巻号一覧
28 巻, 6 号
選択された号の論文の7件中1～7を表示しています
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有機促進劑の作用について鳥山 喜基, 箕浦 有二1955 年 28 巻 6 号 p. 328-332
発行日: 1955/06/15
公開日: 2009/10/16
ジャーナル フリーEbonite is generally made by vulcanising crude rubber to which has been added 3040% of sulphur with accelerators, zinc oxide, ebonite powder, etc. On obtaining ebonite directly from latex, there have been made only a few studies. The authors have made ebonite directly from latex and made studies on the influence of accelerators seen in this case. Natural latex with high percentage of sulphur added gives, when valcanised, ebonite as solid rubber similarly treated. Quick vulcanisation is also possible, if an ultra-accelerator is used. The authors describe their fundamental studies on (atex-ebonite). They added several types of marketsold organic accelerator and various percentage of sulphur to latex, and, on vulcanisation, have determined tensile strength, elongation, hardness and electric resistance of the vulcanisates. Further, comparative studies were made on the vulcanising characteristics of organic accelerators, on quantitatively analysing the combined sulphur. The result obtained show that Zn diethyl dithiocarbamate, Zn dibutyldithiocarbamate and tetramethylthiuram disulphide have all a similar effect, while Zn ethylphenyl dithiocarbamate has a slower effect than these.抄録全体を表示PDF形式でダウンロード (629K) -
(第1報) ゴム加硫中の熱伝導の取扱い方久保田 威夫, 五味 正富1955 年 28 巻 6 号 p. 333-342
発行日: 1955/06/15
公開日: 2009/10/16
ジャーナル フリーIn the vulcanization of a rubber article, if the article is thick, the temperature in the interior may never reach the temperature of the heating medium, and unsteady state conduction occurs during the whole cure. Therefere, it is difficult to obtain thick rubber articles cured uniformly. In order to obtain the best performance from the thick vulcanized article, the rate of cure of interior compounds must be adjusted until they show satis factory balance during the curing period. In such a case, the theoretical method for obtaining temperature-time relations at selected points within a rubber article might be very useful. Authors have solved the basic equation for heat conduction in one dimension, assuming the shape of rubber article is a uniform thick slab having constant c, ρ, k, the whole slab is initially at a temperature θ', and one side of surface is exposed to a heating medium of temp θi, the other side of surface is exposed to a heating medium of temp θe, the rate of heat transfer from the heating medium to the surface is infinitely great, the heat of chemical reaction between rubber and sulfur is negligible.
The solution for the temperature θ selected points within a slab is :
θ (p, q) = θifi (p, q) +θefe (p, q) +θf0 (p, q)
fi (p, q) = [1- {p+φ' (p, q)+φ' (p, q)}]
fe (p, q) = {p+φ' (p, q)}
f0(p, q)=φ' (p, q)
φ' (p, q) =2/π∞Σs= (-1) /Ss2π2qsin (2S+1) πp
φ' (p, q) =4/π∞Σs=01/2S+1e- (2S+1) 2πqsin (2S+1) πp p=x/a, q=αt/a2, α=k/cρ
a : thickness, t : time, c : specific heat,
ρ : density, k : Thermal conductivity if θi=θe
θ (p, q) =θi {1-f0 (p, q)} +θ'f0 (p, q)
Then authors have explained the application of theoretical equation to vulcanization and the practical method for obtaining temperature time relations at selected points within a slab.抄録全体を表示PDF形式でダウンロード (1295K) -
(第2報) 理論式のタイヤ加硫中の熱伝導への応用久保田 威夫, 五味 正富1955 年 28 巻 6 号 p. 342-346
発行日: 1955/06/15
公開日: 2009/10/16
ジャーナル フリーIn Report No. 1, authors have derived the theoretical equation for obtaining temperature-time relations at selected points within a slab from the basic equation for heat conduction in one dimension. The theoretical equation has been shown in the following from
θ (p, q) =Σθf
This paper has outlined the application of this equation to the heat conduction calculation in the vulcanization of tire. In the calculation of temperature rise in tire during vulcanization, theoretical f-values for a slab (fi, fe, f0) must be adjusted. Techniques for determining f-values which can be used successfully for the purpose of obtaining reliable temperature-time relations at selected points within a tire have been discussed and illustrated by an example.抄録全体を表示PDF形式でダウンロード (731K) -
(第3報) 等価加硫の考え方久保田 威夫1955 年 28 巻 6 号 p. 347-351
発行日: 1955/06/15
公開日: 2009/10/16
ジャーナル フリーTechniques for obtaining temperature-time relations at selected points within a slab and a tire, have been reported in Report No. 1 and Report No. 2, respectively. The final problem is to convert this tenperature-time curve into a measure of cure.
Techniques for calculating an “equivalent during time” -this may be defined as the time required at a selected constant temperature to give the same degree of cure as that given by the tenperature-time relationship under consideration. -from temperature-time curve to measure the degree of cure have been described in this paper,抄録全体を表示PDF形式でダウンロード (703K) -
浜田 利通1955 年 28 巻 6 号 p. 360-367
発行日: 1955/06/15
公開日: 2009/10/16
ジャーナル フリーPDF形式でダウンロード (1320K) -
Samuel W. McCune1955 年 28 巻 6 号 p. 368-370
発行日: 1955/06/15
公開日: 2009/10/16
ジャーナル フリーPDF形式でダウンロード (958K) -
F. J. Ritter1955 年 28 巻 6 号 p. 371-372
発行日: 1955/06/15
公開日: 2010/02/05
ジャーナル フリーPDF形式でダウンロード (385K)
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