ECAP process in polypropylene

被引：5

作者：

Dept. of Human and Mech. Systems Eng., Kanazawa Univ., Kakuma-cho, Kanazawa, 920-8667 ^{[1
]}

不详 ^{[2
]}

机构：

[1] Dept. of Human and Mech. Systems Eng., Kanazawa Univ., Kanazawa, 920-8667, Kakuma-cho

[2] Kanazawa Univ., Kanazawa, 920-8667, Kakuma-cho

来源：

Zairyo | 2006年 / 1卷 / 37-41期

关键词：

Crystalline polymer; ECAP; Polypropylene; Skin layer; Spherulite;

D O I：

10.2472/jsms.55.37

中图分类号：

学科分类号：

摘要：

Equal channel angular pressing (ECAP) invented by Segal was applied successfully to metal process of aluminum and magnesium alloys for increasing their strength by fining the grain size. But a little attention has been paid to its application to polymers. In this paper, ECAP process of crystalline polymer, polypropylene (PP), was studied using optical microscope, differential scanning calorimetry (DSC), specific gravity measuring system and small tensile testing machine. It was shown that 1. ECAP was effective at a temperature slightly lower than the crystallization temperature and at a low pressing speed, 2. the shear deformation was very intense at the interior of the specimen, while the surfaces was not sheared and 3. the yield stress of PP along the extrusion direction increased with an increase in the repeated numbers of ECAP process.

引用

页码：37 / 41

页数：4

共 7 条

[1]

Segal V.M., Reznikov V.I., Drobyshevsky A.E., Kopylov V.I., Russian Metall., 1, (1981)

[2]

Wu Y., Baker I., Scripta Materialia, 37, (1997)

[3]

Sue H.J., Li C.K.Y., J. Materials Sci. Letters, 17, (1998)

[4]

Sue H.J., Dilan H., Li C.K.Y., Polymer Eng. & Sci., 39, (1999)

[5]

Xia Z.Y., Sue H.J., Ricker T.P., Maclomolecules, 33, (2000)

[6]

Dijkstra P.T.S., Gaymans R.J., Huetink J., Polymer Eng. & Sci., 43, (2003)

[7]

Galesky A., Argon A.S., Coen R.E., Maclomolecules, 21, (1988)

← 1 →