改性高岭土纳米管对天然橡胶/氯丁橡胶/氯化丁基橡胶并用胶性能的影响

Effect of Modified Kaolin Nanotubes on Properties of NR/CR/CIIR Blends

采用异丙基三油酸酰氧基钛酸酯(偶联剂HY-105)对高岭土纳米管表面改性,制备改性高岭土纳米管,并用其补强天然橡胶/氯丁橡胶/氯化丁基橡胶并用胶,研究改性高岭土纳米管对并用胶性能的影响。结果表明:与添加高岭土纳米管的并用胶相比,添加改性高岭土纳米管的并用胶的储能模量(G′)增大,ΔG′减小,Payne效应减弱,填料在橡胶基体中的分散性改善,并用胶的F_(max)-F_(L)明显增大,物理性能明显提高;随着改性高岭土纳米管用量的增大,并用胶的t10和t90均延长,加工安全性改善,F_(L),F_(max)和F_(max)-F_(L)均增大,拉伸强度、拉断伸长率和撕裂强度均先提高后降低;当改性高岭土纳米管用量为10份时,并用胶的物理性能最佳。

The modified kaolin nanotubes were prepared by using isopropyl trioleic acid acyloxy titanate(coupling agent HY-105),and natural rubber(NR)/chloroprene rubber(CR)/chlorinated butadiene rubber(CIIR)blends were reinforced by the modified kaolin nanotubes.The effect of the modified kaolin nanotubes on the properties of the blends was studied.The results showed that,compared with the blends reinforced with unmodified kaolin nanotubes,the storage modulus(G′)of the blends reinforced with modified kaolin nanotubes increased,theΔG′decreased,the Payne effect was weakened,the dispersion of filler was improved,and the F_(max)-F_(L) and physical properties of the blends were significantly improved.With the increase of the amount of modified kaolin nanotubes,the t10 and t90 of the blends were extended,the processing safety was improved,the F_(L),F_(max) and F_(max)-F_(L) increased,while the tensile strength,elongation at break and tear strength increased first and then decreased.When the amount of the modified kaolin nanotubes was 10 phr,the physical properties of the blends were the best.