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Hajime Serita

Akita University

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Kobunshi Ronbunshu | 1984

Flocculation of Aqueous Kaolin Suspension with Quaternary Ammonium Salts of 2-Vinylpyridine-Vinyl Alcohol Copolymer

Hajime Serita; Noritaka Ohtani; Toshiaki Matsunaga; Chikai Kimura

2-ビニルピリジンービニルアルコール共重合体 (2VP-VA) の4級アンモニウム塩 (ポリマ-) を2VP-VAへの種々の奥化アルキルの反応により得た. 5%カオリン懸濁液に対する凝集能を沈降速度, 沈降容積そして残留濁度を測定することによりポリマーの構造との関連において研究した. 得られた結果は次の通りであった. 1) いずれのポリマーを用いた場合でも, ポリマー添加濃度が6～20ppmの範囲で良好な凝集効果が得られ, また, これらの条件下で, カオリン粒子の電気泳動移動度は比較的小さい値を示した. 2) 凝集能はi) 幹ポリマーの分子愚の増加に伴って増加し, アルキル化剤の種類よりも幹ポリマーの分子量への依存性は高かった. ii) 水酸基のイオン性基の割合, すなわち (α/FV▲) の増加に伴って増加した, 3) より鎖長の短い臭化アルキルから得られたポリマーが良好な凝集効果を示す傾向がみられた. 4) 凝集作用に適当なpHの値は2～10の範囲であった.

Journal of Applied Polymer Science | 1976

Synthesis of alternating polyamide esters by melt and solution polycondensations of N,N′-Di(6-hydroxycaproyl) diamines and N-6-hydroxycaproyl aminoalcohol with terephthalic and adipic dimethyl esters and dichlorides

Shitomi Katayama; Tomohisa Murakami; Yukio Takahashi; Hajime Serita; Yukio Obuchi; Takato Ito

Bulletin of the Chemical Society of Japan | 1988

The Use of Silica Gel-Supported Ionenes as Reagents and Catalysts for Several Substitution Reactions in Toluene

Noritaka Ohtani; Kosaku Chida; Hajime Serita; Toshiaki Matsunaga; Chikai Kimura

Journal of Polymer Science Part A | 1977

Synthesis and properties of block poly(styrene amides) and poly(styrene esters)

Shitomi Katayama; Hajime Serita; Yukio Takahashi

Kobunshi Ronbunshu | 1993

Flocculation of Kaolin Suspension with Graft Copolymers of Chitosan.

Hajime Serita; Koichi Murai

Kobunshi Ronbunshu | 1988

Synthesis of amphoteric graft polyelectrolytes from poly(2- or 4-vinylpyridine) and .BETA.-propiolactone.

Hajime Serita; Koichi Murai

Journal of Japan Oil Chemists' Society | 1988

The Breaking of Dodecane/Water Emulsion with Ionene Polymers

Koichi Murai; Fumio Hamada; Hajime Serita; Chikai Kimura

Kobunshi Ronbunshu | 1986

Direct observation on surface charge of clay minerals flocculated by cationic by polyelectrolyte.

Hajime Serita; Norihiko Kohyama; Koichi Murai

Journal of Japan Oil Chemists' Society | 1981

Flocculation Effect of Quaternary Ammonium Salts of Poly [2- (N, N dimethylamino) ethyl Methacrylate] on Kaolin Suspension

Hajime Serita; Noritaka Ohtani; Chikai Kimura

Journal of Japan Oil Chemists' Society | 1980

Preparation of Polymer Electrolytes Derived from Polyurethaneamine

Hajime Serita; Noritaka Ohtani; Chikai Kimura

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Chikai Kimura

Akita University

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Koichi Murai

Akita University

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Noritaka Ohtani

Akita University

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Yukio Takahashi

Akita University

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Fumio Hamada

Akita University

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Shitomi Katayama

Akita University

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Takato Ito

Akita University

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Toshiaki Matsunaga

Tohoku University

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Yukio Obuchi

Akita University

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