東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Investigating the Effects of a Mechanical and Chemical Recycling Method on the Material Properties of a Virgin Bottle-Grade Poly(Ethylene Terephthalate).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigating the Effects of a Mechanical and Chemical Recycling Method on the Material Properties of a Virgin Bottle-Grade Poly(Ethylene Terephthalate)./
作者:	Hatt, Jonathan Patrick.
面頁冊數:	1 online resource (121 pages)
附註:	Source: Masters Abstracts International, Volume: 84-03.
Contained By:	Masters Abstracts International84-03.
標題:	Materials science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29065738click for full text (PQDT)
ISBN:	9798841774358

Investigating the Effects of a Mechanical and Chemical Recycling Method on the Material Properties of a Virgin Bottle-Grade Poly(Ethylene Terephthalate).
Hatt, Jonathan Patrick.

Investigating the Effects of a Mechanical and Chemical Recycling Method on the Material Properties of a Virgin Bottle-Grade Poly(Ethylene Terephthalate). - 1 online resource (121 pages)

Source: Masters Abstracts International, Volume: 84-03.

Thesis (M.S.)--Washington State University, 2022.

Includes bibliographical references

Plastic is a material that has provided many benefits to society. Its use spans across many faucets of everyday life, from the electronics we use, to the vehicles that transport us to the packaging used to protect our food. The beginnings of its mass manufacture started without due consideration to the end-of-life plan for the material. Now, an excess volume of plastic waste exists, and the consequences have yet to be fully understood. Recycling has been introduced as a method to manage the plastic waste and has been developed into four main categories. Of these four, only mechanical recycling and chemical recycling have been designed to process this post-consumer waste into a feedstock for reuse, but their use are not without limitation. Mechanical recycling melt processes plastic by extrusion and returns the material directly to a pellet form, but the risk of degradation to the material is high. Chemical recycling depolymerizes a plastic into monomers and oligomers by the use of solvents, but requires either high energy loads or complex catalysts. This research investigates both recycling methods on a common recycled plastic, bottle-grade poly(ethylene terephthalate) (PET), to study their impacts on material property. First, the extent of degradation to the bottle-grade PET was studied over four iterations of melt processing by extrusion at 260°C. After each iteration, a decrease in the molecular weight of the plastic was measured, impacting the crystallinity, rheological and mechanical properties. Second, a bottle-grade PET was reacted in an extruder-like reactor with ethylene glycol and zinc acetate dihydrate to study depolymerization over two reaction temperatures and three reaction times. Within 8 minutes, at temperatures of 255°C and 185°C, 98% of the bottle-grade PET was depolymerized to low molecular weight oligomers. This corresponded to a decrease in melt temperature from 242°C to 162°C.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798841774358Subjects--Topical Terms:

543314
Materials science.
Subjects--Index Terms:

Chemical recyclingIndex Terms--Genre/Form:

542853
Electronic books.

Investigating the Effects of a Mechanical and Chemical Recycling Method on the Material Properties of a Virgin Bottle-Grade Poly(Ethylene Terephthalate).
LDR:03430nmm a2200421K 4500 001 2363282
005 20231121104555.5
006 m o d
007 cr mn ---uuuuu
008 241011s2022 xx obm 000 0 eng d
020 $a 9798841774358
035 $a (MiAaPQ)AAI29065738
035 $a AAI29065738
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Hatt, Jonathan Patrick. $3 3704044
245 1 0 $a Investigating the Effects of a Mechanical and Chemical Recycling Method on the Material Properties of a Virgin Bottle-Grade Poly(Ethylene Terephthalate).
264 0 $c 2022
300 $a 1 online resource (121 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: 84-03.
500 $a Advisor: Englund, Karl.
502 $a Thesis (M.S.)--Washington State University, 2022.
504 $a Includes bibliographical references
520 $a Plastic is a material that has provided many benefits to society. Its use spans across many faucets of everyday life, from the electronics we use, to the vehicles that transport us to the packaging used to protect our food. The beginnings of its mass manufacture started without due consideration to the end-of-life plan for the material. Now, an excess volume of plastic waste exists, and the consequences have yet to be fully understood. Recycling has been introduced as a method to manage the plastic waste and has been developed into four main categories. Of these four, only mechanical recycling and chemical recycling have been designed to process this post-consumer waste into a feedstock for reuse, but their use are not without limitation. Mechanical recycling melt processes plastic by extrusion and returns the material directly to a pellet form, but the risk of degradation to the material is high. Chemical recycling depolymerizes a plastic into monomers and oligomers by the use of solvents, but requires either high energy loads or complex catalysts. This research investigates both recycling methods on a common recycled plastic, bottle-grade poly(ethylene terephthalate) (PET), to study their impacts on material property. First, the extent of degradation to the bottle-grade PET was studied over four iterations of melt processing by extrusion at 260°C. After each iteration, a decrease in the molecular weight of the plastic was measured, impacting the crystallinity, rheological and mechanical properties. Second, a bottle-grade PET was reacted in an extruder-like reactor with ethylene glycol and zinc acetate dihydrate to study depolymerization over two reaction temperatures and three reaction times. Within 8 minutes, at temperatures of 255°C and 185°C, 98% of the bottle-grade PET was depolymerized to low molecular weight oligomers. This corresponded to a decrease in melt temperature from 242°C to 162°C.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Materials science. $3 543314
650 4 $a Polymer chemistry. $3 3173488
650 4 $a Chemical engineering. $3 560457
650 4 $a Mechanical engineering. $3 649730
653 $a Chemical recycling
653 $a Depolymerize
653 $a Glycolysis
653 $a Mechanical recycling
653 $a Poly(ethylene terephthalate)
653 $a Thermal degradation
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0794
690 $a 0542
690 $a 0548
690 $a 0495
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Washington State University. $b Voiland College of Engineering and Architecture. $3 3694576
773 0 $t Masters Abstracts International $g 84-03.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29065738 $z click for full text (PQDT)