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Volkmer, T.
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article
Evaluating the extent of bio-polyester polymerization in solid wood by thermogravimetric analysis
Abstract
The extent of bio-polyester oligomer polymerization within solid wood and the resulting thermal stability of the treated wood have been evaluated by thermogravimetric analysis(TGA). Low molecular weight oligomers of poly(lactic acid),poly(glycolic acid),poly(butylene succinate)and poly(butylene adipate)were impregnated and then thermally polymerized within solid wood to enhance physical properties of the treated wood. TGA revealed a similar degree of oligomer polymerization was achieved either in pure form or within the wood structure. The influence of relatively acidic treatments such as low molecular weight poly(glycolic acid)oligomers was observed to lead to degradation of the hemicellulose wood component. Polymerization of poly(lactic acid)and poly(glycolic acid)oligomers treatments which penetrate wood cell wall gave relatively greater wood thermal stability. Treatment and polymerization of lumen filling poly(butylene succinate)and poly(butylene adipate)oligomers contributed to lower wood thermal stability.