35220082WorldRubberIndustryVol.35No.2:1~3Feb.2008 /()/黄茂芳, 李普旺, 高天明, 吕明哲(中国热带农业科学院农产品加工研究所,广东湛江524001) : 以新鲜胶乳为主体材料,有机改性蒙脱土为填料,用凝聚共沉法制备了蒙脱土/天然橡胶复合材料,研究了复合材料的物理性能、动态力学性能及其热稳定性。结果表明,在天然橡胶中加入少量(3%~5%)的纳米蒙脱土,可以使橡胶的定伸应力、拉伸强度等性能大幅度提高,动态力学性能和耐热稳定性得到明显改善。: 新鲜胶乳;有机改性蒙脱土;凝聚共沉法;复合材料 :TQ331.2 :B :1671-8232(2008)02-0001-030 前 言1~100nm。,,。。()()。,,。,,。,[1-4]。,、、、、。(3%~5%),、,,,[5]。。,/NR,,。1 实 验1.1 ,25%,;,,3.8nm;。1.2 NR100,5.0,2.0,M1.5,1.0,2.5,TMTD0.2,。1.3 3365,INSTRON;DMA2000,NETZSCH;STA449C,NETZSCH。1.4 ,,,、、。,10,。24h,25T,140℃×t90。1.5 (1)GB/T528-1998,;GB/T529-1999,,500mm/min;AGB/T531-1999。(2)NETZSCHDMA242,,5℃/min,1.0Hz,-120℃10℃,、。(3)5mgSTA449C,,50mL/min,10℃/min30℃600℃,(TG)(DTG)。2 结果与讨论2.1 1,DK-42#、300%、500%1#,。。1 NR1#2#A/3449300%/MPa1.514.39500%/MPa4.1416.05/MPa16.027.54/%710662/N·mm-123342.2 11#2#10℃/min(TG)(DTG)。,,TG,。DTG350~400℃。,。2,1#2#349.5℃355.8℃,2#1#6.3℃。。,,。1 TGDTG(———1# ---2#)2 TGA/℃ToTpTf1#349.5386.9429.422#355.8389.7440.82.3 2.3.1 21#2#(tanδ)DMA。,。,(),,,;(),,,;,,,,·2· 2008 。1Hz,1#2#()-52.4℃-56.9℃。,,,,,。,,。2 (———1# ---2#)2.3.2 31#2#(E′)。,,E′。,2#E′1#E′。,,,,,E′E′,,E′。,,,,E′。3 (———1# ---2#)3 结 论(3%~5%),、、,。:[1] ,,./[J].,1998,19(2):8-9.[2] ,, ./SBR[J].,2004,51(9):524-526.[3] , ,./:[J].,2002,12(4):20-23.[4] P.Bala,B.K.Samantaray,S.K.Srivastava,G.B.Nando.Organomodifiedmontmorilloniteasfillerinnaturalandsyntheticrubber[J].JournalofAp-pliedPolymerScience,2004,92:3583-3592.[5] M.Arroyo,M.A.Lopez-Manchado,B.Herrero.Organo-montmorilloniteassubstituteofcarbonblackinnaturalrubbercompounds[J].Polymer,2003,44:2447-2453.[: ]:2006-12-06Preparationandpropertiesofmodifiedmontmorillonite/NRnanocompositesHUANGMao-fang, LIPu-wang, GAOTian-ming, LVMing-zhe(AgriculturalProductsProcessingResearchInstitute,ChineseAcademyofTropicalAgriculturalSciences,Zhanjiang524001,China)Abstract:Modifiedmontmorillonitenanocompositeswerepreparedbycoacervation-coprecipitationoffreshnaturallatexwithorgan-modifiedmontmorillonite.Thephysicalproperty,dynamicmechanicalproperty,andthermostabilityofnano-compositeswerestudied.Theresultsshowthattheobtainednanocompositespossessexcellentphysicalpropertiesandbetterdynamicpropertiesandthermalstability.Keywords:freshlatex;organmodifiedmontmorillonite;coacervation-coprecipitation;composite·3· 352,./……