本文關(guān)鍵詞： 氧化石墨烯 氧化程度 氫鍵作用 羧基丁腈橡膠 丁苯橡膠　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：氧化石墨烯(GO)因其獨特性質(zhì)和結(jié)構(gòu)成為制備高性能橡膠的潛在填料,但其與非極性橡膠的相互作用差,影響補強效果。本文研究了羧基丁腈橡膠(xNBR)與GO間的相互作用,利用極性xNBR改性GO-丁苯橡膠(SBR)體系,提高GO的補強效果。結(jié)果表明::xNBR與GO之間存在氫鍵作用;xNBR改性后GO能在SBR基體中均勻分散,硫化膠交聯(lián)程度明顯提升。與空白膠相比,填充3 phr改性GO,硫化膠的拉伸強度提升了 359%;填充5phr時,硫化膠的定伸模量(M100、M300)以及撕裂強度分別提升了 149%、356%和310%,材料最大熱分解速率溫度(Tmax)提升了 17.49 ℃,導(dǎo)熱系數(shù)提升了 33%,溶劑吸附常數(shù)(Qe)下降了 18%。而GO的氧化程度對于表面性質(zhì)以及GO-橡膠的相互作用有較大影響,從而影響補強效果。不同氧化程度GO制備及性能研究表明:氧化劑用量增加,填料碳氧比下降,層間距增加,剝離程度增加,熱穩(wěn)定性下降,水溶液中ζ電位下降,穩(wěn)定性增加。不同氧化程度GO對橡膠性能的補強研究表明:xNBR基體中,隨GO氧化程度增加,填料-橡膠界面相互作用更強,分散更均勻。與空白膠相比,填充GOD3(制備氧化劑用量比為3),硫化膠交聯(lián)密度最大,Qe下降8.8%;填充GOD 15(制備氧化劑用量比為15),硫化膠拉伸強度、撕裂強度、Mioo和M300達(dá)到最佳,分別提升115%、88%、111%和 269%;20 ℃/min 下,Tmax提升 8.41 ℃;導(dǎo)熱系數(shù)提升了 33%。xNBR/SBR 共混基體中,填料氧化程度增加,接觸角從98.56 °下降到69.33 °。與空白膠相比,填充GOD 3,硫化膠玻璃化溫度提升了 3.11 ℃。填充GOD 9(制備氧化劑用量比為9),拉伸強度最佳,提升了 192%。填充GOD 15,硫化膠熱穩(wěn)定性最佳,Tmax提升29.42 ℃。
[Abstract]:Graphene oxide (GOO) is a potential filler for the preparation of high performance rubber due to its unique properties and structure, but its interaction with non-polar rubber is poor. The interaction between carboxyl acrylonitrile butadiene rubber (xNBR) and go was studied in this paper. The system of xNBR was modified by polar xNBR. The results showed that there was a hydrogen bond between the ratio of: 1: xNBR and go. Go modified by xNBR can disperse uniformly in SBR matrix, and the crosslinking degree of vulcanizate is improved obviously. Compared with blank rubber, the tensile strength of vulcanizate is increased by 359g when it is filled with 3 phr modified GO3. When filled with 5phr, the modulus of elongation and tear strength of the vulcanizate were increased by 149% and 310%, respectively. The maximum thermal decomposition rate (Tmax) of the material was increased by 17.49 鈩，

本文編號：1458052