Investigation on physical behavior of styrene wood-polymer in different concentrations of monomer
| Autor: | maryam ghorbani, rojin kaki |
|---|---|
| Jazyk: | perština |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Iranian Journal of Wood and Paper Industries, Vol 7, Iss 2, Pp 231-239 (2016) |
| Druh dokumentu: | article |
| ISSN: | 2008-9066 2423-3242 |
| Popis: | This research was conducted to study the effect of different concentrations of styrene lumen monomer on the physical properties of beech wood. Physical test samples were prepared according to ASTM-D1037 standard and treated with vacuum-pressure method at five concentration levels; 0, 40, 60, 80 and 100 percent of soluble monomer. For polymerization, treated samples were heated in oven for two 24-hour period at 90 and 103ºC respectively. Monomer and polymer absorption, density variation, water absorption, swelling and anti-swelling efficiency (ASE) were determined. According to the results, Monomer and polymer absorption were increment by monomer concentration increase, and they were reported 38.2% and 26% in highest level. With polymer absorption enhancement, density of wood increased from 0/63g/cm³ in control to 0/91g/cm³ in the highest monomer concentration level that reduces pores in wood-polymer structure. Absorbed polymer enhancement decreased hydrophilicity and dimensional changes of treated samples, so that water absorption and swelling volume of the samples saturated with 100% concentration of monomer were decreased 64% and 45.3% after the longest immersion time. Highest Anti-swelling efficiency of Styrene-saturated samples was determined 56.15% in the maximum concentration level of treatment. |
| Databáze: | Directory of Open Access Journals |
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