Thermal effects due to variation of pressure in molten polymers

• Autorzy: Kiljański, T. , Budzyński, P. , Gałąź, R.
• Języki publikacji: EN

Abstrakty

EN

The variations of temperature during compression of molten polymers: polyethylene, methyl polymethacrylate, hard and plasticized polyvinyl chloride compounds were investigated in the range of pressure up to about 1600 bars. Their specific heat and coefficient of thermal expansion were also evaluated. The measured increase of temperature proved similar for all materials but they differ considerably from the values calculated from theoretical equation 1. It seems that eq. 1 does not take into account some phenomena which influence the thermal effects of compression but are not connected with the coefficient of thermal expansion.

Słowa kluczowe

PL

przetwarzanie polimerów; reologia; ściskanie; efekt temperaturowy

EN

polymer processing; rheometry; compression; thermal effects

• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2003
• Tom: Vol. 5, nr 4
• Strony: 58-59
• Opis fizyczny: Bibliogr. 1 poz., rys.

Twórcy

autor

Kiljański, T.

autor

Budzyński, P.

autor

Gałąź, R.

• Technical University of Łódź, Faculty of Process and Environmental Engineering, 93-005 Łódź, ul. Wólczańska 213,

Bibliografia

• (1) H. L. Toor, The energy equation for viscous flow, Ind. Eng. Chem., 1956,48 (5), 922.