Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Yutaka Obata"'
Publikováno v:
Journal of Applied Polymer Science. 108:76-84
Unique deterioration with a striped pattern caused by thermal heating is reported for injection molding comprising polypropylene/ethylene–α-olefin rubber blends. This stripe is due to the formation of glossy and cloudy parts in alternation approxi
Publikováno v:
Polymer Engineering & Science. 41:408-416
The effect of talc on the b-axis orientation of the polypropylene crystals in polypropylene (PP)/ethylene-propylene rubber (EPR)/talc blends of injection molding was examined using the X-ray diffraction method. The b-axes of the PP crystals were most
Publikováno v:
Biopolymers. 38:557-566
The molecular and crystal structure of curdlan triacetate, acetylated (1 → 3)β-D-glucan, was analyzed by means of an x-ray diffraction technique with the help of the linked-atom least-squares method. Unit cell dimensions are a = b = 11.00(1), c(fi
Publikováno v:
Polymer. 36:1123-1126
A molecular simulation technique, combined with X-ray diffraction measurements, was applied to the determination of the crystal structure of poly(4,4′-diphenylene pyromellitimide), a high-modulus aromatic polyimide. Simulation of the crystal struct
Publikováno v:
Macromolecules. 28:1547-1551
The molecular conformation and crystal structure of an aromatic polyimide, poly[(4,4'-diphenylene)pyromellitimide] (PMB), was analyzed by means of X-ray diffraction and a linked-atom least-squares method. X-ray diffraction intensity data were recorde
Publikováno v:
Macromolecules. 27:7601-7605
The molecular and crystal structure of the anhydrous form of chitosan, a (1→4)-linked 2-amino-2-deoxy-β-D-glucan, has been determined by combined X-ray diffraction analysis and stereochemical model refinement. Chitosan chains crystallize in an ort
Autor:
Yutaka Obata, Kenji Okuyama
Publikováno v:
KOBUNSHI RONBUNSHU. 51:371-378
従来のX線フィルムの代わりに高感度で広いダイナミックレンジを持つイメージングプレートを用い, 繊維状高分子のX線強度測定システムを開発した. データ処理には計算処理能力が優れ,
Publikováno v:
Journal of the Society of Materials Science, Japan. 43:217-222
It is generally known that crazing and/or cracking sometimes occurs on the surface of glassy polymers in contact with solvent. In this report, this environmental stress cracking (ESC) in ABS polymer-fron system was studied from the standpoint of sorp
Autor:
Kenji Okuyama, Yutaka Obata
Publikováno v:
KOBUNSHI RONBUNSHU. 49:297-303
イメージングプレート (IP) は位置分解能の良さ, 広い検出領域と均一な感度を持つ二次元検出器である. 本論文ではIPを繊維状高分子の結晶構造解析に用いるために, IPからの積分強度を得
Publikováno v:
NIPPON GOMU KYOKAISHI. 64:363-371
加硫ゴムの破壊理論には試料に存在する潜在的な欠陥点のサイズ分布を Griffith の理論によって強度分布と結びつけた flaw 説があるが, 疲労破壊においては flaw から発生したクラックの生