A systematic study of the healing process of polymers with different chemical composition, structure and properties is carded out. It is shown that welding can be due to a number of physical and/or chemical factors. Diffusion alone leads to relatively weak welding under the selected conditions. A jump is observed in the temperature dependence of the shear stress of Kepton-H and Upilex-R. The increase of the activation energy is explained by chemical reactions taking place at the contacting surfaces. For the first time the healing process is carded out at temperatures below the glass transition temperature. In this way, the contribution of the physical processes to the healing is distinguished from that of the chemical processes.
Посилання на статтю:
Study of the healing process of polymers with different chemical structure and chain mobility / Nadka Avramova // Polymer. – 1993. – Vol 34. – P. 1904-1907.