巻号一覧
40 巻, 3 号
選択された号の論文の8件中1～8を表示しています
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藤倉 嘉昭, 鈴木 孝制, 松本 昌一1984 年 40 巻 3 号 p. T95-T100
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリーPVC粉末とDMF溶液を熱処理して脱塩酸PVCを得た。その脱塩酸PVCのふく射率を脱塩酸度,粉末熱処理と溶液熱処理の差,変色とふく射体試料の形状変化などに注目して測定を行なった。PVCは脱塩酸が進むとポリエン構造が増加して粒状に変化する。脱塩酸PVCのふく射率と脱塩酸度との関係は,粉末熱処理試料と溶液熱処理試料では異なることが明らかになった。PVC試料は脱塩酸が進むにつれて減量する。例えばふく射測定時の単位面積当たりの初期PVC 8mgは,粉末熱処理で脱塩酸度82%になると4.15mgに,また溶液熱処理で説塩酸度97%になると3.48mgに約50%も減量するにもかかわらず,ふく射率にわずかに増加することが明らかにされた。抄録全体を表示PDF形式でダウンロード (387K) -
市村 国宏1984 年 40 巻 3 号 p. P97-P104
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (592K) -
田中 信行1984 年 40 巻 3 号 p. T101-T103
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリーThe strain recovery elasticity caused by the rapid removal of m2 from the load (m1+m2) on a fiber was studied for the nylon-6 fibers in water. The initial velocity _??_1 at t(time)=0 of strain recovery is given by where C1 is the spring constant, m1 is the constant load on a fiber, m2 is the removal load on a fiber and G is the gravitational acceleration. The value of C1 obtained is about 2.66×107dyne/cm at a light load of m1 (_??_0.03g/d) and about 3.6×106dyne/cm at a load m1 over 0.19g/d, respectively. The former is almost equal to that of the nylon-6 crystal and the latter is in the range of C1 (3.35×106_??_6.21×106dyne/cm) of the high tenacity yarns of nylon-6.抄録全体を表示PDF形式でダウンロード (178K) -
PEOの分子量による影響趙 耀明, 木村 良晴, 谷口 五十二, 佐野 嘉行1984 年 40 巻 3 号 p. T104-T112
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリーPoly (ethylene terephthalate) (PET) fibers containing poly (oxyethylene) (PEO) were prepared to study the molecular weight effect of PEO upon antistatic property. A series of fibers containing 2wt% of PEO with molecular weight Mn=4, 000 (PEO (4)), 20, 000 (PEO (20)), and 100, 000 (PEO (100)) as well as the fiber containing 10wt% of PEO (20) were spun by a melt spinning at 270°-280°C, and then submitted to 4.9-fold drawing and heat-treated at 170°C. Each fiber was washed in a boiling water for 1hr.
Observation of the transversal sections of the unwashed fibers by light (LM) and scanning electron microscopes (SEM) showed that PEO particles are distributed in the PET matrix. The particle size of PEO in the as-spun fibers increased markedly with increasing the Mn, and its size and number decreased after drawing. The antistatic property of the drawn fibers evaluated by half-lifetime of leakage of static charge was improved with the increase in PEO's Mn. Therefore, this tendency is to be explained in connection with its particle size. The particle size in the sample containing 10wt% PEO (20) was the same as that in the sample containing 2wt% PEO (20), though the number was much larger than that of the latter sample. For the both fibers, the antistatic properties before washing were in the same level.
The LM and SEM photographs of the washed fibers indicated that PEO particles bled out from the interior of fiber, with the fibers' inner structure being porous. This observation is correlated with the deterioration of antistatic property after washing. The rate of bleed-out of PEO (20), however, was somewhat slower than that of other PEOs, i.e., the PEO (20) particles still remained on the fiber surface after washing. This may explain the fact that the antistatic property of the fiber containing PEO (20) was unchanged or improved after washing.
The viscoelastic nature of those blend fibers was also examined. It showed that the compatibility of PEO with PET decreased with the molecular weight increase of PEO. A tendency to deterioration of mechanical properties of the blend fiber is consistent with this incompatibility. It can be concluded from these findings that blending about 2wt% PEO (20) is the most effective as far as homopolymer of PEO is used for antistatic modification of polyester.抄録全体を表示PDF形式でダウンロード (2446K) -
酒井 清1984 年 40 巻 3 号 p. P105-P110
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1171K) -
坂本 宗仙, 小原 奈津子, 若林 宗宏, 西本 信, 中山 文孝1984 年 40 巻 3 号 p. T113-T121
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリーChemically modified amino acids in the silk and wool fibers treated with epichlorohydrin (E), glycidol (G) and glycidyl methacrylate (GMA), were identified by gas chromatography-mass spectrometry as their N(O)-trifluoroacetyl n-butyl ester derivatives. O-(Dihydroxypropyl)-and O-(chlorohydroxypropyl)tyrosines, and Nε-(dihydroxypropyl)-and Nε, Nε-bis(dihydroxypropyl)lysines were identified in all silk and wool samples, indicating that OH and Cl groups of the epoxide-amino acid adducts were labile during acid hydrolysis of the samples. Nε, Nε-Bis (chlorohydroxypropyl) lysine and O-[(dihydroxypropoxy)hydroxypropyl] tyrosine were also identified in the silk and wool fibers treated with G, the latter being formed by addition of a second molecule of G to O-(dihydroxypropyl) tyrosine residue. S-(Dihydroxypropyl)-and S-(2-carboxypropyl) cysteines were identified by the single ion monitoring (SIM) method for the wool fibers treated with GMA, indicating that thiol groups of cysteine residues could react with both epoxy and methacryl groups of GMA. S-(Chlorohydroxypropyl) cysteine as well as S-(dihydroxypropyl) cysteine were found in the other wool samples by the SIM method. Nε-(Chlorohydroxypropyl)- and Nε, Nε-bis (chlorohydroxypropyl) ly sines were also found in the wool fibers treated with E by the SIM method.抄録全体を表示PDF形式でダウンロード (605K) -
山本 吉威, 三軒 齊, 中野 英彦1984 年 40 巻 3 号 p. T122-T124
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリー芳香族ポリエステルエ-テル同族体のアルカリ加水分解速度を60°C～90°Cの温度下で測定し,加水分解の活性化エネルギーを求めた。測定の結果,芳香族ポリエステルエ-テル同族体がポリエチレンテレフタラ-トより高い耐アルカリ性をもつことがわかった。ポリエチレン-1,2-ジフェノキシエタン-p, p′-ジカルボキシラート(B型ポリエステルエーテル)についての加水分解の活性化エネルギーの値は22.6kcal・mole-1であった。抄録全体を表示PDF形式でダウンロード (169K) -
甲本 忠史, 田中 研二, 広中 清一郎1984 年 40 巻 3 号 p. T125-T128
発行日: 1984/03/10
公開日: 2008/11/28
ジャーナル フリー関節軟骨類似のハイドロゲル構造をもつ人工関節モデルを設計し,その摩擦挙動を調べるために, γ-線前照射した高密度ポリエチレン(HDPE)にポリビニルアルコール(PVA)を水溶液中で放射線グラフトした。摩擦実験をボール/円板型摩擦試験機を用いて行った。水中での摩擦係数はHDPEのみの0.04から0.02とPVAをグラフトすることにより低下した。すなわちハイドロゲル構造が摩擦係数の低下に有効であることが明らかになった。PVAグラフト試料の摩擦摩耗の前後の表面について,電顕観察も行った。抄録全体を表示PDF形式でダウンロード (959K)
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