An Effective On-line Polymer Characterization Technique by Using SALS Image Processing Software and Wavelet Analysis

Abstract

This paper describes an effective on-line polymer characterization technique by using small-angle light-scattering (SALS) image processing software and wavelet analysis. The phenomenon of small-angle light scattering has been applied to give information about transparent structures on morphology. Real-time visualization of various scattered light image and light intensity matrices is performed by the optical image real-time processing software for SALS. The software can measure the signal intensity of light scattering images, draw the frequency-intensity curves and the amplitude-intensity curves to indicate the variation of the intensity of scattered light in different processing conditions, and estimate the parameters. The current study utilizes a one-dimensional wavelet to delete noise from the original SALS signal and estimate the variation trend of maximum intensity area of the scattered light. So, the system brought the qualitative analysis of the structural information of transparent film success.

In‐process Measurements for Reactive Extrusion Monitoring and Control

“…It was used together with rheology to study start-up flows in a rheometer and demonstrate that the characteristic overshoot of the first normal stress difference (N 1 ) of uncompatibilized and compatibilized blends is similar, but shifted to shorter times for the latter, thus indicating a faster breakup process [21]. However, the technique has been rarely used in extrusion [22][23][24][25]. Teixeira et al [20] showed that while polarized optical microscopy -up for in-process measurement of the average residence time and residence time distribution at a specific location of the extruder.…”

Ultrasonic Studies of Polyvinylchloride in Cyclohexanone and 1,4-Dioxane

“…The viscosity of dilute polyvinylchloride solution was observed by Takeda and Endo [9]. Similarly, Xiang et al [10] explored an effective means of characterizing structural changes of PVC particles during gelation and fusion of PVC plastisols with small-angle light scattering (SALS). Presently, we have carried out the investigation on PVC using two binary systems: polyvinylchloridecyclohexanone and polyvinylchloride -1,4-dioxane to determine the density (ρ) and ultrasonic velocity (v) at different concentration of PVC at constant temperature 25 0 C (298 K).…”