Poly(butylene terephthalate)/montmorillonite nanocomposites: Effect of montmorillonite on the morphology, crystalline structure, isothermal crystallization kinetics and mechanical properties

被引：21

作者：

Kalkar, Arun K. ^{[1
]}

Deshpande, Vineeta D. ^{[1
]}

Vatsaraj, Bhakti S. ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Phys, Bombay 400019, Maharashtra, India

来源：

THERMOCHIMICA ACTA | 2013年 / 568卷

关键词：

Poly(butylene terephthalate); Polymer nanocomposites; Crystallization kinetics; MMT; Regime kinetics; Mechanical properties; Lauritzen Z test; REGIME-III CRYSTALLIZATION; WALL CARBON NANOTUBES; NONISOTHERMAL CRYSTALLIZATION; SILICATE NANOCOMPOSITES; CLAY NANOCOMPOSITES; TEREPHTHALATE)/CLAY NANOCOMPOSITES; POLYMER CRYSTALLIZATION; ORIENTATION BEHAVIOR; ELECTRON-MICROSCOPY; NUCLEATION ACTIVITY;

D O I：

10.1016/j.tca.2013.06.019

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Nanocomposites (PCNs), based on poly(butylene terephthalte) (PBT) and organoclay (Cloisite-15A) MMT were prepared by melt intercalation compounding process. The nanoscale dispersion and the micro-crystal structure studied qualitatively using; X-ray diffraction (XRD) and electron microscopy (SEM, TEM and AFM). The XRD results indicated that the crystal size is highly dependent on the crystallization temperature. The isothermal crystallization kinetics of PBT in PCNs analysis indicated that the overall crystallization of PBT involved heterogeneous nucleated three-dimensional spherical primary crystallization growth process. The crystallization rate, however, is dependent on the PCN-composition, crystallization temperature and the dispersion state of clay in PCNs. Further analysis, based on Hoffman-Lauritzen theory revealed that the neat PBT and PBT in PCNs crystallization follow regime-II kinetics for temperature 195 degrees C-205 degrees C and enters the regime-III kinetics in lower T-C range, 185 degrees C-195 degrees C. The improvement in mechanical properties is highly dependent on the level of clay exfoliation in PBT matrix. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：74 / 94

页数：21

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