ダウンロード数 : ?
タイトルヨミ
ポリ 2 メチル 5 ビニルピリジン ヨウエキ ノ クッセツリツ ノウド ヘンカ ケイスウ ニツイテ
日本語以外のタイトル
A Note on the Specific Refractive Index Increments for Poly (2-methyl-5-vinylpyridine) Solutions
ファイル
言語
英語
著者
坂本 範行
坂田 修
土岐 堅次
内容記述(抄録等)
The information of the specific refractive index increment of a solution, dn/dc, is mainly required to the determination of molecular weights of polymer by light scattering, which is defined as (n-n_1)/c, where n, n_1, and c are the refractive indices for the solution, the solvent and the concentration of solute (in grams per milliliter), respectively. A precise knowledge of the specific increment is, moreover, a prerequisite not to incur an uncertainty in molecular weights, because it enters as a square term in the constant K of the basic equation of light scattering.
However, the value is not a characteristic constant of a given polymer, but depends on the temperature, the pressure, the wavelength of light and the nature of solvent, and their measurements are delicate and mistakable. Though R. Chiang also emphasized an importance of the precision of dn/dc values in his book, few discussions have been made about these problems till now.
Conventionally it is known that the empirical relation of Gradstone-Dale is held among the natures of solvent and solute, and their increments, which may be convenient to calculate the value of dn/dc in other solvents and at other temperatures from data already known, provided the heighest accuracy is not required.
In this paper, the application of the relation to poly (2-methy-5-vinyl pyridine) - solvent systems and its validity were discussed briefly, considering the condition under which this rule is established.
掲載誌名
島根大学文理学部紀要. 理学科編
5
開始ページ
83
終了ページ
90
ISSN
03709434
発行日
1972-03-10
NCID
AN0010806X
出版者
島根大学文理学部
出版者別表記
The Faculty of Literature and Science, Shimane University
資料タイプ
紀要論文
部局
総合理工学部
他の一覧