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湿材胶合用单组分聚氨酯胶黏剂及其胶合木蠕变性能研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2009年04期
Page:
121-124
Column:
研究论文
publishdate:
2009-07-30

Article Info:/Info

Title:
Study on creep of one component polyurethane adhesives for green wood gluing and glulam
Author(s):
NA Bin1 A.PIZZI2 LU Xiaoning1
1.College of Wood Science and Technology, Nanjing Forestry University, Nanjing 210037, China; 2.ENSTIB LERMAB, University of Nancy 1, 88051 Epinal, France
Keywords:
polyurethane adhesives green wood gluing TMA NMR plywood creep character
Classification number :
S781
DOI:
10.3969/j.jssn.1000-2006.2009.04.026
Document Code:
A
Abstract:
The chemical structure, polymerization characteristics of the commercial onecomponent polyurethane were analyzed with 13C NMR. The viscoelastic properties of bonded joints, ambient creep and shear properties of glulam beams were evaluated by thermomechanical analyses. The results showed that onecomponent polyurethane displayed a significant temperaturedependent creep, and the ambient creep was not the main factor because it was inhibited. The equilibrium moisture content (EMC) of the wood before and after bonding had a great influence on bonding performance of polyurethane. The mechanical properties of glulam from green gluing could not meet the requirement of any structure standards, but good bonding performance of wood after redrying was observed.

References

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Last Update: 2009-07-30