Nondestructive Probing of Mechanical Anisotropy in Polyimide Films on Nanoscale

被引：22

作者：

Gomopoulos, N. ^{[2
]}

Saini, G. ^{[3
]}

Efremov, M. ^{[1
]}

Nealey, P. F. ^{[1
]}

Nelson, K. ^{[3
]}

Fytas, G. ^{[2
,4
,5
,6
]}

机构：

[1] Univ Wisconsin, Dept Chem & Biol Chem, Madison, WI 53706 USA

[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[3] MIT, Dept Chem, Cambridge, MA 02139 USA

[4] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[5] Univ Crete, Dept Mat Sci, Iraklion 77110, Greece

[6] FORTH, Iraklion 77110, Greece

来源：

MACROMOLECULES | 2010年 / 43卷 / 03期

基金：

美国国家科学基金会;

关键词：

STIMULATED THERMAL SCATTERING; ISOTROPIC ELASTIC-MODULI; THIN-FILMS; BRILLOUIN-SCATTERING; MOLECULAR-ORIENTATION; GLASS-TRANSITION; LIGHT-SCATTERING; DIFFUSIVITY; POLYMERS; SILICON;

D O I：

10.1021/ma902509y

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The present work demonstrates the first application of Brillouin light scattering to probe elastic excitations in highly anisotropic polymer thin films. Both the in-plane and out-of-plane longitudinal and shear moduli of poly(biphenyl dianhydride-p-phenylenediamine) (BPDA-PDA) polyimide were accessed by utilizing the transmission and reflection scattering geometries [Macromolecules 2007, 40, 7283; 2009, 42, 7164]. A series of thin BPDA-PDA polyimide coatings on transparent substrates with thickness in the range of 0.1-20 mu m were explored, and no noticeable trend in elastic properties and mechanical anisotropy with thickness has been found, in conformity with earlier results. The earlier studies were restricted to thick films (> 1.5 mu m) and to the in-plane moduli.

引用

页码：1551 / 1555

页数：5

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