通过熔融挤出法制备了纳米有机蒙脱土OMMT／聚酰胺6（PA6）母粒M1和OMMT／聚丙烯（PP）母粒M2，将这两种母粒分别与PA6-PP熔融共混，制备了不同OMMT含量的纳米OMMT／PA6-PP复合材料，同时采用直接共混法制备了相同配比的该纳米复合材料。利用TEM和SEM表征了OMMT在复合材料中的分散、分布和复合材料分散相的形态，并对比了三种工艺制备的复合材料的力学性能。结果表明：三种制备工艺中，OMMT均选择性地分布于PA6相中，且M1母粒法制备的复合体系中OMMT的剥离和分散效果最好。三种工艺制备的复合材料的PP分散相尺寸和多分散系数均随着OMMT含量的增加先急剧减小后变化不大，当C}MMT与PA6-PP的质量比为5：100时，PP分散相的尺寸最小，分布状态最佳。母粒法制备的复合材料中PP分散相尺寸小于直接共混法，分布状态也优于直接共混法。加入OMMT后，三种工艺制备的复合材料的弯曲模量均得到提高，且通过M1母粒法制备的复合材料拉伸强度和弯曲模量最高，通过M2母粒法制备的复合材料冲击韧性最好。
Masterbatch M1 of nano-organ-montmorillonite （OMMT）/polyamide-6（PA6） and masterbatch M2 of OMMT/polypropylene（PP） were prepared by melt-extruding method, and nano-OMMT/PA6 -PP composites with different OMMT content were prepared with two masterbatches by melt-compound blending with PA6 -PP, the composites with the same mass ratio were also prepared by direct blending method. The distribution of OMMT and morphology of the PP disperse phase in composites were characterized by TEM and SEM, and the mechanical properties of nano-OMMT/PA6 -PP composites prepared by three processes were also compared. It was found that the OMMT selectively located in PA6 matrix by three processes, and the OMMT shows the best distribution in the composites prepared by the process of M1 masterbatch. The particle size and polydispersity of the PP disperse phase first reduce and then change little with increasing the OMMT content. When the mass ratio of OMMT to PA6 - PP is 5 ： 100, the particle size is minimized and the distribution shows the best. The composites prepared by the processes of masterbatches display smaller disperse phase size and better distribution than that prepared by direct blending. OMMT improvs the flexural modulus, in which the compsites prepared by the process of M1 masterbatch display the highest tensile strength and flexural modulus, and the ones prepared by the process of M2 masterbatch show the best impact toughness.
参考文献
| [1] | Chow W S, Mohd I Z A, Ishiaku U S, et al. The effect of organoclay on the mechanical properties and morphology of injection-molded polyamide 6/polypropylene nanocomposites [J]. Journal of Applied Polymer Science, 2004, 91(1): 175-189. |
| [2] | Chow W S, Mohd I Z A, Karger-Kocsis J. Atomic force microscopy study on blend morphology and clay dispersion in polyamide-6/polypropylene/organoclay systems [J]. Journal of Polymer Science Part B: Polym Phys, 2005, 43(10): 1198-204. |
| [3] | Zhu Y, Ma H Y, Tong L F, et al. "Cutting effect" of organoclay platelets in compatibilizing immiscible polypropylene/polystyrene blends [J]. Journal of Zhejiang University Science A, 2008, 9(11): 1614-1620. |
| [4] | Ray S S, Okamoto M. Polymer/layered silicate nanocomposites: A review from preparation to processing [J]. Progress in Polymer Science, 2003, 28(11): 1539-1641. |
| [5] | Ray S S, Bousmina M. Compatibilization efficiency of organoclay in an immiscible polycarbonate/poly(methyl methacrylate) blend [J]. Macromolecular Rapid Communications, 2005, 26(6): 1639-1646. |
| [6] | Ray S S, Bousmina M, Maazouz A. Morphology and properties of organoclay modified polycarbonate/poly(methyl methacrylate) blend [J]. Polymer Engineering & Science, 2006, 46(8): 1121-1129. |
| [7] | Kusmono, Ishak Z A M, Chow W S, et al. Influence of SEBS-g-MA on morphology, mechanical, and thermal properties of PA6/PP/organoclay nanocomposites [J]. European Polymer Journal, 2008, 44(4): 1023-1039. |
| [8] | Chow W S, Bakar A A, Ishak Z A M, et al. Effect of maleic anhydride-grafted ethylene-propylene rubber on the mechanical, rheological and morphological properties of organoclay reinforced polyamide 6/polypropylene nanocomposites [J]. European Polymer Journal, 2005, 41(4): 687-696. |
| [9] | Tseng F P, Lin J J, Tseng C R, et al. Poly(oxypropylene)-amide grafted polypropylene as novel compatibilizer for PP and PA6 blends [J]. Polymer, 2001, 42(2): 713-725. |
| [10] | Tang Y, Hu Y, Zhang R, et al. Investigation on polypropylene and polyamide 6 alloys/montmorillonite nanocomposites [J]. Polymer, 2004, 45(15): 5317-5326. |
| [11] | Shim J H, Joo J H, Jung S H, et al. Effect of silane grafted polypropylene on the morphology of polypropylene and nylon 6/clay composites [J]. Journal of Polymer Science, 2007, 45(5): 607-615. |
| [12] | Hassan A, Othman N, Wahit M U, et al. Maleic anhydride polyethylene octene elastomer toughened polyamide 6/polypropylene nanocomposites: Mechanical and morphological properties [J]. Macromolecular Symposia, 2006, 239(1): 182-191.. |
| [13] | Chow W S, Ishak Z A M. Karger-Kocsisb J, et al. Compatibilizing effect of maleated polypropylene on the mechanical properties and morphology of injection molded polyamide 6 /polypropylene/organoclay nanocomposites [J]. Polymer, 2003, 44(24): 7427-7440. |
| [14] | Etel?aho P, Nevalainen K, Suihkonen R, et al. Effects of direct melt compounding and masterbatch dilution on the structure and properties of nanoclay-filled polyolefins [J]. Polymer Engineering & Science, 2009, 49(7): 1438-1446. |
| [15] | 保罗 D R, 巴克纳尔 C B. 聚合物共混物: 组成与性能[M]. 殷敬华, 韩艳春, 安立佳, 等, 译校. 北京: 科学出版社, 2004: 366-368. |
| [16] | Zeng J, Aoyama M, Takahashi H. Effect of the composition on the phase size in immiscible blends with the viscosity ratio close to unity [J]. Journal of Applied Polymer Science, 2003, 89(7): 1791-1799. |
| [17] | 严 伟, 秦舒浩, 于 杰, 等. 有机蒙脱土对ABS-PA6共混物形态结构与力学性能的影响 [J]. 复合材料学报, 2010, 27(1): 37-42. |
| [18] | 邹恩广, 曲佳燕, 王 鉴, 等. 共混条件对功能化聚异丁烯-蒙脱土复合物改性聚丙烯性能的影响 [J]. 复合材料学报, 2009, 26(2): 67-71. |
| [19] | Wang K, Wang C, Li J, et al. Effects of clay on phase morphology and mechanical properties in polyamide 6/EPDM-g-MA/organoclay ternary nanocomposites [J]. Polymer, 2007, 48(7): 2144-2154. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%