Temperature gradients in the channels of a single-screw extruder

We used a temperature‐sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved doping polycarbonate with perylene and detecting fluorescence with an optical sensor that accesses a standard instrumentation port on a barrel...

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Published inPolymer engineering and science Vol. 44; no. 11; pp. 2148 - 2157
Main Authors Bur, Anthony J., Roth, Steven C., Spalding, Mark A., Baugh, Daniel W., Koppi, Kurt A., Buzanowski, Walter C.
Format Journal Article
LanguageEnglish
Published New York Society of Plastics Engineers, Inc 01.11.2004
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Blackwell Publishing Ltd
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Abstract We used a temperature‐sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved doping polycarbonate with perylene and detecting fluorescence with an optical sensor that accesses a standard instrumentation port on a barrel of a single‐screw extruder. The sensor's confocal optics design permits fluorescence intensity measurements as a function of position. Using a previously established calibration function, temperature and temperature gradients were obtained from the measured fluorescence. Because the origin of the measurement is the fluorescent dye molecule that is soluble in the resin, this method allows temperature measurement of the polymer without interference from the surrounding metal parts. With the sensor looking over the screw, temperature profiles from the barrel wall to the core of the screw were obtained as a function of screw speed, screw design and resin melt flow rate. Polym. Eng. Sci. 44:2148–2157, 2004. © 2004 Society of Plastics Engineers. This paper is a contribution from the National Institute of Standards and Technology, and, thus, is not subject to copyright in the United States.
AbstractList We used a temperature-sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved doping polycarbonate with perylene and detecting fluorescence with an optical sensor that accesses a standard instrumentation port on a barrel of a single-screw extruder. The sensor's confocal optics design permits fluorescence intensity measurements as a function of position. Using a previously established calibration function, temperature and temperature gradients were obtained from the measured fluorescence. Because the origin of the measurement is the fluorescent dye molecule that is soluble in the resin, this method allows temperature measurement of the polymer without interference from the surrounding metal parts. With the sensor looking over the screw, temperature profiles from the barrel wall to the core of the screw were obtained as a function of screw speed, screw design and resin melt flow rate. [PUBLICATION ABSTRACT]
We used a temperature‐sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved doping polycarbonate with perylene and detecting fluorescence with an optical sensor that accesses a standard instrumentation port on a barrel of a single‐screw extruder. The sensor's confocal optics design permits fluorescence intensity measurements as a function of position. Using a previously established calibration function, temperature and temperature gradients were obtained from the measured fluorescence. Because the origin of the measurement is the fluorescent dye molecule that is soluble in the resin, this method allows temperature measurement of the polymer without interference from the surrounding metal parts. With the sensor looking over the screw, temperature profiles from the barrel wall to the core of the screw were obtained as a function of screw speed, screw design and resin melt flow rate. Polym. Eng. Sci. 44:2148–2157, 2004. © 2004 Society of Plastics Engineers. This paper is a contribution from the National Institute of Standards and Technology, and, thus, is not subject to copyright in the United States.
We used a temperature-sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved doping polycarbonate with perylene and detecting fluorescence with an optical sensor that accesses a standard instrumentation port on a barrel of a single-screw extruder. The sensor's confocal optics design permits fluorescence intensity measurements as a function of position. Using a previously established calibration function, temperature and temperature gradients were obtained from the measured fluorescence. Because the origin of the measurement is the fluorescent dye molecule that is soluble in the resin, this method allows temperature measurement of the polymer without interference from the surrounding metal parts. With the sensor looking over the screw, temperature profiles from the barrel wall to the core of the screw were obtained as a function of screw speed, screw design and resin melt flow rate. Polym. Eng. Sci. 44:2148-2157, 2004. © 2004 Society of Plastics Engineers. (†)
The temperature of a molten polymer stream is a key processing prameters for many processes. We used a temperature-sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved doping polycarbonate with perylene and detecting fluorescence with an optical sensor that accesses a standard instrumentation port on a barrel of a single-screw extruder. The sensor's confocal optics design permits fluorescence intensity measurements as a function of position. Using a previously established calibration function, temperature and temperature gradients were obtained from the measured fluorescence. Because the origin of the measurement is the fluorescent dye molecule that is soluble in the resin, this method allows temperature measurement of the polymer without interference from the surrounding metal parts. With the sensor looting over the screw, temperature profiles from the barrel wall to the core of the screw were obtained as a function of screw speed, screw design and resin melt flow rate.
Audience Academic
Author Buzanowski, Walter C.
Baugh, Daniel W.
Bur, Anthony J.
Spalding, Mark A.
Koppi, Kurt A.
Roth, Steven C.
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Issue 11
Keywords Fluorescent tracer
Process control
Optical sensor
Temperature control
Measurement method
Single screw extruder
Perylene
Experimental study
Polycarbonate
Extrusion molding
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References_xml – reference: A. J. Bur, M. G. Vangel, and S. Roth, Applied Spectroscopy, 56, 174 (2002).
– reference: J. A. Myers and R. A. Barr, SPE ANTEC Tech. Papers, 48, 154 (2002).
– reference: T. A. Hogan, M. A. Spalding, K. S. Cho, and C. I. Chung, SPE ANTEC Tech. Papers, 48, 384 (2002).
– reference: K. B. Migler and A. J. Bur, Polym. Eng. Sci., 38, 213 (1998).
– reference: Z. Tadmor and I. Klein, in Engineering Principles of Plasticating Extrusion, Van Nostrand Reinhold Co., New York (1970).
– reference: S. A. Somers, M. A. Spalding, J. Dooley, and K. S. Hyun, SPE ANTEC Tech. Papers, 48, 307 (2002).
– reference: H. Kim and E. Collins, Polym. Eng. Sci., 11, 83 (1971).
– reference: T. W. McCullough and B. Hilton, SPE ANTEC Tech. Papers, 38, 927 (1992).
– reference: A. L. Kelly, E. C. Brown, and P. D. Coates, SPE ANTEC Tech. Papers, 49, 82 (2003).
– reference: A. J. Bur, M. G. Vangel, and S. C. Roth, Polym. Eng. Sci., 41, 1380 (2001).
– reference: M. A. Spalding, J. Dooley, K. S. Hyun, and S. R. Strand, SPE ANTEC Tech. Papers, 39, 1533 (1993).
– reference: E. C. Brown, A. L. Kelly, and P. D. Coates, SPE ANTEC Tech. Papers, 49, 77 (2003).
– reference: J. vanLeeuwen, Polym. Eng. Sci., 7, 98 (1967).
– reference: T. W. McCullough and M. A. Spalding, J. Reinforced Plastics and Composites, 16, 1622 (1997).
– reference: M. Esseghir and V. Sernas, Adv. Polym. Technol., 13, 133 (1994).
– reference: E. Haberstroh, L. Jakisch, E. Henssge, and P. Schwarz, Macromolecular Materials and Engineering, 287, 203 (2002).
– reference: C. Maier, Polym. Eng. Sci., 36, 1502 (1996).
– reference: M. A. Spalding and K. S. Hyun, SPE ANTEC Tech. Papers, 49, 229 (2003).
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  year: 1967
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Snippet We used a temperature‐sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved...
We used a temperature-sensitive fluorescent dye, perylene, to monitor the true resin temperature during extrusion of polycarbonate. The measurement involved...
The temperature of a molten polymer stream is a key processing prameters for many processes. We used a temperature-sensitive fluorescent dye, perylene, to...
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SubjectTerms Analysis
Applied sciences
Chemical engineering
Chemical processes
Exact sciences and technology
Extruders
Extrusion moulding
Fluorescence
Machinery and processing
Moulding
Plastics
Polycarbonate resins
Polymer industry, paints, wood
Technology of polymers
Temperature
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Title Temperature gradients in the channels of a single-screw extruder
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