巻号一覧
2 巻 (1990)
- 6 号 p. 485-
- 5 号 p. 405-
- 4 号 p. 331-
- 3 号 p. 227-
- 2 号 p. 141-
- 1 号 p. 45-
2 巻, 4 号
選択された号の論文の3件中1～3を表示しています
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堤 菁1990 年 2 巻 4 号 p. 331-335
発行日: 1990/08/20
公開日: 2009/11/18
ジャーナル フリーPDF形式でダウンロード (1075K) -
成澤 郁夫, 豊田 昌志, 北村 卓郎, 井上 一成1990 年 2 巻 4 号 p. 350-359
発行日: 1990/08/20
公開日: 2009/11/18
ジャーナル フリーA quantitative characterization of the degree of agglomeration of the particles in multi-phase polymer alloy systems has been carried out. A numerical agglomeration distribution function and its 4 moments were calculated from SEM photographs using computer image analysis. In a model alloy system of PC/MBS a good correlation between the degree of agglomeration of the MBS and of the impact strength has been obtained. In PBT/PC alloys, the effect of mixing conditions in the heating rolls on the distribution of particle diameter, ligament thickness between particles and degree of agglomeration have been examined. A similar analysis has been carried out on on the PBT/PC alloys mixed with an extruder. The results showed that increasing agglomeration of the dispersed phase (PC) reduced the impact strength when the matrix was composed of high molecular weight PBT.抄録全体を表示PDF形式でダウンロード (2569K) -
北尾 幸市, 三坂 望1990 年 2 巻 4 号 p. 360-365
発行日: 1990/08/20
公開日: 2009/11/18
ジャーナル フリーThe relationship between the melt flow behavior and mechanical properties in extruded polybutene-1 pipe was discussed with special emphasis on the molecular orientation caused by the extrusion process. It was demonstrated that the molecular orientation should be minimized in order to maintain product properties, such as fracture elongation. To minimize the molecular orientation the flow stress at the sizingsleeve inlet where the melt flow ends should be depressed. This flow stress characterises the draw ratio from which the extrusion rate was calculated.
The results also showed that the relationship between the die diamater and the product diameter should be optimized to reduce the flow stress especially at high extrusion rate. These results were also confirmed through actual extrusion tests.
In order to confirm the relationship between the molecular orientation and the product properties, extruded sheets having high orientation were also tested. The degree of molecular orientation was measured by Raman spectroscopy. The results confirmed that the elongation heavily depended on the molecular orientation.抄録全体を表示PDF形式でダウンロード (1098K)
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