期刊
POLYMER DEGRADATION AND STABILITY
卷 121, 期 -, 页码 230-237出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2015.09.012
关键词
Poly(lactic acid); Annealing; Zinc phenylphosphonate; Viscoelasticity; Time-temperature superposition principle; Creep behavior
资金
- Ministry of Science and Technology, Taiwan [MOST 102-2628-B-005-006-MY3]
In this study, the thermal crystallization, viscoelastic property, and creep behavior of poly(lactide acid)/zinc phenylphosphonate (PLA/PPZn) blends were compared with those of annealed PLA. The results revealed that PPZn exhibited an excellent nucleating effect for the crystallization of PLA. The isothermal crystallization half-time (t(1/2)) of amorphous PLA (PLA(am)) at 130 degrees C was 28.1 min, whereas all the t(1/2) values of PLA/PPZn blends were less than 1 min. In addition, the blends showed better thermal resistance than the annealed PLA. The storage modulus (E') of all the PLA/PPZn blends was higher than that of the annealed PLA at temperatures higher than the T-g of PLA. However, the modulus of rupture (MOR) of PLA/PPZn blends decreased with increasing PPZn concentration in the PLA matrix, whereas there was no noticeable difference for all the annealed PLA. Regarding the creep behavior, the predicted modulus reduction of PLA(am) was 42.9% at 60 years by time-temperature superposition principle (TTSP) method. In contrast, the reductions in modulus levels of all the PLA/PPZn blends and the annealed PLA were still less than 33% over the 60-year period. (C) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据