Temperature-dependent dynamic moduli of Parylene-C columnar microfibrous thin films

被引：8
|
作者：
Chindam, Chandraprakash [1 ]
Brown, Nicole R. [2 ]
Lakhtakia, Akhlesh [1 ]
Awadelkarim, Osama O. [1 ]
Orfali, Wasim [3 ]
机构：
[1] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA 16802 USA
[2] Penn State Univ, Dept Agr & Biol Engn, University Pk, PA 16802 USA
[3] Taibah Univ, Coll Engn, Architectural Engn Dept, POB 344, Al Madina Al Munawara, Saudi Arabia
来源：
POLYMER TESTING | 2016年 / 53卷
基金：
美国国家科学基金会;
关键词：
Parylene C; Dynamic mechanical analysis; Storage modulus; Loss modulus; Microfibrous film; GLASS-TRANSITION TEMPERATURE; ELASTIC-MODULUS; MORPHOLOGY; VAPOR;
D O I：
10.1016/j.polymertesting.2016.05.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Columnar microfibrous thin films (mu FTFs) of the polymer Parylene C with different microfiber inclination angles were fabricated using a physicochemical vapor deposition process whereby a collimated flux of hot monomers is obliquely directed towards a planar substrate. Each mu FTF was then subjected to cyclic elastic loading in one of two orthogonal directions lying wholly in the substrate plane: either (i) normal or (ii) parallel to the morphologically significant plane of the HE Dynamic storage and loss moduli were determined in the 1-80 Hz frequency range for temperatures between -40 degrees C and 125 degrees C. For all columnar mu FTFs, the storage and loss moduli for normal loading did not exceed their counterparts for parallel loading. All columnar mu FTFs were found to be softer than a bulk film of Parylene C. In both bulk and columnar forms, Parylene C was found to be rheologically not simple. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：89 / 97
页数：9
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