白炭黑/纳米甲壳素/多层石墨烯对溶聚丁苯橡胶/顺丁橡胶并用胶性能的影响
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摘要
将白炭黑、纳米甲壳素与多层石墨烯三者并用填充溶聚丁苯橡胶(SSBR)/顺丁橡胶(BR)并用胶,考察了多层石墨烯用量对并用胶硫化特性、物理机械性能、耐老化性能及Payne效应的影响。结果表明,加入多层石墨烯后,SSBR/BR混炼胶的焦烧时间及正硫化时间明显缩短,硫化速率加快,加工性能得到改善;随着多层石墨烯用量的增加,SSBR/BR硫化胶的拉伸强度略提高后降低,100%定伸应力及300%定伸应力逐渐降低,扯断伸长率增大,撕裂强度及邵尔A硬度变化不大;经热空气老化后,SSBR/BR硫化胶的拉伸强度变化率明显降低,综合考虑,多层石墨烯最佳用量为1.0份;随着多层石墨烯用量的增加,SSBR/BR混炼胶的Payne效应逐渐下降,而硫化胶的Payne效应变化不大。
Solution-polymerized styrene-butadiene rubber( SSBR)/cis-1,4-butadiene rubber( BR)blends were filled with silica/nano chitin/multilayer graphene,and the effects of amount of multilayer graphene on curing characteristics,mechanical properties,aging resistance and Payne effect of the blends were investigated. The results showed that the multilayer graphene could shorten the scorch time and curing time,accelerate the rate of vulcanization,and improve processability of SSBR/BR compounds. With increasing amount of multilayer graphene,the tensile strength of the vulcanizates slightly increased first and then decreased,modulus at 100% and modulus at 300% decreased, elongation at break increased,while tear strength and Shore A hardness had little change. After hot air aging,the change of tensile strength decreased significantly. Based on the overall balance, the suitable of multilayer graphene was 1. 0 phr. With the increase of amount of multilayer graphene,the Payne effect of SSBR/BR compounds decreased,while the Payne effect of the vulcanizates had little change.
Solution-polymerized styrene-butadiene rubber( SSBR)/cis-1,4-butadiene rubber( BR)blends were filled with silica/nano chitin/multilayer graphene,and the effects of amount of multilayer graphene on curing characteristics,mechanical properties,aging resistance and Payne effect of the blends were investigated. The results showed that the multilayer graphene could shorten the scorch time and curing time,accelerate the rate of vulcanization,and improve processability of SSBR/BR compounds. With increasing amount of multilayer graphene,the tensile strength of the vulcanizates slightly increased first and then decreased,modulus at 100% and modulus at 300% decreased, elongation at break increased,while tear strength and Shore A hardness had little change. After hot air aging,the change of tensile strength decreased significantly. Based on the overall balance, the suitable of multilayer graphene was 1. 0 phr. With the increase of amount of multilayer graphene,the Payne effect of SSBR/BR compounds decreased,while the Payne effect of the vulcanizates had little change.
引文
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[14]Payne A R.Effect of dispersion on dynamic properties of filler-loaded rubbers[J].Rubber Chemistry and Technology,1966,39(2):365-374.
[2]Nair K G,Dufresne A.Crab shell chitin whisker reinforced natural rubber nanocomposites(1):Pcrocessing and swelling behavior[J].Biomacromolecules,2003,4(3):657-665.
[3]Nair K G,Dufresne A.Crab shell chitin whisker reinforced natural rubber nanocomposites(2):Mechanical behavior[J].Biomacromolecules,2003,4(3):666-674.
[4]Nair K G,Dufresne A.Crab shell chitin whiskers reinforced natural rubber nanocomposites(3):Effect of chemical modification of chitin whiskers[J].Biomacromolecules,2003,4(6):1835-1842.
[5]Valodkar M,Thakore S I.Biopolymers as effective fillers in natural rubber:Composites versus biocomposites[J].Journal of Applied Polymer Science,2012,124(5):3815-3820.
[6]Visakh P M,Monti M,Puglia D,et al.Mechanical and thermal properties of crab chitin reinforced carboxylated SBR composites[J].Express Polymer Letters,2012,6(5):396-409.
[7]Liu M X,Peng Q,Luo B H,et al.The improvement of mechanical performance and water-response of carboxylated SBRby chitin nanocrystals[J].European Polymer Journal,2015,68:190-206.
[8]欧阳春发,高群,施宇涛,等.壳聚糖增强BR/EPDM共混物初探[J].特种橡胶制品,2012,33(1):18-22.
[9]Park S,Ruoff R S.Chemical methods for the production of graphenes[J].Nature Nanotechnology,2009,4(4):217-224.
[10]Zhang Y B,Tan Y W,Stormer H L,et al.Experimental observation of the quantum hall effect and Berry’s phase in graphene[J].Nature,2005,438:201-204.
[11]Lee C,Wei X,Kysar J W,et al.Measurement of the elastic properties and intrinsic strength of monolayer graphene[J].Science,2008,321(5887):385-388.
[12]殷小波,曹德明.石墨烯对载重轮胎胎面胶性能的影响[J].合成橡胶工业,2014,37(4):312-314.
[13]郭宝春,唐征海,廖瑞娟,等.橡胶/石墨烯复合材料的制备与性能研究[C]∥广东省材料研究学会.广州材料发展论坛---战略性新兴产业发展与新材料科技创新研讨会摘要论文集.广州:广东省工业技术研究院,2013:95-97.
[14]Payne A R.Effect of dispersion on dynamic properties of filler-loaded rubbers[J].Rubber Chemistry and Technology,1966,39(2):365-374.