Relaxation behavior of poly(lactic acid)/poly(butylene succinate) blend and a new method for calculating its interfacial tension
Relaxation behavior of poly(lactic acid)/poly(butylene succinate) blend and a new method for calculating its interfacial tension
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聚乳酸/聚丁二酸丁二醇酯共混物的松弛行为及其界面张力计算新方法
DOI：
10.1002/app.36910
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发表时间：
2012-09
影响因子：
3
通讯作者：
Huang Han-Xiong
中科院分区：
文献类型：
--
作者：
Xu Lin-Qiong;Huang Han-Xiong
利用挤出机制备了80/20(w/w)聚乳酸/聚丁二酸丁二醇酯(PLA/PBS)生物质共混物。所制备的共混物呈现典型的液滴-基质形态。用储能模量法、损耗正切法和Cole-Cole图研究了共混物的松弛行为。在低频区，共混物的储能模量和损耗正切曲线上的弹性指数高于纯组分，并且在Cole-Cole图上明显偏离半圆形。这些特征被认为是由变形液滴的松弛引起的。损耗正切曲线对变形液滴的松弛行为比储能系数曲线更敏感。此外，还将共混物的复粘度分解为实部和虚部，以进一步分析其松弛行为。在粘度虚部曲线上定义了共混物的三个松弛时间。证明了虚部曲线中低频区峰值对应的频率的倒数等于从储能弹性系数曲线得到的共混物的最长松弛时间。根据这一结果，提出了一种新的计算共混物中聚乳酸和PBS之间界面张力的方法，其界面张力为3.7mN/m。
The biomass-based blend of 80/20 (w/w) poly(lactic acid)/poly(butylene succinate) (PLA/PBS) is prepared using an extruder. The prepared blend shows a typical droplet-matrix morphology. The relaxation behavior of the blend is investigated in terms of storage modulus, loss tangent, and Cole–Cole plots. In the low frequency region, the blend exhibits higher elastic indices than the pure components on the storage modulus and loss tangent curves, and remarkable deviation from a semicircular shape on the Cole–Cole plot. These features are thought to arise from the relaxation of the deformed droplets. The loss tangent curve is more sensitive to the relaxation behavior of the deformed droplets than the storage modulus curve. Moreover, the complex viscosity of the blend is separated into real and imaginary parts to further analyze its relaxation behavior. Three relaxation times for the blend are defined on the curve of the imaginary part of the viscosity. It is demonstrated that the reciprocal of the frequency corresponding to the peak in the low frequency region on the imaginary part curve is equal to the longest relaxation time of the blend obtained from the storage modulus curve. Based on this result, a new method is proposed to calculate the interfacial tension between the PLA and PBS in the blend, which is 3.7 mN/m. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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影响因子：
4.6
作者：
J. Peón;J. Vega;B. Amo;J. Martínez-Salazar
通讯作者：
J. Peón;J. Vega;B. Amo;J. Martínez-Salazar
影响因子：
2.3
作者：
PALIERNE, JF
通讯作者：
PALIERNE, JF
影响因子：
3
作者：
Tadashi Yokohara;Kenzo Okamoto;M. Yamaguchi
通讯作者：
Tadashi Yokohara;Kenzo Okamoto;M. Yamaguchi
DOI：
10.1081/mc-100101420
发表时间：
1999-05
期刊：
Journal of Macromolecular Science-reviews in Macromolecular Chemistry and Physics
影响因子：
--
作者：
I. Arvanitoyannis
通讯作者：
I. Arvanitoyannis
影响因子：
3.1
作者：
Li, Ke;Peng, Jun;Huang, Han-Xiong
通讯作者：
Huang, Han-Xiong