氯化铵用量对酸化蒙脱土改性低摩尔比脲醛胶粘剂性能的影响

详细信息    查看全文 | 推荐本文 |

英文篇名：Effect of the amount of ammonium chloride on the properties of H-MMT modified lowmolar ratio urea-formaldehyde adhesive 作者：赵亚红 ; 于晓芳 英文作者：Zhao Yahong;Yu Xiaofang;Chifeng Industrial Vocational and Technical College;College of Materials Scienceand Art Design,Inner Mongolia Agricultural University; 关键词：酸化蒙脱土 ; 改性 ; 脲醛树脂 ; 氯化铵 英文关键词：acidified montmorillonite;;modification;;UF resin;;ammonium chloride 中文刊名：GXLJ 英文刊名：China Adhesives 机构：赤峰工业职业技术学院;内蒙古农业大学材料科学与艺术设计学院; 出版日期：2019-05-30 出版单位：中国胶粘剂 年：2019 期：v.28 基金：内蒙古自治区自然科学基金项目(2012MS0522);; 内蒙古科技创新引导鼓励基金项目(20140609) 语种：中文; 页：GXLJ201905006 页数：5 CN：05 ISSN：31-1601/TQ 分类号：26-29+35

摘要

为考察氯化铵对蒙脱土改性UF(脲醛树脂)胶粘剂固化性能的影响,先对蒙脱土进行酸化改性,再将一定量的H-MMT(酸化蒙脱土)以原位聚合的方式投入到UF合成的不同阶段,以此制备改性效果不同的UF胶粘剂,并考察氯化铵用量对改性UF胶粘剂固化时间、适用期、胶合强度的影响。研究结果表明:反应第二阶段投入H-MMT改性的UF胶粘剂在3%氯化铵作用下固化性能较好,其固化时间为75.92 s,适用期为325 min,胶合强度为1.09 MPa;H-MMT改性的UF胶粘剂中存在未反应的游离尿素,加入固化剂氯化铵后,体系游离尿素量有所降低。
        In order to investigate the effect of ammonium chloride on the curing properties of UF(ureaformaldehyde) resin adhesives modified by montmorillonite,montmorillonite was first acidified and a certain amount of H-MMT(acidified montmorillonite) was then put into different stages of UF synthesis by in-situ polymerization. UF adhesives with different modification effects were prepared,and the effects of ammonium chloride amount on the curing time,pot life and bonding strength of modified UF adhesives were investigated. The research results showed that the curing performance of UF adhesives modified by H-MMT in the second stage was excellent under the action of 3% ammonium chloride. The curing time was 75.92 s,the pot life was 325 min,and the bonding strength was 1.09 MPa. There existed unreacted free urea in the UF adhesive modified by H-MMT. After adding curing agent ammonium chloride,the amount of free urea in the system decreased.

引文

[1]吴苹,孙旭军.低游离甲醛脲醛树脂胶粘剂的研制[J].应用化工,2002(2):20-21.
    [2]ZHANG J Z,LIU X Y,QIU Y Y,et al.Performances of modified urea-formaldehyde resins for bonding plywood[J].Applied Mechanics and Materials,2011,71-78:3170-3173.
    [3]FERRA J M,MENA P C,MARTINS J,et al.Optimization of the synthesis of urea-formaldehyde resins using response surface methodology[J].Journal of Adhesion Science and Technology,2010,24(8-10):1454-1471.
    [4]CHEN S,LU X,WANG T,et al.Preparation and characterization of urea-formaldehyde resin/reactive kaolinite composites[J].Particuology,2016,24(2):203-209.
    [5]范东斌,李建章,卢振雷,等.不同固化剂下低摩尔比脲醛树脂热行为及胶接胶合板性能[J].中国胶粘剂,2006,15(12):1-5.
    [6]范东斌,李建章.低摩尔比脲醛树脂胶粘剂研究进展[J].中国胶粘剂,2006,15(8):33-36;46.
    [7]徐力峥,李建章,张世锋,等.固化剂对低摩尔比脲醛树脂固化特性的影响[J].北京林业大学学报,2009,31(3):124-128.
    [8]PARK B D,JEONG H W.Effects of acid hydrolysis on microstructure of cured urea-formaldehyde resins using atomic force microscopy[J].Journal of Applied Polymer Science,2011,22(2):3255-3262.
    [9]陈崇英,高金贵,邹志平,等.复合固化剂不同用量对脲醛树脂固化时间及适用期的影响分析[J].木材加工机械,2014,25(1):30-34.
    [10]唐双凌,赵庆,黄红英,等.三聚氰胺草酸盐与氯化铵作为UF固化剂的性能对比[J].中国胶粘剂,2012,21(4):9-12;21.
    [11]赵佳宁,顾继友,郭楠.弱酸性固化剂对UF树脂固化性能的影响分析[J].材料科学与工艺,2013,21(2):131-136.
    [12]刘若工.应用DSC方法对脲醛树脂氯化铵固化剂反应的研究[J].木材工业,1989,3(3):8-13.
    [13]徐力峥,李建章,张世锋,等.固化剂对低摩尔比脲醛树脂固化特性的影响[J].北京林业大学学报,2009,31(3):124-128.
    [14]顾继友,朱莉滨.脲醛树脂化学结构与胶接性能、甲醛释放量及固化特性关系的研究[J].中国胶粘剂,2004,13(3):1-7.
    [15]杜官本.尿素与甲醛加成与缩聚产物13C-NMR研究[J].木材工业,1999,13(4):9-13.
    [16]KIM M G,NO B Y,LEE S M,et al.Examination of selected synthesis and room-temperature storage parameters for wood adhesive-type urea-formaldehyde resins by13C-NMRspectroscopy.V[J].Journal of Applied Polymer Science,2003,89(7):1896-1917.
    [17]于晓芳,王喜明.有机蒙脱土改性脲醛树脂胶黏剂的制备及结构表征[J].高分子学报,2014(9):1286-1291.