Surface and bulk structure of poly-(lactic acid) films studied by vibrational sum frequency generation spectroscopy

被引：20

作者：

Johnson, C. Magnus ^{[1
]}

Sugiharto, Albert B. ^{[1
]}

Roke, Sylvie ^{[1
]}

机构：

[1] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 449卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2007.10.061

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The surface and bulk structure of various poly-(lactic acid) (PLA) films were examined by vibrational sum frequency generation (VSFG). In contrast to linear infrared spectroscopy, the VSFG spectra show significantly different characteristics in the CH stretching region. For crystalline PLLA we observed strong surface and bulk signals, which were caused by both the order and the symmetry of the space group. Amorphous PLLA and racemically composed PDLLA were found to consist of a relatively disordered bulk. Contrary to the bulk, all surfaces studied generated VSFG signal caused by the broken symmetry at the polymer/air interface. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：191 / 195

页数：5

共 35 条

[1] Crystal structure of the α-form of poly(L-lactide) [J].

Alemán, C ;

Lotz, B ;

Puiggali, J .

MACROMOLECULES, 2001, 34 (14) :4795-4801

[2] Trichroic vibrational analysis on the α-form of poly(lactic acid) crystals using highly oriented fibers and spherulites [J].

Aou, K ;

Hsu, SL .

MACROMOLECULES, 2006, 39 (09) :3337-3344

[3] Morphological study on thermal shrinkage and dimensional stability associated with oriented poly(lactic acid) [J].

Aou, K ;

Kang, SH ;

Hsu, SL .

MACROMOLECULES, 2005, 38 (18) :7730-7735

[4] Non-linear optical spectroscopy as a novel probe for molecular chirality [J].

Belkin, MA ;

Shen, YR .

INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY, 2005, 24 (02) :257-299

[5] LIGHT WAVES AT BOUNDARY OF NONLINEAR MEDIA [J].

BLOEMBERGEN, N ;

PERSHAN, PS .

PHYSICAL REVIEW, 1962, 128 (02) :606-+

[6]

Bower D.I., 1992, VIBRATIONAL SPECTROS

[7] Temperature dependent variations in the lamellar structure of poly(L-lactide) [J].

Cho, TY ;

Strobl, G .

POLYMER, 2006, 47 (04) :1036-1043

[8]

DAVYDOV AS, 1951, THEORY LIGHT ABSORPT

[9] Tissue engineering - Current challenges and expanding opportunities [J].

Griffith, LG ;

Naughton, G .

SCIENCE, 2002, 295 (5557) :1009-+

[10] FORMULAS FOR THE ANALYSIS OF SURFACE SUM-FREQUENCY GENERATION SPECTRUM BY CH STRETCHING MODES OF METHYL AND METHYLENE GROUPS [J].

HIROSE, C ;

AKAMATSU, N ;

DOMEN, K .

JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (02) :997-1004

← 1 2 3 4 →