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In-line-measurement of the polymer m...

Noriega Escobar, Maria del Pilar.

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In-line-measurement of the polymer melting behavior in single screw extruders.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	In-line-measurement of the polymer melting behavior in single screw extruders./
作者:	Noriega Escobar, Maria del Pilar.
面頁冊數:	80 p.
附註:	Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5341.
Contained By:	Dissertation Abstracts International62-11B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3033255
ISBN:	0493460969

In-line-measurement of the polymer melting behavior in single screw extruders.
Noriega Escobar, Maria del Pilar.

In-line-measurement of the polymer melting behavior in single screw extruders. - 80 p.

Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5341.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2001.

Existing experimental techniques designed to study melting behavior of polymers inside the screw extruder suffer from limited functions or tedious procedures. All the techniques developed in the past three decades are invasive, time consuming, difficult to implement and expensive. Their invasive nature affect friction characteristics and heat transfer, significantly influencing the outcome of measured parameters. This thesis presents an in-line, non-invasive measuring technique that can accurately capture experimental data and images from inside the extruder through a small quartz window and a rigid boroscope at short response times using a highly instrumented 45 mm single screw extruder with built-in sensors. By sensing the difference in optical properties between the melt and the solid phase, the melting behavior of high density polyethylene was visualized and measured with this non-invasive technique. Using the system developed during this project we were able to observe and fully describe the mechanisms of melting in the plasticating zone of the single screw extruder. Through our experiments we were able to actually see and verify Tadmor and Pearson's melting mechanisms. In addition, we were able to see, for the first time, a melt pool formation delay due to a solid bed saturation process. Besides presenting a new optical measurement system for polymer processing, a significant contribution of this research is the better understanding of polymer melting inside extruders and plastication zone of injection molding and blow molding machines.

ISBN: 0493460969Subjects--Topical Terms:

783786
Engineering, Mechanical.

In-line-measurement of the polymer melting behavior in single screw extruders.
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500 $a Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5341.
500 $a Supervisor: Tim A. Osswald.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2001.
520 $a Existing experimental techniques designed to study melting behavior of polymers inside the screw extruder suffer from limited functions or tedious procedures. All the techniques developed in the past three decades are invasive, time consuming, difficult to implement and expensive. Their invasive nature affect friction characteristics and heat transfer, significantly influencing the outcome of measured parameters. This thesis presents an in-line, non-invasive measuring technique that can accurately capture experimental data and images from inside the extruder through a small quartz window and a rigid boroscope at short response times using a highly instrumented 45 mm single screw extruder with built-in sensors. By sensing the difference in optical properties between the melt and the solid phase, the melting behavior of high density polyethylene was visualized and measured with this non-invasive technique. Using the system developed during this project we were able to observe and fully describe the mechanisms of melting in the plasticating zone of the single screw extruder. Through our experiments we were able to actually see and verify Tadmor and Pearson's melting mechanisms. In addition, we were able to see, for the first time, a melt pool formation delay due to a solid bed saturation process. Besides presenting a new optical measurement system for polymer processing, a significant contribution of this research is the better understanding of polymer melting inside extruders and plastication zone of injection molding and blow molding machines.
520 $a Since an extruder's performance is coupled to the screw design, and the screw design, in turn, depends on the polymer melting process we are now, for the first time, able to accurately verify and modify melting models, leading to improved screws in polymer processing.
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650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Plastics Technology. $3 1023683
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