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MODELING THE EFFECTS OF SOLID STATE ORIENTATION ON BLOWN HIGH MOLECULAR WEIGHT HIGH DENSITY POLYETHYLENE FILMS: A COMPOSITE THEORY APPROACH

BREESE, DAVID RYAN
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1107958634

Abstract Details

2005, MS, University of Cincinnati, Engineering : Materials Science.
Polyethylene films are a major component in today’s flexible packaging and are made with the most widely used polymer in the world. The selection of polyethylene films is the direct result of their balance of cost, processing, and physical properties. To take full advantage of this balance, the effects of the operating parameters of the film fabrication process must be understood in an effort to optimize the relationship between processing and physical properties. Of particular interest to the design of most packages is controlling the degree of molecular orientation in a film. This characteristic is generally determined by selecting the proper polymer, film fabrication process (e.g. cast vs. blown), and the ideal operating conditions (cast quench rate, blown high stalk, blown in-the-pocket, etc.) to produce a film with the desired degree of orientation. For the case where extremely high degrees of uniaxial orientation are required, the fabricated film is typically oriented in a “solid state” drawing process, where the quenched film is stretched in a given direction at temperatures below that of the melting point of the polymer. During this process, the stacked lamellae that form during the film fabrication process are transformed into rigid, long fiber-like structures. The presence of these rigid structures produce films with significantly enhanced moduli, break strengths, and optical properties. The goal of this program is to characterize the films with the intent of modeling the transformation of lamellae into fibers and predicting the previously mentioned physical properties. By doing so, a connection can be formed between the polymer’s characteristics and the final film properties, resulting in the fabrication of films that are unique to the industry.
Dr. Gregory Beaucage (Advisor)
159 p.
Orientation; Polyethylene; MDO; Uniaxial stretch; High Molecular Weight; Bimodal Molecular Weight Distribution; Semi-crystalline

Recommended Citations

Citations

  • BREESE, D. R. (2005). MODELING THE EFFECTS OF SOLID STATE ORIENTATION ON BLOWN HIGH MOLECULAR WEIGHT HIGH DENSITY POLYETHYLENE FILMS: A COMPOSITE THEORY APPROACH [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1107958634

    APA Style (7th edition)

  • BREESE, DAVID. MODELING THE EFFECTS OF SOLID STATE ORIENTATION ON BLOWN HIGH MOLECULAR WEIGHT HIGH DENSITY POLYETHYLENE FILMS: A COMPOSITE THEORY APPROACH. 2005. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1107958634.

    MLA Style (8th edition)

  • BREESE, DAVID. "MODELING THE EFFECTS OF SOLID STATE ORIENTATION ON BLOWN HIGH MOLECULAR WEIGHT HIGH DENSITY POLYETHYLENE FILMS: A COMPOSITE THEORY APPROACH." Master's thesis, University of Cincinnati, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1107958634

    Chicago Manual of Style (17th edition)

ucin1107958634
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© 2005, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.