木質材料の改良に関する研究(第5報) : PMMA-Hinoki Combination の吸水挙動

島根大学農学部研究報告 Volume 4 Page 110-112 published_at 1970-12-15
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Title
木質材料の改良に関する研究(第5報) : PMMA-Hinoki Combination の吸水挙動
Title
Studies on the Improvement of Wooden Materials(V) : Behavio of Water Absorption on PMMA-Hinoki Combination
Title Transcription
モクシツ ザイリョウ ノ カイリョウ ニ カンスル ケンキュウ ダイ5ホウ PMMA-HINOKI COMBINATION ノ キュウスイ キョドウ
Creator
Goto Teruo
Onishi Hirotsugu
Source Title
島根大学農学部研究報告
Bulletin of the Faculty of Agriculture, Shimane University
Volume 4
Start Page 110
End Page 112
Journal Identifire
ISSN 0370940X
Descriptions
In this paper, the behavior of water absorption on PMMA-Hinoki combination(WPC) has been investigated, following the hygroscopicity experiment of the previous report (IV).
The specimens(10(R) ×50(T) ×5(L) mm) of Hinoki(Chamaecyparis Obtusa ENDL.) were impregnated with methy methacrylate(MMA), using various treatment conditions, and cured by the catalyst-heat technique as described in the previous report.
The ASE(anti-swelling efficiency) measurements were made on vacuum-dry and water-soaked specimens. The specimens were allowed to soak until equilibrium swelling was reached. The dimensional change in tagential direction were then measured and the ASE was calculated.
The results obtained are as follows :
The behavior of water absorption on WPC shows a different phenomenon from that of hygroscopicity. Namely, the results concerning the relation between ASE and polymer content(Fig. 3) showed a tendency approximately similar to those of Loos' study. Although an inverse proportional relation between polymer content and water absorption is obtained(Fig. 2), at higher polymer content the ASE values tend to drop off and show values near to zero. As the reason for this, it is assumed that at high polymer content the specimens shrink due to the shrinkage of the monomer during polymerization, and thus during swelling this shrinkage stress is relieved causing greater than normal swelling.
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根大学農学部
Shimane University, Faculty of Agriculture
Date of Issued 1970-12-15
Access Rights open access
Relation
[NCID] AN00108015