Moisture diffusion properties of HFPE-II-52 polyimide

被引：16

作者：

Bhargava, Peeyush

Chuang, Kathy C.

Chen, Kenway

Zehnder, Alan ^{[1
]}

机构：

[1] Cornell Univ, Dept Theoret & Appl Mech, Ithaca, NY 14853 USA

[2] NASA, Glenn Res Ctr, Div Mat, Cleveland, OH USA

[3] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2006年 / 102卷 / 04期

关键词：

polyimides; diffusion; swelling; glass transition; activation energy;

D O I：

10.1002/app.24549

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Moisture diffusion properties of the polyimide HFPE-II-52 were determined using weight gain, weight loss, and swelling experiments over a temperature range of 25-200 degrees C. Below 100 degrees C, diffusivity was measured using standard weight loss and weight gain methods. Above 100 degrees C, diffusivity is found by weight loss experiments performed by placing moisture saturated samples in an oven and recording weight loss dynamically. The diffusivity of the polyimide was found to obey the Arrhenius relation over the entire range of temperature. Weight gain experiments were performed to determine the equilibrium level of moisture absorbed by the polyimide as a function of relative humidity. Swelling experiments were performed to measure swelling strain as a function of moisture absorption. (c) 2006 Wiley Periodicals, Inc.

引用

页码：3471 / 3479

页数：9

共 40 条

[1] THERMAL-EXPANSION AND SWELLING OF CURED EPOXY-RESIN USED IN GRAPHITE-EPOXY COMPOSITE-MATERIALS [J].