&lt;title&gt;Characterization of polymer composites by fiber optic Fourier transform Raman spectroscopy&lt;/title&gt;

Farquharson, Stuart; Bhat, Sanmitra A.; Osbaldiston, Richard; DiTaranto, Marie B.; Smith, Wayne; Rose, Jennifer; Liu, Yongming; Shaw, Montgomery T.

doi:10.1117/12.337478

Cited by 3 publications

(2 citation statements)

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“…One of the most attractive applications that fiber‐optics technology has found in the last decades is in the Raman spectroscopy (see Section 3.9.6) area. As a matter of fact, most of the monitoring applications of the Raman technique use fiber‐optics probes 221–232. There are a number of patents regarding fiber probes for specific use in Raman scattering 233, 234.…”

Section: On‐line Sensors For Polymer Property Trajectory Monitoringmentioning

confidence: 99%

A Critical Overview of Sensors for Monitoring Polymerizations

Fonseca

Dubé

Penlidis

2009

Macro Reaction Engineering

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The available on‐line and in‐line sensor technologies developed for polymerization reactors from 1990 until today are discussed and critically reviewed. About 600 references are included, which evidence the growth in sensor technology in the last two decades. Sensors for operational parameters in polymer reactors (i.e. temperature, pressure, level and flow) as well as sensors for polymer property monitoring (i.e. calorimetry, chromatography and spectroscopy, among others) are included. Complementary topics such as state estimation, multivariate statistical methods, fault diagnosis techniques and optimal sensor selection and location are briefly covered.

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Section: On‐line Sensors For Polymer Property Trajectory Monitoringmentioning

confidence: 99%

A Critical Overview of Sensors for Monitoring Polymerizations

Fonseca

Dubé

Penlidis

2009

Macro Reaction Engineering

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“…13 Applications to automobiles, bridge supports, buildings, chemical reactor vessels, ships, and trains, are all known,4'5 but market growth remains below expectations. This is attributed to the inability to fabricate components within specifications that meet application guidelines.…”

Section: Introductionmentioning

confidence: 99%

<title>Characterization of polymer composites during autoclave manufacturing by Fourier transform Raman spectroscopy</title>

et al. 2001

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The superior engineering properties of fiber reinforced polymer matrix composites, primarily the high strength-to-weight ratio, make them suitable to applications ranging from sporting goods to aircraft components (e.g. helicopter blades). Unfortunately, consistent fabrication of components with desired mechanical properties has proven difficult, and has led to high production costs. This is largely due to the inability to monitor and control polymer cure, loosely defined as the process ofpolymer chain extension and cross-linking. Even with stringent process control, slight variations in the pre-polymer formulations (e.g. prepreg) can influence reaction rates, reaction mechanisms, and ultimately, product properties. In an effort to optimize the performance ofthermoset composites, we have integrated fiber optic probes between the plies of laminates and monitored cure by Raman spectroscopy, with the eventual goal ofprocess control. Here we present real-time measurements oftwo high performance aerospace composites cured within an industrial autoclave.

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