試作した同心円筒回転振動型レオメーターと粘弾性体の末端効果 : レオメーター

概要

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The study of dynamic mechanical properties of materials is well recognized to be of both practical and theoretical value. But few works have been reported on the elastic properties of the molten polymers, although engineers encounter a number of difficult problems caused by the properties. In the present paper, a new device of cup-bob-rod system, particularly designed for the molten polymers, is reported torgether with the experimental data on the end-effect obtained by the trially produced dynamic phase contrast co-axial cylinder viscometer shown in Photo. 1 and diagramatically in Fig. 1. In the system, as illustrated in Fig. 2, the cup is electrically heated with nichrome wire. By the use of this cup in combination with such a plunger as shown in Fig. 3, samples my be easily preformed into cylindrical tablets closely fitted to the cup dimensions. The most essential characteristic of the system is that the centering of bob both at the immersion of itself into the test specimen and at the rotation is achieved by the narrower clearance indicated in Fig. 4. To gain the smooth rotational simple vibration, it is desirable to introduce silicone oil into the clearance. This heat-resistant oil also prevents the rapid oxidation of the specimen through cutting off the diffusion of fresh air.
社団法人日本材料学会の論文
1959-04-15