New methods in polymer brush synthesis: Non-vinyl-based semiflexible and rigid-rod polymer brushes

Reese, Caleb J.; Boyes, Stephen G.

doi:10.1016/j.progpolymsci.2021.101361

Cited by 22 publications

(16 citation statements)

References 159 publications

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“…24,25 Unfortunately, all these attempts have failed so far for the lack of spatiotemporal resolution. 26−28 For example, although TGA and mechanical property measurements could estimate the overall performances of polymers at a macroscopic scale, it is impossible to provide direct information for chemical changes in the backbone of polymers; 29,30 Spectroscopic analyses, such as infrared, Raman, nuclear magnetic resonance, and X-ray photoelectron spectroscopies, can be used to provide some information on polymer functional groups. 31−35 However, these techniques failed to provide three-dimensional evaluation on polymer aging.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Currently, a number of conventional techniques, such as thermogravimetric analysis (TGA), mechanical property measurements, and spectroscopic analysis, have been attempted to investigate different aging pathways of polymers. , Unfortunately, all these attempts have failed so far for the lack of spatiotemporal resolution. − For example, although TGA and mechanical property measurements could estimate the overall performances of polymers at a macroscopic scale, it is impossible to provide direct information for chemical changes in the backbone of polymers; , Spectroscopic analyses, such as infrared, Raman, nuclear magnetic resonance, and X-ray photoelectron spectroscopies, can be used to provide some information on polymer functional groups. − However, these techniques failed to provide three-dimensional evaluation on polymer aging. Therefore, it is a long-standing challenge to distinguish and quantify the different aging pathways of polymers with high spatiotemporal resolution.…”

Section: Introductionmentioning

confidence: 99%

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Three-Dimensional Fluorescent Imaging to Identify Multi-Paths in Polymer Aging

et al. 2021

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It is of great significance to disclose the diverse aging pathways for polymers under multiple factors, so as to predict and control the potential aging evolution. However, the current methods fail to distinguish multiple pathways (multi-paths) of polymer aging due to the lack of spatiotemporal resolution. In this work, using polyimide as a model polymer, the hydroxyl, carboxyl, and amino groups from the polyimide aging process were labeled using specific fluorescent probes through boron-oxygen, imine, and thiourea linkages, respectively. When the excitation and emission wavelengths of each fluorescent probe were controlled, the multi-paths in polyimide aging can be visualized individually and simultaneously in three-dimensional fluorescent images. The overall aging process under hydrothermal treatment was destructured into the pyrolysis and hydrolysis pathways. Three-dimensional dynamic studies discovered that the increased humidity, along with the decreased oxygen content, could hamper the pyrolysis reaction and accelerate the hydrolysis reaction, leading to severe degradation of the overall polyimide aging. More importantly, the oxygen showed a higher regulation coefficient in accelerating the pyrolysis reaction, than the water vapor in motivating the hydrolysis reactions. Such a multidimensional identification methodology is able to guide the long-term use of polymers and control their aging process to a harmless direction in advance by tuning the contents of oxygen and water vapor.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Fluorescent Imaging to Identify Multi-Paths in Polymer Aging

et al. 2021

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“…Despite the 'smart' function of self-oscillating polymer brushes, the research interest on it is far less than that of stimulation-responsive polymer brushes. [62][63][64][65][66][67][68][69] With a view to arousing more research interest in related aspects, this paper aims to systematically introduce the research progress of selfoscillating polymer brushes and summarizes its response mechanisms and classication. Additionally, the future prospective is also discussed.…”

Section: Introductionmentioning

confidence: 99%

Research progress in self-oscillating polymer brushes

et al. 2022

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“…16,17 As an alternative, the attachment of polymer brushes to surfaces can provide films having greater bio-stability, biosafety, and variability in composition and structure. [18][19][20] In this respect, common thermosensitive polymers, such as poly(N-isopropylacrylamide) (PNIPAm), poly(N-vinylcaprolactam) (PNVCL), poly(methyl vinyl ether) (PMVE), poly(N,N-diethyl acrylamide) (PDEAAM) may be good candidates. 21 The balance of hydrophilic and hydrophobic groups in these polymers leads to chain folding behavior similar to that of some natural peptides.…”

Section: Introductionmentioning

confidence: 99%