Revealing the impact of ageing on a flame retarded PLA
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- 作者：Nicolas Lesaffre ; Sé ; verine Bellayer ; Gaë ; lle Fontaine ; Maude Jimenez ; maude.jimenez@univ-lille1.fr" class="auth_mail" title="E-mail the corresponding author ; Serge Bourbigot
- 关键词：Polylactic acid (PLA) ; Flame retardancy ; Ageing ; Degradation ; Hydrolysis
- 刊名：Polymer Degradation and Stability
- 出版年：2016
- 出版时间：May 2016
- 年：2016
- 卷：127
- 期：Complete
- 页码：88-97
- 全文大小：2121 K
文摘
Effect of accelerated ageing on neat and flame retarded (FR) polylactide (PLA) has been investigated. The influence of temperature and relative humidity on (i) the visual aspect, (ii) the fire performances, (iii) the molecular mass and (iv) the thermal properties of the formulations has been evaluated. The flame retardant (FR) properties of samples before and after ageing were compared using Limiting Oxygen Index (LOI) and Mass Loss Calorimetry (MLC). It was reported that degradation of PLA, mainly driven by hydrolysis phenomenon, is accelerated in presence of FR fillers (melamine and ammonium polyphosphate). This is even more pronounced when an organomodified montmorillonite is added. However the FR properties are enhanced after ageing due to the physicochemical of the flame retarded materials (e.g. migration of the flame retardants, decrease of the molecular mass…).