摘要
将插层纳米复合技术与IPN技术相结合,通过同步插层聚合法制备了PU/PMMA/MMT纳米复合材料,研究了PU/PMMA的组成、BPO的用量、EGDMA的用量、BD系数等因素对PU/PMMA/MMT纳米复合材料力学性能的影响,获得了PU/PMMA/MMT纳米复合材料的最佳的制备条件为:PU/PMMA的组成为55/45、BPO的用量为0.8%、EGDMA的用量为1.8%、BD系数0.85～0.9.在此条件下制备的PU/PMMA/MMT纳米复合材料的100%定伸应力、拉伸强度、撕裂强度分别为14.76MPa、34.26MPa、80.51kN/m,其力学性能显著优于PU、PU/PMMA和PU/MMT.通过XRD、SEM、TEM等研究表明,PU/PMMA/MMT纳米复合材料中蒙脱土以2～30nm的片层均匀分布于聚合物基体中,形成了插层/剥离型纳米复合材料.
The nano-interplating technique and method of IPN were used together to prepare nanocomposites of PU/PMMA/MMT. The effects of ratio of PU/PMMA,the contents of BPO and EGDMA,coefficients of BDO on mechanical properties were investigated. The optimal conditions can be achieved which show as following: the ratio of PU/PMMA was 55/45,the contents of BPO and EGDMA were 0.8%,1.8% respectively,coefficients of BDO was 0.85～0.9. The mechanical properties (100%modulus,tensile strength,tear strength) of nanocomposite prepared in such conditions were 14.76MPa?34.26MPa?80.51KN/m correspondingly which were obviously better than those of PU,PU/MMT,PU/PMMA,PU/PMMA/NaMMT. Domain structures and morphologies of different composites mentioned former were investigated by XRD,SEM,TEM. The results showed that montmorillonites were evenly dispersed in polymer matrix with sheets of 2～30nm in nanocomposites of PU/PMMA/MMT. So it can be achieved the results that PU/PMMA/MMT were intercalated/exploitated nanocomposites.
出处
《广西大学学报（自然科学版）》
CAS
CSCD
2005年第2期128-134,共7页
Journal of Guangxi University（Natural Science Edition）
