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Towards Chemical Length-Scale Contro...

Schilling, Cody Alan.

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Towards Chemical Length-Scale Control in Additive Manufacturing: Innovations in Polymer Material Design and Technology.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Towards Chemical Length-Scale Control in Additive Manufacturing: Innovations in Polymer Material Design and Technology./
Author:	Schilling, Cody Alan.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	123 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
Contained By:	Dissertations Abstracts International85-04B.
Subject:	Chemistry. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30691234
ISBN:	9798380609746

Towards Chemical Length-Scale Control in Additive Manufacturing: Innovations in Polymer Material Design and Technology.
Schilling, Cody Alan.

Towards Chemical Length-Scale Control in Additive Manufacturing: Innovations in Polymer Material Design and Technology. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 123 p.

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2023.

Additive manufacturing (AM) is a growing set of techniques that offer distinct advantages as compared to traditional, often subtractive, manufacturing processes. The ability to rapidly iterate through prototype parts through use of computer aided design, coupled with the freeform material deposition capabilities inherent to AM, has enabled the rapid preparation of designs with precise geometries and the ability to leverage a variety of chemistries, even within the same print. While the field has expanded rapidly in the last few decades, a challenge we have undertook is to realize length-scale chemical control in the additive manufacturing of polymer materials. Inspired by the hierarchical structure present in natural materials like wood and bone that take advantage of controlled spatial distribution of different materials across a variety of chemical length-scales, we sought to address similar ideas in the realm of polymer AM. This thesis aims to demonstrate both new materials and AM towards accessing similar synthetic control of materials as the bioinspired examples. Chapter 2 of this thesis details our work as it relates to our understanding of the nonlinear behavior of simple 3D-printed elastomers as a result of light intensity used to print the materials. Using the same chemical system, we were able to modulate material properties from which we developed a hyperviscoelasticity model bridging the observed mechanical properties to polymer chain level interactions. Chapters 3 and 4 discuss our efforts towards the synthesis of new stress sensing polymer materials. We report the synthesis of chain-centered mechanophore containing polymers that are capable of undergoing scission via mechanochemically induced retro-Diels-Alder reactions using a new class of bridged, alicyclic diimide mechanophores based on diimides derived from bicyclo[2.2.2]-oct-7-ene dianhydride cores. Additionally, we report our efforts towards the synthesis of chain-centered mechanophore block copolymers (BCPs) to investigate polymer microstructural effects on mechanochemical activation efficiency. Ultimately, we found that the controlled synthesis of BCPs with acceptable molecular weights for mechanical activation to be challenging and potential solutions are also presented. Lastly, in chapter 5, we discuss the use of rapidly degradable poly(vinyl ester sulfone)s as composite materials for powder-melt extrusion of thermoplastics, towards 3D-printing of gradient density materials. We address the challenges in synthesis as well as printing constraints inherent to these systems.

ISBN: 9798380609746Subjects--Topical Terms:

516420
Chemistry.
Subjects--Index Terms:

Additive manufacturing

Towards Chemical Length-Scale Control in Additive Manufacturing: Innovations in Polymer Material Design and Technology.
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500 $a Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
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502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2023.
520 $a Additive manufacturing (AM) is a growing set of techniques that offer distinct advantages as compared to traditional, often subtractive, manufacturing processes. The ability to rapidly iterate through prototype parts through use of computer aided design, coupled with the freeform material deposition capabilities inherent to AM, has enabled the rapid preparation of designs with precise geometries and the ability to leverage a variety of chemistries, even within the same print. While the field has expanded rapidly in the last few decades, a challenge we have undertook is to realize length-scale chemical control in the additive manufacturing of polymer materials. Inspired by the hierarchical structure present in natural materials like wood and bone that take advantage of controlled spatial distribution of different materials across a variety of chemical length-scales, we sought to address similar ideas in the realm of polymer AM. This thesis aims to demonstrate both new materials and AM towards accessing similar synthetic control of materials as the bioinspired examples. Chapter 2 of this thesis details our work as it relates to our understanding of the nonlinear behavior of simple 3D-printed elastomers as a result of light intensity used to print the materials. Using the same chemical system, we were able to modulate material properties from which we developed a hyperviscoelasticity model bridging the observed mechanical properties to polymer chain level interactions. Chapters 3 and 4 discuss our efforts towards the synthesis of new stress sensing polymer materials. We report the synthesis of chain-centered mechanophore containing polymers that are capable of undergoing scission via mechanochemically induced retro-Diels-Alder reactions using a new class of bridged, alicyclic diimide mechanophores based on diimides derived from bicyclo[2.2.2]-oct-7-ene dianhydride cores. Additionally, we report our efforts towards the synthesis of chain-centered mechanophore block copolymers (BCPs) to investigate polymer microstructural effects on mechanochemical activation efficiency. Ultimately, we found that the controlled synthesis of BCPs with acceptable molecular weights for mechanical activation to be challenging and potential solutions are also presented. Lastly, in chapter 5, we discuss the use of rapidly degradable poly(vinyl ester sulfone)s as composite materials for powder-melt extrusion of thermoplastics, towards 3D-printing of gradient density materials. We address the challenges in synthesis as well as printing constraints inherent to these systems.
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650 4 $a Polymer chemistry. $3 3173488
650 4 $a Materials science. $3 543314
653 $a Additive manufacturing
653 $a Polymer mechanochemistry
653 $a Porous polymer materials
653 $a Viscoelasticity
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710 2 $a The University of Wisconsin - Madison. $b Chemistry. $3 2049906
773 0 $t Dissertations Abstracts International $g 85-04B.
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791 $a Ph.D.
792 $a 2023
793 $a English
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