A combined fracture mechanical - rheological study to separate the contributions of hydrogen bonds and disulphide linkages to the healing of poly(urea-urethane) networks

POLYMER

卷:96

Article

Grande, A. M.¹  Bijleveld, J. C.¹  Garcia, S. J.¹  van der Zwaag, S.¹ 

[1] Delft Univ Technol, Fac Aerosp Engn, Novel Aerosp Mat, Kluyverweg 1, NL-2629 HS Delft, Netherlands

关键词: Self-healing polymer;    Fracture;    Rheology;    Stress relaxation;    Time-temperature superposition;   

DOI  :  10.1016/j.polymer.2016.05.004

来源: Elsevier

【 摘 要 】

This work presents a detailed study into the rheological properties and fracture healing behaviour of two poly(urea-urethane) polymers containing (i) hydrogen bonds and (ii) hydrogen bonds and disulphide linkages. The experimental procedure here presented using the temperature and time superposition allowed for the identification of the contribution of each reversible bond type to the network behaviour (rheology) and healing (fracture). During the experimental data analysis it was found that the same shift factors required to construct the rheological master curves from separate isothermal small-amplitude oscillatory shear (SAOS) measurements at different temperatures could also be applied to obtain a master curve for the fracture healing data as a function of healing time and temperature. This work shows therefore the apparent direct relationship between rheological response and macroscopic fracture healing. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free