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聚氨酯木材胶粘剂的研究(I)——化学组成对粘接力学性能的影响    

Study on Polyurethane Adhesive of Wood(Ⅰ)——Effects of Chemical Constituents on Mechanical Properties of Adhesive

文献类型:期刊文献

中文题名:聚氨酯木材胶粘剂的研究(I)——化学组成对粘接力学性能的影响

英文题名:Study on Polyurethane Adhesive of Wood(Ⅰ)——Effects of Chemical Constituents on Mechanical Properties of Adhesive

作者:王正[1] 王志玲[2] 任一萍[1]

第一作者:王正

机构:[1]中国林业科学研究院木材工业研究所;[2]济南大学化学化工学院

年份:2006

卷号:26

期号:1

起止页码:57-61

中文期刊名:林产化学与工业

外文期刊名:Chemistry and Industry of Forest Products

收录:CSTPCD;;Scopus;CSCD:【CSCD2011_2012,CSCD_E2011_2012】;

基金:国家863计划资助项目(2002AA245141)

语种:中文

中文关键词:聚氨酯;木材胶粘剂

外文关键词:polyurethane ;wood adhesive

分类号:TQ433.432

摘要:以多亚甲基多苯基多异氰酸酯(PAPI)和聚醚多元醇为原料合成了一种单组分、室温湿固化的端异氰酸酯聚氨酯胶粘剂。本研究考察了物料的化学组成对胶粘剂粘接木材的力学性能产生的影响。实验表明,与改性二苯基二异氰酸酯(MD I)相比,PAPI合成的胶粘剂对木材粘接干压剪强度提高了60%;将相对分子质量(MW)为800、1 000和2 000的聚氧化乙烯二醇(PED)、MW为300和3 000的聚氧化丙烯三醇(N303和N330)以及聚四氢呋喃-氧化丙烯二醇(NG220)按优化的比例复合使用,以改性胺和有机锡复合催化,可有效提高粘接木材的干和湿压剪强度、固化速率以及木破率。FT-IR光谱证实聚醚多元醇的—OH与PAPI的—NCO反应生成了氨基甲酸酯(—NHCOO—),但N—H和C O均以氢键形式存在。
A single-component polyurethane adhesive for bonding wood curable at room temperature under moist condition was synthesized from methylene-bridged polyphenylene polyisocyanate (PAPI) and polyether polyol. Effects of chemical constituents on mechanical properties of adhesive were studied. The results showed that press shearing strength of poplarwood (Populus × cv. ) board bonded with this adhesive was 60 % higher than that with MDI. Using polyethere oxide diols(PED) of relative molecular weight( Mw ) 800,1 000 and 2 000, with polypropylene oxide triols of Mw 300 and 3 000 ( N303 and N330 ), and polytetramethylene ether glycol-propylene oxide diol ( NG220 ), at optimal ratio, catalyzed by compounded catalyst of modified amine and organic stannum, dry and wet press sheafing strengths and curing speed of the adhesion could be efficiently incresed, especially wet wood failure could reach 100 % and 90 % for bonding poplarwood and oakwood respectively. The formation of -NHCOO- between hydroxyl groups of polyol and isocyanate groups of PAPI was verified by Fr-IR spectroscopy.

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