将一种高效膨胀型无卤阻燃剂季戊四醇二磷酸酯双磷酰蜜胺（SPBDM）和有机改性蒙脱土（OMMT）添加到高分子量聚乳酸（PLA）中，熔融共混制备纳米膨胀型阻燃聚乳酸复合材料（SPBDM-OMMT／PLA）。采用XRD、TEM研究了纳米粒子的形态分布，并用热重分析法（TGA）、氧指数测试（LOI）、垂直燃烧测试（UL-94）探讨了该纳米阻燃SPBDM-OMMT／PLA复合材料的热性能和阻燃性能。研究表明，OMMT在PLA基体中有较好的分散性，高分子链插入层状硅酸盐片层间，形成了剥离型或插层型复合材料；相比纯PLA，加入SPBDM后改善了OMMT／PLA的高温热稳定性，最大热分解温度均向高温移动，且高温残炭质量分数大幅度提高；当SPBDM和OMMT质量分数分别为10．0％和1.0％时，纳米阻燃SPBDM-OMMT／PLA复合材料能达到较好的阻燃效果，LOI数值高达32％，相应垂直燃烧等级达UL-94V-0级。
Intumescently flame retardant polylactide （SPBDM - OMMT/PLA） nanocomposites were prepared by melt-extruding polylactide（PLA）with spirocyclic pentaerythritol bisphosphorate disphosphoryl melamine （SPBDM） and organo-modified montmorillonite （OMMT）. The internal structure of the composites was probed established by XRD and TEM. The SPBDM - OMMT/PLA nanocomposites were also evaluated by thermal gravimetrie analysis （TGA）, limiting oxygen index （LOI） measurements and UL - 94 tests. The results reveal that the uniformly dispersed OMMT clay exfoliates or intercalates in PLA matrix. The thermal stability and char yield of these nanocomposites are greatly enhanced at high temperature, and the maximum degradation temperature increases compared with those of pure PLA. The LOI value of 32% and V -0 level are achieved when 10.0% of SPBDM and 1.0% of OMMT （mass fraction） are added.
参考文献
| [1] | 戈进杰.生物降解高分子材料及其应用[M].北京:化学工业出版社,2002. |
| [2] | Meching S. Nature petrochemistry ? Biologically degradable materials [J]. Angewandte Chemie International Edition, 2004, 43: 1078-1085. |
| [3] | Gupa B, Nilesh R N, Hilborn J. Poly(lactic acid) fiber: An overview [J]. Progress in Polymer Science, 2007, 32(4): 455-482. |
| [4] | Drumright R E, Gruber P R, Henton D. Polylaetie acid technology [J]. Advanced Materials, 2000, 12 (23) : 1841- 1846. |
| [5] | Reti C, Casetta M, Bourbigot S, et aL Flammahil.ity properties of intumescent PLA including starch and lignin [J]. Polymers for Advanced Technologies, 2008, 19 : 628-625. |
| [6] | Reti C, Casetta M, Duquesne S, et al. Intumescent biobased- polylactide films to flame retard nonwovens [J]. Journal of Engineered Fibers and Fabrics, 2009, 4(2): 33-39. |
| [7] | Fontaine G. Bourbigot S. Intumescent polylactide: A nonflammable material [J ]. Journal of Applied Polymer Science, 2009, 113: 3860-3865. |
| [8] | ZhanJ, Song L, Nie S, et ah Combustion properties and thermal degradation behavior of polylactide with an effective intumescent flame retardant [J]. Polymer Degradation and Stability, 2009, 94: 291-296. |
| [9] | Tsunenori Y, Yukihiro K. Flame- ratardant polylactic acid composition: Japan, 161658 [P]. 2009-07-23. |
| [10] | Yohei K. Polylactic acid-based resin composition and modified product made by molding the same: Japan, 150560 [P]. 2008-07-03. |
| [11] | Kenichi K. Flame retardant poly(lactic acid) resin composition and modified article product by molding the same: Japan, 101083 [P]. 2008-05-01. |
| [12] | Kenichi K. Flame-retardant polylactic acid resin composition: Japan, 019294 [P]. 2008-01-31. |
| [13] | Eiichiro K, Hiromichi S. Flame- retardant polylactic acid thermoplastic resin composition and molded article thereof: Japan, 146087 [P]. 2007-06-14. |
| [14] | TakenobuS. JPPatent 193561 [P]. 2006-07-27. |
| [15] | ! Nobuoru I, Katsuichi O, Yoshinori T. Biodegradable flame retardant nonwoven fabric and filter: Japan, 063473 [P]. 2006-03-09. |
| [16] | Hui C. Flame retardant polylactic acid: United States, 0014871 [P]. 2005-01-20. |
| [17] | Reyes J D. Flame retardant wire and cable: Canada, 2630210 [P]. 2008-11-07. |
| [18] | Yamashita T, Kida S, Ishikawa T, et al. Flame retardancy of polylactic acid as a non-petroleum polyester [J]. Kobunshi Ronbunshu, 2006, 63: 577-585. |
| [19] | Lu S Y, Hamerton I. Recent developments in the chemistry of halogen- free flame retardant polymers [J]. Progress in Polymer Science, 2002, 27(8): 1661-1712. |
| [20] | 欧育湘.实用阻燃技术[M].北京:化学工业出版社,2002. |
| [21] | 王建琪.无卤阻燃聚合物基础与应用[M].北京:科学出版社,2005. |
| [22] | Gilman J W. Flammability and thermal stability studies of polymer layered silicate (clay) nanoeomposites [J]. Applied Clay Science, 1999, 15(122): 31-49. |
| [23] | 胡源,宋磊,范维澄.阻燃聚合物/无机物纳米复合材料的若干前沿问题探讨[J].中国科学技术大学学报,2006,36(12):1257-1265. |
| [24] | 陈国栋,肖新颜,程江.新型无卤膨胀型阻燃剂的制备[J].华南理工大学学报:自然科学版,2001,9(5):76-78. |
| [25] | 袁小亚.聚乳酸的阻燃化设计与性能研究[R].成都:四川大学,2009. |
| [26] | 王德义.含磷共聚酯/无机纳米复合材料的制备、性能与阻燃机理研究[D].成都:四川大学,2007. |
| [27] | Paul M A, Alexandre M, Degee P, et al. New nanocomposite materials based on plasticized poly(L- lactide) and organo- modified montmorillonites: Thermal and morphological study [J]. Polymer, 2003, 44: 443-450. |
| [28] | Qin H, Zhang S, Zhao C, et al. Thermal stability and flammability of polypropylene/montmorillonite composites [J].Polymer Degradation and Stability, 2004, 85 (2) : 807- 813. |
| [29] | 庄韦,贾海军,王酷,等.原位聚合法制备纳米凸凹棒土/聚乳酸复合材料[J].复合材料学报,2010,27(4):45-51. |
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