PMI泡沫发泡剂甲酰胺的分解行为
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  • 英文篇名:Decomposition Behavior of Formamide during PMI Forming
  • 作者:吴辉剑 ; 杜作娟 ; 黄小忠 ; 王春齐 ; 黄祺
  • 英文作者:Wu Huijian;Du Zuojuan;Huang Xiaozhong;Wang Chunqi;Huang Qi;School of Aeronautics and Astronautics,Central South University;The 9th Department of the 4th Research Academy of CASIC;
  • 关键词:聚甲基丙烯酰亚胺泡沫 ; 甲酰胺 ; 热重红外联用
  • 英文关键词:polymethacrylimide foam;;formamide;;TG–FTIR
  • 中文刊名:ACSN
  • 英文刊名:Engineering Plastics Application
  • 机构:中南大学航空航天学院;航天科工集团四院九部;
  • 出版日期:2018-06-10
  • 出版单位:工程塑料应用
  • 年:2018
  • 期:v.46;No.344
  • 基金:国防科技创新项目(17-H863-02-ZD-001-003-02);; 国防预研项目(41422020404)
  • 语种:中文;
  • 页:ACSN201806040
  • 页数:5
  • CN:06
  • ISSN:37-1111/TQ
  • 分类号:124-128
摘要
为研究聚甲基丙烯酰亚胺(PMI)发泡剂甲酰胺在高温发泡时的分解行为,提出了PMI发泡剂甲酰胺在高温发泡时可能存在的分解方式,并通过对比甲酰胺和甲酰胺水溶液的回流冷凝实验,以及分析未加发泡剂与加甲酰胺的PMI预聚体高温释放的气体的热重红外分析结果确定了甲酰胺的分解方式。发泡期间,甲酰胺在220℃分解出HCN,H_2,CO_2和NH_3,与此同时,在此温度下PMI预聚体环化生成H_2O,降低了甲酰胺的分解速率。除此之外,通过比较甲酰胺与物理发泡剂叔丁醇的发泡倍率,得出在PMI泡沫密度为80,72,60 kg/m~3时叔丁醇所需物质的量分别为甲酰胺的1.79,1.46,1.28倍。实验表明在PMI发泡时甲酰胺同时具有化学发泡剂和物理发泡剂的特点,随着甲酰胺含量的升高,其分解率逐渐变低。
        The possible decomposition modes of polymethacrylimide(PMI) foaming agent formamide were presented. Also,the correct mode was confirmed by comparing reflux condensation experiments of formamide and formamide aqueous solution and comparing thermogravimetric infrared analyses of gases released in high temperature by PMI prepolymer which added and not added formamide. During the period of foaming,the formamide decomposed HCN,H_2,CO_2 and NH_3 at 220℃. Also,at that temperature,the PMI prepolymer cyclization generated H_2O,which can reduce the decomposition rate of formamide. In addition,the comparison of foaming ratio between formamide and a physical foaming agent,tert-butyl alcohol indicates that the required amount of substance of tert-butyl alcohol were 1.79,1.46,and 1.28 times that of formamide,when the PMI foam density is 80,72 kg/m~3,and 60 kg/m~3 respectively. It can be concluded by experiments that the formamide has the characteristics of chemical and physical foaming agent at the same time during the PMI foaming,and with the increasing content of formamide,the decomposition rate gradually decreases.
引文
[1]Yang F P,Lin Q Y,Jiang J J.Experimental study on fatigue failure and damage of sandwich structure with PMI foam core[J].Fatigue&Fracture of Engineering Materials&Structures,2015,38(4):456–465.
    [2]John M,Skala T,Wagner T,et al.Dimensional changes in CFRP/PMI foam core sandwich structures[J].Applied Composite Materials,2013,20(4):601–614.
    [3]徐荣章,关志东,王仁宇,等.不同工艺成型复合材料加筋板轴压破坏机理分析[J].北京航空航天大学学报,2016,42(5):1 032–1 038.Xu Rongzhang,Guan Zhidong,Wang Renyu,et al.Failure mechanism analysis of different types of manufacture for composite stiffened panels under axial compression load[J].Journal of Beijing University of Aeronautics and Astronautics,2016,42(5):1 032–1 038.
    [4]周景隆,李文晓,薛鹏.微孔结构对PMI泡沫准静态压缩性能的影响[J].材料导报,2017,31(20):147–151.Zhou Jinglong,Li Wenxiao,Xue Peng.The effects of microcell structure on quasi-static compression performance of PMI foam[J].Materials Review,2017,31(20):147–151.
    [5]张乐,张广成,米星宇,等.高密度PMI泡沫塑料的制备、结构与性能研究[J].宇航材料工艺,2012,42(6):60–64.Zhang Le,Zhang Guangcheng,Mi Xingyu,et al.Preparation,structure and properties of high density PMI foam[J].Aerospace Materials&Technology,2012,42(6):60–64.
    [6]曲春艳,焦自保.单体配比对PMI泡沫塑料结构和性能的影响[J].化学与粘合,2011,33(5):25–28.Qu Chunyan,Jiao Zibao.Effect of monomer ratio on structure and properties of PMI foams[J].Chemistry and Adhesion,2011,33(5):25–28.
    [7]刘铁民,张广成,梁国正,等.光引发聚合在高性能MAA/AN/AM共聚物泡沫塑料制备过程中的应用[J].西安石油大学学报:自然科学版,2007,22(1):95–99.Liu Tiemin,Zhang Guangcheng,Liang Guozheng,et al.Application of photoinitiation copolymerization in the preparation of high-performance MAA/AN/AM copolymer foam plastic[J].Journal of Xi’an Shiyou University:Natural Science Edition,2007,22(1):95–99.
    [8]曲春艳,谢克磊,马瑛剑,等.聚甲基丙烯酰亚胺(PMI)泡沫塑料的制备与表征[J].材料工程,2008(11):19–23.Qu Chunyan,Xie Kelei,Ma Yingjian,et al.Preparation and characterization of polymethacrylimide foams[J].Foam Material Engineering,2008(11):19–23.
    [9]谢克磊,曲春艳,马瑛剑,等.交联剂对PMI泡沫塑料结构与性能的影响[J].材料工程,2009(4):23–27.Xie Kelei,Qu Chunyan,Ma Yingjian,et al.Effect of cross-linking agent to the structure and properties of PMI foams[J].Materials Engineering,2009(4):23–27.
    [10]燕子,张广成,马科峰,等.碳纳米管填充PMI泡沫的制备及其吸波性能研究[J].应用化工,2012,41(5):844–847.Yan Zi,Zhang Guangcheng,Ma Kefeng,et al.Preparation and wave-absorbing of carbon nanotubes filled PMI foam[J].Applied Chemistry,2012,41(5):844–847.
    [11]陈小强,张曼,雷毅.PMI泡沫发泡过程中的分子结构转变[J].宇航材料工艺,2011,41(5):32–36.Chen Xiaoqiang,Zhang Man,Lei Yi.Transformation of molecular structure during foaming of PMI foam[J].Aerospace Materials&Technology,2011,41(5):32–36.
    [12]陈小强,张曼,雷毅.聚甲基丙烯酰亚胺泡沫的制备及其压缩性能[J].塑料工业,2011,39(6):60–63.Chen Xiaoqiang,Zhang Man,Lei Yi.Preparation and compression properties of PMI foam[J].China Plastics Industry,2011,39(6):60–63.
    [13]刘燕青,黄安民,刘婷,等.聚甲基丙烯酰亚胺泡沫塑料的制备及研究现状[J].塑料科技,2012,40(6):86–90.Liu Yanqing,Huang Anmin,Liu Ting,et al.Research situation of polymethacrylimide foam plastics and its preparation[J].Plastics Science and Technology,2012,40(6):86–90.
    [14]Franco C,Giacomo P,Giuseppe C.Synthesis of HCN polymer from thermal decomposition of formamide[J].Journal of Macromolecular Science Part A,2009,46(11):1 039–1 048.
    [15]Nouira I,Kostakis I K,Dubouilh C,et al.Decomposition of formamide assisted by microwaves,a tool for synthesis of nitrogen-containing heterocycles[J].Cheminform,2009,40(10):7 033–7 036.
    [16]Nguyen V S,Orlando T M,Leszczynski J,et al.Theoretical study of the decomposition of formamide in the presence of water molecules[J].Journal of Physical Chemistry A,2013,117(12):2 543–2 555.

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