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Preparation of Modified Mg-Al Layered Double Hydroxide and Its Flame-retardant Application in PA6 Composites

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年02期
Page:
272-276
Research Field:
Publishing date:

Info

Title:
Preparation of Modified Mg-Al Layered Double Hydroxide and Its Flame-retardant Application in PA6 Composites
Author(s):
JIANG Wen-junXU JianZHAO Chun-baoYANG Xu-jiePU Long-juanXIONG Li-yuan
School of Chemical Engineering,NUST,Nanjing 210094,China
Keywords:
modified Mg-Al layered double hydroxide composites flame retardant synergism preparation characterization
PACS:
TB332
DOI:
-
Abstract:
The modified Mg-Al layered double hydroxide(LDH) is synthesized by coprecipitation method using Al(NO3)3·9H2O,Mg(NO3)2·6H2O,C18H35O2Na and NaOH as raw materials.The structure and the thermal stability of products are characterized by FTIR,XRD and TG-DTA.The results show that when the mole ratio between C18H35O2Na and Al(NO3)3·9H2O is 1,the quantity of C18H35O-2 in the interlayer of LDH almost gets the maximum.Compared with the LDH-NO-3,the interlayer spacing of LDH is increased from 0.80 nm to 2.98 nm.The LDH modified with C18H35O2Na has a good thermal stability.PA6/LDH,PA6/MRP and PA6/MRP/LDH composites are prepared by melt extrusion.The composites are characterized by LOI and UL-94 vertical burning.The results show that there is a good flame retardant synergism between LDH and MRP in PA6 composites.When 8 phr LDH and 12 phr microencapsulated red phosphorus(MRP) are added,the oxygen index of the composites is 28.5% and the vertical firing rankes V-0.

References:

[ 1] M iya ta S, Kum ara T H atto riH, e t a.l C ata ly tic activ-i ty o f layered doub le hydrox ides or hydro ta lc ite-type anion ic c lay s [ J]. N ippon Kagaku Zassh,i 1971, 92: 514- 517.
[ 2] H sueh H B, Chen C Y. Preparation and properties o f LDH s /po ly im ide nanocom posites[ J]. Po lym er, 2003, 44( 4) : 1151- 1161.
[ 3] Costa F R, W ag enknecht U, H e inrich G. LDPE /M g- A l layered double hydrox ide nano-com posite: The rm al and flamm ability properties[ J]. Polym er Degradation and S tab ility, 2007, 92( 10): 1813- 1823.
[ 4] Du L C, Qu B J, Xu Z J. Flamm ability character istics and synerg istic effec t o f hydro talc ite w ith m icroencapsu lated red pho spho rus in ha logen-free flame retardant EVA com posite[ J]. Po lym er Deg radation and Stabil-i ty, 2006, 91( 5): 995- 1001.
[ 5] Costa F R, Abde-l GoadM, W agenknecht U, et a.l Nanocomposites based on po lyethy lene andMg-Al layered doub le hydrox ide. I. Syn thesis and character ization[ J]. Po lym er, 2005, 46( 12): 4447- 4453.
[ 6] 苟国敬. 镁铝层状复合氢氧化物微晶的合成与应用基础研究[ D ]. 北京: 中国科学院研究生院, 2005. 35- 51.
[ 7] 汪信, 郝青丽, 张莉莉. 软化学方法导论[M ] . 北京: 科学出版社, 2007. 66- 68.
[ 8] Yang Q Z, Sun D J, Zhang C G, et a.l Synthesis and cha racte rization o f po lyoxyethylene su lfate inte rca la ted M g-A-lN itrate lay ered doub le hydrox ide [ J ]. Langmu ir, 2003, 19( 14) : 5570- 5574.
[ 9] T ian Y, W ang G, Li F, et a.l Synthes is and therm ooptica l stability o f o-m e thy l red- intercalated N-i Fe layered doub le hydrox idem ate rial[ J]. M ate rials Letters, 2007, 61( 8- 9): 1662- 1666.
[ 10] 谢晖, 矫庆泽, 段雪. 镁铝型水滑石水热合成[ J]. 应用化学, 2001, 18( 1): 70- 72.
[ 11] Bahranow sk ia K, Bueno G, Cortes C V, e t a.l Ox idative dehydrogena tion o f propane over calc ined vanada te-ex changedM g, A -l laye red doub le hydrox ides[ J]. Applied Ca talysis A: Gene ra,l 1999, 185 ( 1 ): 65 - 73.
[ 12] Costa F R, Leuter itz A, W agenknecht U, e t a.l Interca lation o fMg-A l layered double hydrox ide by an ionic surfactants: Preparation and charac terization [ J]. Applied C lay Sc ience, 2008, 38( 3- 4) : 153- 164.
[ 13] Park A Y, Kw on H, W oo A J, et a .l Layered double hydrox ide surface m odified w ith ( 3- am inopropy l) triethoxys ilane by cova lent bond ing[ J]. AdvancedM ater-i a ls, 2005, 17: 106- 109.
[ 14] 张杰, 李殿卿, 任玲玲, 等. 新原料路线共沉淀法组装超分子结构柠檬酸根插层水滑石[ J]. 无机化学学报, 2004, 20( 10): 1208- 1212.
[ 15] Bone J S. Deve lopm ent and Character iza tion o f the Inte rlaye r Chem istry o f Laye red Doub le H ydrox ides[ D]. Ex ter: University of Ex ter, 1995.
[ 16] 赵芸, 李峰, EVNAS D G, 等. 纳米LDH 对环氧树脂燃烧的抑烟作用[ J] . 应用化学, 2002, 19( 10): 954 - 957.

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Last Update: 2012-11-19