhibited a tendency to reduce the odor, they were not as effective as zeolite13x and chitosan. On the other hand, commercial surfactants such as benzalkonium chloride and sodium dodecyl sulfate cannot serve as odor‐reducing substances because of their limited thermal stability. An olfactometry test confirmed that chitosan and carbon black are good odor‐reducing agents. Chitosan and carbon black showed a reinforcing effect on vulcanized rubber, whereas the surfactant deteriorated the strength of the rubber composite. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 2253–2260, 2004     

Vulcanization kinetics of nano-silica filled styrene butadiene rubber

It was shown that the physical filler-polymer and filler–filler interactions, apart from the filler surface chemistry, has a substantial role in controlling the vulcanization kinetics of styrene butadiene rubber filled with nano-silica in a sulfur vulcanization system. Kinetic studies by the oscillating disc rheometer, differential scanning calorimeter, and swelling tests revealed that the vulcanization rate goes through a maximum as loading of silica increases, but conversion in crosslinking continuously decreases as the amount of silica increases. The effect of silica loadings on the vulcanization reactions was linked to the immobilization of rubber chains around particles as well as in a polymer-mediated filler network, which were differentiated by the nonlinear viscoelastic behavior of rubber vulcanizates. By surface modification of nano-silica, the accelerating/decelerating effects of nano-silica on the vulcanization reactions were altered corresponding to the non-linear viscoelastic behavior of the vulcanizates. Therefore, a mechanism was proposed which correlates vulcanization kinetics of rubber to the dynamics of chains influenced by the reinforcing fillers.     

Effect of bis(diisopropyl)thiophosphoryl disulfide on the covulcanization of styrene–butadiene rubber and ethylene–propylene–diene (monomer) blends

Covulcanization of elastomer blends constituting styrene–butadiene rubber (SBR) and ethylene–propylene–diene (monomer) rubber (EPDM) was successfully performed in the presence of reinforcing fillers like carbon black and silica by using a multifunctional rubber additive, bis(diisopropyl)thiophosphoryl disulfide (DIPDIS). The polarity of EPDM rubber was increased by a two‐stage vulcanization technique, which allowed the formation of rubber‐bound intermediates. In this way the migration of both curatives and reinforcing fillers in the EPDM–SBR blend could be controlled and cure rate mismatch could be minimized. The process significantly improved the physical properties of the blend vulcanizates. The phase morphology, as evident from the SEM micrographs, was indicative of the presence of a much more compact and coherent rubber matrix in the two‐stage vulcanizates. Different accelerator systems were studied to understand better the function and effectiveness of DIPDIS in developing homogeneity in the blends of dissimilar elastomers. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1231–1242, 2004     

炭黑/白炭黑双相填料补强BIIR/PP热塑性弹性体的性能研究

通过动态硫化工艺制备了溴化丁基橡胶（BIIR）/聚丙烯（PP）热塑性弹性体,研究了加工时间、填料、硫化剂对弹性体力学性能的影响。结果表明,动态硫化制备热塑性弹性体的时间约为13 min;使用炭黑N330/白炭黑双相填料的热塑性弹性体具有较好的力学性能;在氧化锌、硫磺、溴化辛基酚醛树脂及硫磺/溴化辛基酚醛树脂并用硫化体系中,溴化辛基酚醛树脂硫化的热塑性弹性体力学性能最佳。     

白炭黑在合成橡胶中的应用研究进展

介绍白炭黑在合成橡胶单一胶种体系和并用胶体系中的应用,以及白炭黑与其他填料或补强剂并用在合成橡胶中的应用研究进展。指出今后应该进一步加强白炭黑补强机理及其影响因素的理论研究,降低生产成本,扩大应用范围;重点加强白炭黑与其他补强剂并用对合成橡胶性能影响的应用研究。     

滑石—硅灰石复合矿物填充剂应用于硅橡胶

硅灰石等天然矿物通过超细粉碎和表面改性制成了性能较好的硅橡胶补强填充剂,探讨了没的粒长、偶联剂以及复合填充剂地硅橡胶力学性能的影响,制成的硅橡胶补强填充剂可部分取代白炭黑。     

Vulcanization accelerator functionalized nanosilica: Effect on the reinforcement behavior of SSBR/BR

The application of nanosilica in high performance tire highly depends on its uniform dispersion in rubber matrix. A series of dispersible nanosilica (denoted as DNS) modified by diphenyl guanidine (denoted as DPG, a vulcanization accelerator) were synthesized by liquid phase in situ surface chemical modification. The structure of the as‐obtained DNS‐DPG fillers was investigated in relation to Fourier transform infrared spectrometric analysis, thermogravimetric analysis, dynamic light scattering test, and transmission electron microscopic observation. It was found that the rubber vulcanization accelerator DPG was successfully grafted onto the surface of nanosilica, thereby effectively preventing the silica nanoparticles from agglomeration and significantly reducing the average particle size. The reinforcing effect of the DPG‐modified DNS nano‐fillers for the solution polymerized styrene butadiene rubber/butadiene rubber (denoted as SSBR/BR) was dependent on the fraction of the modifier DPG; in particular, when the amount of modifier DPG is 135.25 mmol/kg (denoted as DNS‐DPG‐3), silica exhibited very homogeneous dispersion in the SSBR/BR matrix, which contributed to significantly enhancing the filler‐rubber compatibility. As a result, SSBR/BR/DNS‐DPG‐3 nanocomposite exhibited the best mechanical properties, integrated high abrasion resistance and low rolling resistance. The modified silica not only possessed the effect of accelerating the crosslinking reaction, but also showed the reinforcing effect. This could make it feasible for SSBR/BR/DNS‐DPG nanocomposite to find promising application in green tire tread. POLYM. ENG. SCI., 59:1270–1278 2019. © 2019 Society of Plastics Engineers     

粉状填充剂对橡胶复合材料拉断伸长率的影响

以不同粒径的氢氧化镁、轻质碳酸钙和炭黑N110填充SBR、EPDM、NBR和硅橡胶，探讨粉状填充剂（简称粉体）对其填充橡胶复合材料拉断伸长率的影响。结果表明，粉体的表面活性、粒径、分散性、用量以及基体橡胶的拉伸强度和拉断伸长率等因素对橡胶复合材料拉断伸长率的影响存在着竞争关系。粉体的粒径和基体橡胶的交联密度影响橡胶复合材料拉断伸长率随粉体用量增大而提高的幅度。粉体对基体橡胶表现出较强的补强作用时，使橡胶复合材料的拉断伸长率出现峰值的粉体用量较小。与传统观点不同，试验得出大多数情况下填充粉体有利于橡胶复合材料拉断伸长率提高的结论。     

配合体系对丁腈橡胶胶料性能的影响

研究生胶体系、防护体系、增塑体系、硫化体系对丁腈橡胶（NBR）硫化胶性能的影响。结果表明,当单独采用丙烯腈含量为29%的NBR2707或NBR N640时,NBR硫化胶的耐油性能优异,但耐低温性能较差;适宜的防护体系可以在不影响NBR硫化胶的力学性能的前提下,提高其耐油性能和抗压缩永久变形性能;采用增塑剂DOS/TP-95体系的NBR硫化胶的力学性能和耐油性能优于单独采用增塑剂DOS或TP-95的NBR硫化胶;采用过氧化物DCP/甲基丙烯酸镁和过氧化物BIPB/硫黄给予体硫化体系的NBR硫化胶的综合性能优异。     

天然橡胶发泡胶球的研制

用天然橡胶制备彩色发泡胶球,研究了发泡剂及发泡助剂、硫化体系、填充体系、混炼和硫化工艺以及发泡工艺等对发泡胶球品质的影响。结果表明,发泡剂选用二亚硝基五亚甲基四胺与小苏打和尿素脂BK并用体系可使胶球的泡孔细密均匀,气味很小;硫化体系采用临界温度较低的促进剂TT、CZ及M与硫黄并用能使硫化程度与发泡速率很好地匹配;选择轻质碳酸钙和滑石粉作为填充体系、使用门尼黏度为20～40的胶料及采用二段硫化工艺时所制备发泡胶球的泡孔细密、结构理想,发泡倍率与国外胶乳发泡制品相当。