The effect of gamma-irradiation on morphology and properties of melt-spun poly (lactic acid)/cellulose fibers

被引：12
|
作者：
Aouat, Tassadit [1 ]
Kaci, Mustapha [1 ]
Lopez-Cuesta, Jose-Marie [2 ]
Devaux, Eric [3 ]
Mahlous, Mohamed [4 ]
机构：
[1] Univ Bejaia, Fac Technol, LMPA, Bejaia 06000, Algeria
[2] Ecole Mines Ales, C2MA, 6 Ave Clavieres, F-30319 Ales, France
[3] ENSAIT, GEMTEX, 9 Rue Ermitage, F-59100 Roubaix, France
[4] CRNA, 2 Blvd Frantz Fanon, Algiers 16000, Algeria
来源：
POLYMER DEGRADATION AND STABILITY | 2019年 / 160卷
关键词：
Fibers; Polylactide; Cellulosic fillers; Gamma irradiation; Degradation; POLY(LACTIC ACID); STERILIZATION METHODS; POLY(L-LACTIC ACID); IONIZING-RADIATION; CELLULOSE NANOWHISKERS; MECHANICAL-PROPERTIES; PLA; CRYSTALLIZATION; DEGRADATION; COMPOSITES;
D O I：
10.1016/j.polymdegradstab.2018.11.014
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The effect of gamma irradiation on both morphology and properties of neat poly(lactic acid) (PLA), PLA/microcrystalline cellulose (MCC) and PLA/cellulose nanowhiskers (CNW) fibers loaded at 1 wt% filler content was investigated in presence of PLA-grafted maleic anhydride (PLA-g-MA) used as the compatibilizer. Multifilament yarns were prepared by a melt-spinning process and subjected to gamma irradiation at various doses from 5 to 30 kGy keeping the dose rate at 1.92 kGy/11 under ambient conditions. Chemical structure, morphology and property changes induced by gamma irradiation on the samples were evaluated by several techniques considering the filler aspect ratio effect. The results showed a dose-related increase in the scission index (SI) of the irradiated samples whatever the filler size, while thermal and tensile properties significantly decreased. However, the incorporation of cellulosic fillers in PLA fibers, in particular MCC, was found to hinder the radiolytic degradation process of the irradiated samples. (C) 2018 Published by Elsevier Ltd.
引用
收藏
页码：14 / 23
页数：10
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