巻号一覧
82 巻, 8 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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研究論文
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中村 典彦, 白井 浩行, 林 浩文2009 年 82 巻 8 号 p. 339-343
発行日: 2009年
公開日: 2010/06/01
ジャーナル フリーThe polymer modification by the reactive mixing using Banbury mixer was examined under various conditions. It became clear that it was necessary to add ZnO and sulfur for the reaction of Si75: [bis(3-triethoxysilylpropyl) disulfide; TESPD] with the polymer without affecting the processability. The modified polymer thus obtained showed small signal at 3.8 ppm which is attributable to TESPD moiety in 1H-NMR analysis. The improvement of Payne effect and decrease of tanδ were observed by using the modified polymer. This technology is expected to be effective to reduce the rolling resistance of tire.抄録全体を表示PDF形式でダウンロード (414K)
技術論文
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権藤 豊彦, 森 哲夫, 藤 道治, 古川 睦久2009 年 82 巻 8 号 p. 344-348
発行日: 2009年
公開日: 2010/06/01
ジャーナル フリーFew reports have been published on the influence of the uniformity of rubber compounds on the quality of rubber products. In this work, NBR compounds of different degree of dispersion of additives were vulcanized in a mold equipped with two electrodes to measure the electric current during vulcanization. The electric current-cure time curves of these samples reflected the uniformity of NBR compounds.抄録全体を表示PDF形式でダウンロード (700K)
総説
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白波瀬 朋子, 波多野 道子, 大塚 英幸, 高原 淳2009 年 82 巻 8 号 p. 349-355
発行日: 2009年
公開日: 2010/06/01
ジャーナル フリーBiodegradable segmented poly(urethane)s (SPUs) and poly(urethane-urea)s (SPUUs) were synthesized by a standard two-step prepolymer method using two kinds of diisocyanates (methyl 2,6-diisocyanatohexanoate (LDI) and 1,4-diisocyanatobutane (BDI)) and polycaprolactone diol (PCL) as a soft segment combined with two kinds of chain extenders (1,3-propanediol (PDO) and 1,4-butanediamine (BDA)) as a hard segment. Thermal analysis by differential scanning calorimetry, wide angle X-ray diffraction (WAXD), and small angle X-ray scattering measurements revealed that different kinds of diisocyanates and chain extenders in SPUU affected the crystallinity of PCL segment and the microphase separation structure consisted of soft and hard segments. Diffraction pattern in WAXD due to the crystallization of PCL components inhibited in the cases of two SPUUs with LDI-BDA and BDI-BDA hard segments. Furthermore, these two kinds of SPUU showed good elastic properties because the crystallization of PCL component was inhibited by the strong aggregation of hard segments. The mechanical properties and degradability of poly(L-lactide) (PLLA)/SPUU blends were also investigated. A toughness of PLLA was enhanced by blending with SPUU. Also, this blend shows degradation owing to the hydrolysis. It was revealed that brittleness of PLLA was improved through blending with biodegradable SPUU without sacrificing degradability.抄録全体を表示PDF形式でダウンロード (1859K) -
阿部 憲幸, 三俣 哲2009 年 82 巻 8 号 p. 356-362
発行日: 2009年
公開日: 2010/06/01
ジャーナル フリーSoftmaterials containing magnetic particles demonstrate the change in rheological properties upon magnetic field, this is called the magnetorheology. A variety of magnetorheological materials has been investigated for the past decade. The magnetic effect on the rheological properties strongly depends on not only the types of matrix but also magnetic particles. A magnetic gel consisting of polysaccharide matrix demonstrates negative and remarkable changes in dynamic modulus upon magnetization (~107 Pa). In this review, we survey the general magnetorheological effect of various softmaterials and describe the phenomenon and mechanism of the negative magnetorheological effect seen in the polysaccharide magnetic gels.抄録全体を表示PDF形式でダウンロード (1514K)
特論講座
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山子 茂, 中村 泰之2009 年 82 巻 8 号 p. 363-369
発行日: 2009年
公開日: 2010/06/01
ジャーナル フリーLiving radical polymerization (LRP) has been regarded as a fundamental technology for the creation of structurally well controlled polymeric materials with increased and/or new properties. This second article describes three methods of LRP, namely reversible addition-fragmentation chain transfer polymerization (RAFT), organotellurium-, stibine-, and bismuthine-mediated LRP (TERP, SBRP, BIRP), and cobalt-mediated LRP (CMRP) focusing on their methods and mechanisms. Although degenerative chain transfer mechanism plays a key role in all these three LRP methods, the differences in chemical structure of dormant species and detail chain transfer mechanisms characterize synthetic scope and limitation of each method.抄録全体を表示PDF形式でダウンロード (317K)
入門講座 やさしいゴムの物理
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編集委員会2009 年 82 巻 8 号 p. 370-374
発行日: 2009年
公開日: 2010/06/01
ジャーナル フリーPDF形式でダウンロード (355K)
紹介
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2009 年 82 巻 8 号 p. Annc08_215
発行日: 2009年
公開日: 2010/06/01
ジャーナル 認証ありPDF形式でダウンロード (272K)
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