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Analysis of Correlation Between Mole...

Stonecipher, Ethan,

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Analysis of Correlation Between Molecular Weight Distribution and Melt Flow Index of Polyethylene and Polypropyle Blends /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Analysis of Correlation Between Molecular Weight Distribution and Melt Flow Index of Polyethylene and Polypropyle Blends // Ethan Stonecipher.
Author:	Stonecipher, Ethan,
Description:	1 electronic resource (66 pages)
Notes:	Source: Masters Abstracts International, Volume: 85-03.
Contained By:	Masters Abstracts International85-03.
Subject:	Materials science. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30571376
ISBN:	9798380322287

Analysis of Correlation Between Molecular Weight Distribution and Melt Flow Index of Polyethylene and Polypropyle Blends /
Stonecipher, Ethan,

Analysis of Correlation Between Molecular Weight Distribution and Melt Flow Index of Polyethylene and Polypropyle Blends /Ethan Stonecipher. - 1 electronic resource (66 pages)

Source: Masters Abstracts International, Volume: 85-03.

Recycling of plastics is one of the biggest challenges facing the earth in the 21st century due to the environmental impact they have on the waste stream. One of the biggest challenges in the recycling of these materials are their incompatibility; therefore, the segregation of waste in order to repurpose them back into something useful for a second life is an important barrier to overcome. This study expands on work done in literature to correlate rheological properties of linear virgin plastics to their ¯Mw, which is useful in deducing some mechanical behaviors of the material. The benefit being the impact on industries to run cost-effective and reliable measurements using a Melt Flow Indexer to roughly determine the ratio of HDPE/PP blends if a rough estimate for ¯Mw is provided. Otherwise, a ¯Mw can be deduced with a reasonable estimate of the blend of HDPE/PP in the waste stream. This paper employs techniques such as differential scanning calorimetry, thermogravimetric analysis, melt flow indexing, and gel-permeation chromatography to investigate thermal, rheological, and mechanical properties of various blends of both virgin and post-consumer HDPE and PP over five heat histories. The introduction of blends of virgin materials expands on the literature, and post-consumer plastics provide a real-world example of how this relation holds with every day post-consumer plastics such as milk jugs, coffee jars, plastic pottery, and detergent bottles. The results show that the correlation established in literature holds for the virgin materials; however, the post-consumer plastics did not favor this relationship and was more accurately predicted using the raw data plotted against one another. This is an interesting discovery and leads to the investigation of exactly what properties affect this correlation, and if there is a predictable curve depending on the presence of additives or the spread in MFI or ¯Mw properties.

English

ISBN: 9798380322287Subjects--Topical Terms:

543314
Materials science.
Subjects--Index Terms:

Melt flow index

Analysis of Correlation Between Molecular Weight Distribution and Melt Flow Index of Polyethylene and Polypropyle Blends /
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100 1 $a Stonecipher, Ethan, $e author. $3 3823888
245 1 0 $a Analysis of Correlation Between Molecular Weight Distribution and Melt Flow Index of Polyethylene and Polypropyle Blends / $c Ethan Stonecipher.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 1 electronic resource (66 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 85-03.
500 $a Advisors: Pillay, Brian Committee members: Ning, Haibin; Stewart, Katherine.
502 $b M.S. $c The University of Alabama at Birmingham $d 2023.
520 $a Recycling of plastics is one of the biggest challenges facing the earth in the 21st century due to the environmental impact they have on the waste stream. One of the biggest challenges in the recycling of these materials are their incompatibility; therefore, the segregation of waste in order to repurpose them back into something useful for a second life is an important barrier to overcome. This study expands on work done in literature to correlate rheological properties of linear virgin plastics to their ¯Mw, which is useful in deducing some mechanical behaviors of the material. The benefit being the impact on industries to run cost-effective and reliable measurements using a Melt Flow Indexer to roughly determine the ratio of HDPE/PP blends if a rough estimate for ¯Mw is provided. Otherwise, a ¯Mw can be deduced with a reasonable estimate of the blend of HDPE/PP in the waste stream. This paper employs techniques such as differential scanning calorimetry, thermogravimetric analysis, melt flow indexing, and gel-permeation chromatography to investigate thermal, rheological, and mechanical properties of various blends of both virgin and post-consumer HDPE and PP over five heat histories. The introduction of blends of virgin materials expands on the literature, and post-consumer plastics provide a real-world example of how this relation holds with every day post-consumer plastics such as milk jugs, coffee jars, plastic pottery, and detergent bottles. The results show that the correlation established in literature holds for the virgin materials; however, the post-consumer plastics did not favor this relationship and was more accurately predicted using the raw data plotted against one another. This is an interesting discovery and leads to the investigation of exactly what properties affect this correlation, and if there is a predictable curve depending on the presence of additives or the spread in MFI or ¯Mw properties.
546 $a English
590 $a School code: 0005
650 4 $a Materials science. $3 543314
650 4 $a Polymer chemistry. $3 3173488
650 4 $a Plastics. $3 649803
653 $a Melt flow index
653 $a Molecular weight
653 $a Polyethylene
653 $a Polypropylene
653 $a Blends
690 $a 0794
690 $a 0795
690 $a 0495
710 2 $a The University of Alabama at Birmingham. $b Materials Engineering. $e degree granting institution. $3 3823889
720 1 $a Pillay, Brian $e degree supervisor.
773 0 $t Masters Abstracts International $g 85-03.
790 $a 0005
791 $a M.S.
792 $a 2023
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30571376