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Thermally and Mechanically Responsiv...

Versaw, Brooke Ann.

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Thermally and Mechanically Responsive Platforms for Functional Polymeric Materials.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Thermally and Mechanically Responsive Platforms for Functional Polymeric Materials./
Author:	Versaw, Brooke Ann.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	179 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
Contained By:	Dissertations Abstracts International85-06B.
Subject:	Chemistry. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30961787
ISBN:	9798380870245

Thermally and Mechanically Responsive Platforms for Functional Polymeric Materials.
Versaw, Brooke Ann.

Thermally and Mechanically Responsive Platforms for Functional Polymeric Materials. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 179 p.

Source: Dissertations Abstracts International, Volume: 85-06, Section: B.

Thesis (Ph.D.)--California Institute of Technology, 2023.

Connecting a polymer's reactivity or properties to its working environment is a grand challenge in polymer chemistry. Research towards this goal is driven both by a fundamental interest in mimicking nature's ability to create surfaces that adapt to their surroundings and a practical desire to tailor the properties of materials to the wide-ranging contexts where they find use. This thesis investigates the development of polymers that exhibit productive changes in physical properties or chemical reactivity under an applied environmental stimulus.Section I explores polymers responsive to external force. In Chapter 1, we describe the development of substituted naphthopyran mechanophores that exhibit highly tunable coloration and thermal electrocyclization kinetics following mechanical activation. Structure-mechanochemical activity relationships are first established, then applied to create elastomeric materials capable of complex multicolor or multimodal stress-sensing responses. In Chapter 2, we summarize recent developments in the rapidly growing research area of mechanically triggered molecular release. We highlight advances in both specialized and general mechanophore platforms for mechanically triggered release, introduce potential applications, and outline the knowledge gaps that will define the future of this emerging field.{A0}In Section II, we focus on polymers responsive to applied heat. Chapter 3 examines the use of masked furfuryl esters as thermally latent protecting groups for carboxylic acid-functionalized polymers. Judiciously designed masked furfuryl esters were incorporated into poly(methyl acrylate)s as functional initiators or comonomers. Subsequent thermal deprotection proceeded efficiently to afford {CE}{lstrok},{CF}{89}-telechelic poly(methyl acrylate) and poly(methyl acrylate-co-acrylic acid). The relatively mild conditions required for post-polymerization modification are particularly appealing for systems that contain other labile groups and will improve the synthetic accessibility of these functional materials.

ISBN: 9798380870245Subjects--Topical Terms:

516420
Chemistry.
Subjects--Index Terms:

Polymers responsive

Thermally and Mechanically Responsive Platforms for Functional Polymeric Materials.
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500 $a Advisor: Robb, Maxwell.
502 $a Thesis (Ph.D.)--California Institute of Technology, 2023.
520 $a Connecting a polymer's reactivity or properties to its working environment is a grand challenge in polymer chemistry. Research towards this goal is driven both by a fundamental interest in mimicking nature's ability to create surfaces that adapt to their surroundings and a practical desire to tailor the properties of materials to the wide-ranging contexts where they find use. This thesis investigates the development of polymers that exhibit productive changes in physical properties or chemical reactivity under an applied environmental stimulus.Section I explores polymers responsive to external force. In Chapter 1, we describe the development of substituted naphthopyran mechanophores that exhibit highly tunable coloration and thermal electrocyclization kinetics following mechanical activation. Structure-mechanochemical activity relationships are first established, then applied to create elastomeric materials capable of complex multicolor or multimodal stress-sensing responses. In Chapter 2, we summarize recent developments in the rapidly growing research area of mechanically triggered molecular release. We highlight advances in both specialized and general mechanophore platforms for mechanically triggered release, introduce potential applications, and outline the knowledge gaps that will define the future of this emerging field.{A0}In Section II, we focus on polymers responsive to applied heat. Chapter 3 examines the use of masked furfuryl esters as thermally latent protecting groups for carboxylic acid-functionalized polymers. Judiciously designed masked furfuryl esters were incorporated into poly(methyl acrylate)s as functional initiators or comonomers. Subsequent thermal deprotection proceeded efficiently to afford {CE}{lstrok},{CF}{89}-telechelic poly(methyl acrylate) and poly(methyl acrylate-co-acrylic acid). The relatively mild conditions required for post-polymerization modification are particularly appealing for systems that contain other labile groups and will improve the synthetic accessibility of these functional materials.
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