@article{MunierFrankeHeroldetal.2020, author = {Munier, Leo Felix and Franke, Tom and Herold, Nadine and Pfriem, Alexander}, title = {Humidity's Effect on the Dynamic-mechanical Behavior of Phenol-formaldehyde Impregnated Beech Wood Veneer}, series = {BioResources}, journal = {BioResources}, number = {15(1)}, doi = {10.15376/biores.15.1.1563-1574}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-3841}, pages = {1563 -- 1574}, year = {2020}, abstract = {The dynamic-mechanical behavior of phenol-formaldehyde-impregnated beech wood (Fagus sylvatica L.) veneers was evaluated at various relative humidities. The aim was to identify the plasticizing effects of moisture on phenol-formaldehyde-impregnated veneers. Thin beech veneer samples were impregnated with a low and a medium molecular weight phenol- formaldehyde resin. The measurements were performed with a dynamic- mechanical thermal analysis equipped with a humidity generator. The storage modulus and the loss factor of the uncured phenol-formaldehyde- impregnated and the untreated control veneers were determined at a relative humidity of 15\%, 60\%, and 85\% and a constant temperature of 25 °C. The untreated control veneers exhibited the smallest reduction of the normalized storage modulus. In contrast, the phenol-formaldehyde- impregnated samples exhibited a more intense relative reduction of the storage modulus with increasing relative humidity. This effect was more distinct for samples impregnated with low molecular weight phenol- formaldehyde than for those impregnated with medium molecular weight phenol-formaldehyde. In addition, higher solids contents in the resins led to even smaller normalized storage modulus. Consistently, the loss factor indicated a greater softening of the samples with an increasing humidity and higher solids content of the phenol-formaldehyde.}, language = {en} } @inproceedings{FrankeLenzHertrichetal.2016, author = {Franke, Tom and Lenz, Claudia and Hertrich, Sven and Kehr, Martin and Kuhnert, Niklas and Munier, Leo Felix and Schultz, Marcus and Stepputat, S{\"o}ren and Herold, Nadine and Pfriem, Alexander}, title = {K{\"u}nstliche Bewitterung von Buchenfurnier (Fagus sylvatica) impr{\"a}gniert mit drei Phenolharzen unterschiedlichen Molekulargewichts}, doi = {10.57741/opus4-760}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-7609}, pages = {1}, year = {2016}, language = {de} }