Spectral normalisation by error minimisation for prediction of conversion in solvent-free catalytic chain transfer polymerisations

Richardson, S. J.; Blakey, Idriss; Thurecht, Kristofer J.; Irvine, Derek J.; Whittaker, Andrew K.

doi:10.1039/c6ra06462k

Cited by 3 publications

(2 citation statements)

References 32 publications

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“…To apply the PCD technique, we took MMA as the research object and explored its polymerization under high pressure by controlling the pressure change. The Raman spectrum of MMA at ambient pressure is shown in Figure S1, which is consistent with previous studies . The Raman active modes are listed in Table S1.…”

Section: Resultssupporting

confidence: 88%

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Programmable Compressing and Decompressing for Controllable Polymerization: The Case of Methyl Methacrylate

Yang,

Shi,

Dong

et al. 2023

J. Phys. Chem. C

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Conventional high-pressure chemical reactions that are initiated by manual compression or decompression face critical challenges in reproducibility, as different research groups often obtain different results. In this study, we developed a new high-pressure technique termed programmable compression and decompression (PCD) in order to solve this problem. This versatile method allows us to arbitrarily adjust the pressure loading modes, including the compression and decompression rates, the amplitude, and the number of compression–decompression cycles, to explore their effects on chemical reactions. Using the polymerization of methyl methacrylate (MMA) as a model reaction, our PCD technique shows that the characteristic of the pressure-induced polymerization (PIP) of MMA is “high-pressure initiation and low-pressure polymerization”. The effects of the initiation pressure, polymerization pressure, and holding time at low pressure were confirmed by simple compression and decompression experiments. Furthermore, using the PCD technique, we set several pressure loading modes to explore the effects of the number of compression–decompression cycles, amplitude, and rate on MMA polymerization. The results show that the number of compression–decompression cycles and the amplitude significantly affect the conversion yield (CY). Our results demonstrate that the PCD technique is a convenient method for controlling high-pressure reaction conditions and provide some inspiration for future high-pressure technology.

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Section: Resultssupporting

confidence: 88%

“…The Raman spectrum of MMA at ambient pressure is shown in Figure S1, which is consistent with previous studies. 34 The Raman active modes are listed in Table S1. We focused on four modes in the range 1400−1800 cm −1 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Programmable Compressing and Decompressing for Controllable Polymerization: The Case of Methyl Methacrylate

Yang,

Shi,

Dong

et al. 2023

J. Phys. Chem. C

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The effects of alpha irradiation on the optical reflectivity of composite polymers

Chavan

Kulkarni

Lee

et al. 2022

Radiation Physics and Chemistry

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The correlation between multiple variable factors and the autocatalytic properties of cerium oxide nanoparticles based on cell viability

Shi

Bao

et al. 2018

New J. Chem.

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Spectral normalisation by error minimisation for prediction of conversion in solvent-free catalytic chain transfer polymerisations

Abstract: This work provides a robust method to determine spectral normalization points in reactions with no known constant responses.

Cited by 3 publications

References 32 publications

Programmable Compressing and Decompressing for Controllable Polymerization: The Case of Methyl Methacrylate

Programmable Compressing and Decompressing for Controllable Polymerization: The Case of Methyl Methacrylate

The effects of alpha irradiation on the optical reflectivity of composite polymers

The correlation between multiple variable factors and the autocatalytic properties of cerium oxide nanoparticles based on cell viability

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