Connecting free volume with shape memory properties in noncytotoxic gamma-irradiated polycyclooctene

The free volume holes of a shape memory polymer have been analysed considering that the empty space between molecules is necessary for the molecular motion, and the shape memory response is based on polymer segments acting as molecular switches through variable flexibility with temperature or other stimuli. Therefore, thermomechanical analysis (TMA) and positron annihilation lifetime spectroscopy (PALS) have been applied to analyse shape recovery and free volume hole sizes in gamma irradiated polycyclooctene (PCO) samples, as a non-cytotoxic alternative to more conventional PCO crosslinked via peroxide for future applications in medicine. Thus, a first approach relating structure, free volume holes and shape memory properties in gamma irradiated PCO is presented. The results suggest that free volume holes caused by gamma irradiation in PCO samples facilitate the recovery process by improving movement of polymer chains and open t possibilities for the design and control of the macroscopic response.

Introduction [to Food Safety in the Seafood Industry: A practical guide for ISO 22000 and FSSC 22000 implementation]

The prelims comprise: * Half-Title Page * Dedication Page * Title Page * Copyright Page * Table of Contents * Foreword * Acknowledgements * Disclaimer * Introduction

Habitar sem ver: a amplificação sensorial ao longo de um percurso entre o Largo Condessa do Juncal e a Veiga de Creixomil

Dissertação de mestrado integrado em Arquitectura (área de especialização em Cultura Arquitetónica)

Appendix 1

[Appendix 1] Food Safety in the Seafood Industry: A Practical Guide for ISO 22000 and FSSC 22000 Implementation.

Susceptibility of Candida biofilms to photodynamic treatment

Dissertação de mestrado em Bioengenharia