摘要
本文研究了四缩水甘油醚基4,4’-二氟基二苯甲烷/4,4’-二氨基二苯砜为主的树脂在高温(100～150℃)水浸环境中的吸湿行为。测定了扩散系数、扩散活化能和平衡湿含量。用逐步回归法建立了树脂的湿含量与吸湿温度和时间的关系式,此式能较好地描述树脂的吸湿全过程。同时,还研究了树脂的吸湿机理。结果表明,在高温水作用下树脂内产生的膨胀应力引起损伤(空穴、裂缝的形成),从而增大了树脂的吸湿性。
The moisture absoption behavior of epoxy resioa based on tetraglycidyl 4, 4' -diamino-diphenyl sulfone (TGDDM/DDS) immersing in high-temperature water (100-150℃) was studied. The diffusion coefficient, diffusion activation energy and equilibrium moisture content were obtained. The relationship among the moisture content M (wt%) , temperature T (℃) and time/specimen thickness t (hr/min) was found by progressive regression method.M=b0+b1 Tt+b2 T0.2+b3t0.2+b4T0.4+b5T0.6t0.8+b6T0.4t0.(?)where b (i=1, 2,……6 ) were regression coefficients. The experiment result showedthat this equation could properly simulate the process of water diffusion.The mechanism of absorption was also studied. The swelling stress in resin, which produced on the effect of high-temperature water, induced damage (forming voids and cracks). The damage enhanced moisture absorption of resin.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1989年第5期62-67,共6页
Polymer Materials Science & Engineering
基金
航空工业部科学基金
