期刊论文

中文

热固性树脂

1002-7432

2015

30

6

33-37

10.13650/j.cnki.rgxsz.2015.06.008

国家林业公益性行业科研重大专项(201304504) 湖南省高校创新平台开放基金(13k072)资助

本校为第一机构

通过力学性能测试,红外光谱分析和电镜分析研究了木结构工程材用间苯二酚甲醛树脂胶粘剂的制备工艺,探讨了原料配比,反应温度和时间等对胶粘剂性能的影响。结果表明,间苯二酚-苯酚-甲醛树脂的最佳合成条件为:间苯二酚与苯酚物质的量比为1:(3-7);苯酚与甲醛物质的量比1:1.5;反应体系pH值10.0,预反应温度90 ℃,共反应温度65 ℃,共反应时间1 h。该树脂可采用15%多聚甲醛(基于树脂质量)室温固化,固化物干剪切强度为13.0~14.0 MPa,湿剪切强度为6.5~8.0 MPa,满足国家标准GB/T 50708-2012要求。

The preparation process of resorcinol-phenol-formaldehyde resin adhesive for wood structural engineering materials was investigated by mechanical tests,infrared spectroscopy and electron microscopy analysis. The effects of raw material ratio,reaction temperature and time on the adhesive properties were discussed. The results showed that the optimal synthesis conditions of resorcinol- phenol- formaldehyde resin were as followed:molar ratio of resorcinol to phenol 1:(3-7),molar ratio of phenol to formaldehyde 1:1.5,p H value of reaction system 10...