Micromechanical properties of the interphase in pMDI and UF bond lines

被引：34

作者：

Stoeckel, Frank ^{[1
,2
]}

Konnerth, Johannes ^{[1
]}

Moser, Johann ^{[3
]}

Kantner, Wolfgang ^{[3
]}

Gindl-Altmutter, Wolfgang ^{[1
,2
]}

机构：

[1] BOKU Univ Nat Resources & Life Sci, Inst Wood Sci & Technol, Dept Mat Sci & Proc Engn, A-1190 Vienna, Austria

[2] Kompetenzzentrum Holz GmbH, A-4021 Linz, Austria

[3] Dynea Austria GmbH, A-3500 Krems, Austria

来源：

WOOD SCIENCE AND TECHNOLOGY | 2012年 / 46卷 / 04期

关键词：

WOOD CELL-WALLS; UREA-FORMALDEHYDE RESIN; SPRUCE WOOD; ULTRAVIOLET MICROSCOPY; ADHESIVE PENETRATION; NANOINDENTATION; INDENTATION; PERFORMANCE; VALIDITY; HARDNESS;

D O I：

10.1007/s00226-011-0432-0

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Micromechanical properties of cured polymeric diphenylmethane diisocyanate (pMDI) and urea formaldehyde (UF) adhesive and wood cell walls (beech) in adhesive contact compared with cell walls without adhesive contact were measured in situ by means of nanoindentation. Using UV-microphotometry obtained absorbance spectra of micromechanical investigated cell wall regions gave a strong indicator for the presence of pMDI compounds in wood cell walls. Nanoindentation results reveal that both pure UF and UF-penetrated cell walls show a very brittle character. In contrast, pMDI adhesive is very tough and soft at the same time, and when diffused in cell walls, it does not mechanically embrittle the cell structure.

引用

页码：611 / 620

页数：10

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