【摘 要】
:
The effect of heat treatment on the structure of Poly(p-phenylene benzobisoxazole) (PBO) fiber was studied by wide angle X-ray diffraction (WAXD) and differenti
【机 构】
:
Key Laboratory for Ultrafine Materials of Ministry of Education
论文部分内容阅读
The effect of heat treatment on the structure of Poly(p-phenylene benzobisoxazole) (PBO) fiber was studied by wide angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC), which results in confirmation of secondary crystallization in the heat treatment process. The effect of heat treatment on the structure and morphology of PBO fiber's surface was investigated with X-ray photoelectron spectroscopic analysis (XPS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results show that heat treatment not only has an effect on the composition of PBO fiber's surface, but also improves the microstructure of PBO fiber, makes fiber more regular.
其他文献
A semiempirical molecular dynamics model is developed to study the vibrational frequencies of uracil at very low kinetic temperature by using the Fourier transf
A generalized scheme based on the sliding mode and component synthesis vibration suppression (CSVS) method has been proposed for the rotational maneuver and vib
An experimental investigation was conducted on the laminar flow frictional characteristics of suspensions with microencapsulated phase change material (MEPCM) i
Let m be a positive integer, g (m) be the number of integers t for which 1 ≤ t ≤ m and there does not exist a positive integer n satisfying ( t = t(n) )tn+1
This paper is to study the linear minimum variance estimation for discrete- time systems. A simple approach to the problem is presented by developing re-organiz
This paper developed the dynamic feedback neural network model to solve the convex nonlinear programming problem proposed by Leung et al. and introduced subgrad
This article presents a method for real- time mapping of algal blooms in turbid coastal waters using the remote sensing reflectance of red band (Channel 1, 580-
The open loop dynamic behaviors of internal thermally coupled distillation column with four different purities (low-,moderate-, high- and very high-purity) are
To elucidate the effects of the hydro- genation and oxygenation of the boron-doped diamond (BDD) electrode on its electrochemical behaviors, the surface morphol
The dynamic balance quality of a rotating object is an important factor to maintain the stability and accuracy for motion. The azimuth of the principal axis of