Sintering rheology of amorphous polymers

Polymer Engineering and Science - Tập 21 Số 17 - Trang 1167-1170 - 1981
N. Rosenzweig1, M. Narkis1,2
1Department of Chemical Engineering, Technion City, Haifa, Israel
2Presently on sabbatical leave at the University of Connecticut, Chemical Engineering and Institute of Materials Science, Storrs, Connecticut 06268.

Tóm tắt

AbstractThe activation energy for sintering of poly(methyl methacrylate) particle pairs is shown to be similar to their activation energy for Newtonian flow. Sintering progress with time is in good agreement with the Frenkel's coalescence theory. Typical sintering shear rates are shown to be very low and potential energy change (two particles) is small in comparison with the surface energy change. These results lead to the conclusion that the coalescence sintering mechanism of amorphous polymers above their glass transition temperature is essentially a Newtonian viscous flow mechanism where surface tension is the major driving force. A periodical phenomenon associated with sintering progress with time is reported and a supporting mechanism is proposed.

Từ khóa


Tài liệu tham khảo

Frenkel J., 1945, J. Phys. (U.S.S.R.), 9, 385

10.1002/app.1970.070140815

10.1002/pen.760191302

Lontz J. F., 1964, Sintering of Polymer Materials, 25

Throne J. L., 1979, Plastics Process Engineering, 597

10.1002/pen.760211003

10.1002/pen.760160802

10.1002/pen.760170104

10.1002/pen.760170907

10.1002/pen.760201109

10.1016/0032-3861(80)90026-9

10.1002/app.1981.070260828

“Messung der Oberflachenspannung von Plastomerschmelzen Studienarbeit ” Technische Hochschule Aachen Archiv‐Nr. S 77/53 (1978).

Diakon‐Data for Design Technical Service Note DN 23 ICI (1975).

Thông tin
Thông tin xuất bản

Polymer Engineering and Science

Tập 21 Số 17

1167-1170

Thông tin tác giả