Isothermal melt crystallization behavior of neat poly(L-lactide) (PLLA) and PLLA/organically modified layered silicate (OMLS) nanocomposite studied by two-dimensional (2D) correlation spectroscopy

被引：11

作者：

Ando, Yohei ^{[1
]}

Sato, Harumi ^{[2
]}

Shinzawa, Hideyuki ^{[3
]}

Okamoto, Masami ^{[4
]}

Noda, Isao ^{[5
]}

Ozaki, Yukihiro ^{[2
]}

机构：

[1] Nitto Denko Corp, Funct Design Technol Ctr, Toyohashi, Aichi 4413094, Japan

[2] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda, Hyogo 6691337, Japan

[3] Natl Inst Adv Ind Sci & Technol, Nagoya, Aichi 4638560, Japan

[4] Toyota Technol Inst, Grad Sch Engn, Aichi 4688511, Japan

[5] Procter & Gamble Co, W Chester, OH 45069 USA

来源：

VIBRATIONAL SPECTROSCOPY | 2012年 / 60卷

关键词：

Infrared (IR) spectroscopy; Poly(L-lactide)(PLLA); Isothermal crystallization; Nanocomposite; Generalized two-dimensional (2D) correlation spectroscopy; MECHANICAL-PROPERTIES; BLENDS; CLAY; STEREOCOMPLEX;

D O I：

10.1016/j.vibspec.2012.01.021

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Isothermal melt crystallization behavior of neat poly(L-lactide) (PLLA) and PLLA/organically modified layered silicate (OMLS)nanocomposite was studied by using time-dependent infrared (IR) spectroscopy and transmission electron microscopy (TEM). Sets of time-dependent IR spectra reflecting the crystallization from the melt of the neat PLLA and PLLA/OMLS nanocomposite were collected at 105 C. Fine details of the crystallization behaviors were analyzed by two-dimensional (2D) correlation spectroscopy, and significant differences in the crystallization behaviors depending on the presence of OMLS were revealed. Namely, it was found that the crystalline lamellae of the PLLA nanocomposite grow along the layered silicate, while the orientation of the neat PLLA resulted in more disordered orientation because of the absence of the OMLS. The result derived from the 2D correlation analysis of the time-dependent IR spectra of PLLA samples showed good agreement with corresponding TEM images. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：158 / 162

页数：5

共 33 条

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[32] Direct melt intercalation of polylactide chains into nano-galleries: Interlayer expansion and nano-composite structure
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Okamoto, Masami
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[33] Structural changes and crystallization dynamics of poly(L-lactide) during the cold-crystallization process investigated by infrared and two-dimensional infrared correlation spectroscopy
Zhang, JM
Tsuji, H
Noda, I
Ozaki, Y
[J]. MACROMOLECULES, 2004, 37 (17) : 6433 - 6439

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