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The stress relaxation of wet wood during the diffusion of hydrochloric acid (Forestry)
https://kpu.repo.nii.ac.jp/records/4794
https://kpu.repo.nii.ac.jp/records/47949b2e03ad-07cf-4ec0-a8ac-bda8c457bbdd
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00000078793.pdf (562.5 kB)
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| Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||
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| 公開日 | 2017-02-20 | |||||
| タイトル | ||||||
| タイトル | The stress relaxation of wet wood during the diffusion of hydrochloric acid (Forestry) | |||||
| 言語 | en | |||||
| その他（別言語等） | ||||||
| その他のタイトル | 塩酸の拡散過程における湿潤材の応力緩和(林学部門) | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ | departmental bulletin paper | |||||
| 著者 |
浦上, 弘幸
× 浦上, 弘幸 |
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| 抄録(日) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | ヒノキ材に塩酸を作用させたときの応力緩和を捩りの方法を用いて検討した。得られた結果は次のとおりである。1)塩酸にあらかじめ浸漬してある場合(過程A)の応力緩和は温度に, また飽水状態のもとでほぼ平衡に達するまで緩和させたのち塩酸を作用させた場合(過程B)の応力緩和は濃度に, 影響される。2)過程Bの曲線(塩酸添加後)は過程Aの曲線よりもつねに低い値を示す。このような現象を示す理由としては応力下で塩酸が木材中に拡散する場合無応力状態でのそれよりも粘弾性挙動に関与している結合を多く切断し, 分子の再配列や流動がいっそう容易になるためと考えられる。3)水で飽和された木材の塩酸に対するアクセシビリティは作用させた温度と濃度の関数として表わされる。 | |||||
| 言語 | ja | |||||
| 抄録(英) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The action of hydrochloric acid on Hinoki wood (Chamaecyparis obtusa S. et Z.) was studied using the stress relaxation technique by means of torsional method. The results obtained are as follows : 1) The rate and extent of stress relaxation in hydrochloric acid are dependent on the concentration of the acid used and the temperature at which measurements are made. Especially, the relaxation behaviors in the process-A (the specimen immersed previously in hydrochloric acid of various concentrations is allowed to relax at different temperatures.) are affected mainly by temperature, and in the process-B (the specimen saturated with distilled water is allowed to relax previously in water, and then the relaxation behaviors after the addition of the acid are observed.), by the concentration of the acid. 2) The values of the relaxation curves after the addition of the acid in the process-B are lower than those in the process-A at each temperature. As a reason for this phenomenon, assumedly the more number of bonds contributing to the stress relaxation behaviors when the acid diffuses into the specimen saturated with water under loading is broken than when the dry specimen was immersed in the acid under the state of no load, and the scission makes the rearrangement and the flow of chain molecules more easy under the process-B. 3) Relative accessibilities of wood saturated with water to hydrochloric acid are obtained by extrapolating the linear portions of the stress relaxation curves (log stress vs. time) following the acid addition to the zero time ordinates. The accessible fractions to hydrochloric acid in wood saturated with water increase as either the acid concentration or temperature increases. Therefore, its determination is relative and should be reported in a manner to indicate the experimental conditions used in its determination in detail in the case of wood, as described by Lemiska et al. | |||||
| 言語 | en | |||||
| 書誌情報 |
ja : 京都府立大學學術報告. 農學 en : The scientific reports of Kyoto Prefectural University. Agriculture 巻 18, p. 99-106, 発行日 1966-09-01 |
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| 雑誌書誌ID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00062275 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 00757373 | |||||
