Polyvinyl Butyral with Different Acetalization Degrees: Synthesis and Solubility Parameters

Wang, Chunyu; Luan, Wenwen; Zeng, Zuoxiang; Wang, Haonan; Sun, Li; Wang, James H.

doi:10.1080/00222348.2021.1971370

Cited by 9 publications

(9 citation statements)

References 38 publications

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“…Therefore, we determined the molecular structure of PVB and its aggregate structure by using gel permeation chromatography (GPC), 1 H nuclear magnetic resonance spectroscopy ( 1 H NMR), and X-ray diffraction (XRD) (Figure S5). The glass transition temperature ( T g ) of PVB was estimated at 72 °C (Figure S6), agreeing well with those reported in other literatures. − T g is the temperature at which the polymer segment starts to move, which is greatly affected by the length of the side chain. In precedent literature, the VIPS process is routinely constrained to the “hard” polymers with glass transition temperatures ( T g ) much higher than that of PVB.…”

Section: Resultssupporting

confidence: 87%

“…In a specific fabrication process, these PVA derivatives (e.g., PVB) are dissolved in good solvents (e.g., EtOH), and then exposed to water vapor, to achieve solidification (Figure S7). The vapor exchange stage can be understood as a “de-plasticizing effect” and thus the network-forming phase separation is arrested through “percolation”, , where the polymer-rich phase expels solvent/absorbs nonsolvent driven by mass transfer.…”

Section: Resultsmentioning

confidence: 99%

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Arrested Phase Separation Enables Optimal Light Management toward High-Performance Passive Radiative Cooling Film

Qin

Lin

Liang

et al. 2023

Ind. Eng. Chem. Res.

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Daytime passive radiative cooling has emerged as an energy-saving cooling technique. However, market penetration of current daytime passive radiative cooling-related membranes is still miniscule due to deficiencies in scalability, recyclability, and robustness. This work successfully addresses these issues by concurrently imparting the following features in a designed polymeric cooler: (1) cost-effective and recyclable raw materials that highlight the sustainability; ( 2) scalable yet exquisite structureengineering strategy to afford superb light scattering performance;(3) malleable under facile conditions to fit complex surface conformably. Specifically, our cooling membrane is solely composed of a mass chemical, polyvinyl butyral, which forms a supramolecular network with the polymer−air interface as light scattering sites and −C−O−C− bonds as infrared emitters. The structure of the polyvinyl butyral membrane is exquisitely organized via kinetical arrest of network-forming phase separation. The spatial size, contrast, and distribution of phase domains can be finely manipulated via tuning the composition routes and depth of phase separation. The optimized membrane demonstrates all-day and all-climate cooling with a 7.3 °C subambient cooling and 62 W/m 2 cooling power. In addition to this superb cooling performance, this membrane uniquely affords a collective of multiple features, such as cost effectiveness, recyclability, and hydrophobicity.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Arrested Phase Separation Enables Optimal Light Management toward High-Performance Passive Radiative Cooling Film

Qin

Lin

Liang

et al. 2023

Ind. Eng. Chem. Res.

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“…On the other hand, when the molecular weight of the polymer is too large, the same is not feasible. It is known that as the number of repeating units of a polymer increases, its solubility parameter decreases . The decrease in the value of solubility parameter means that the polymer will tend to be lipophilic.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Bonding Principle-Based Molecular Design of a Polymer Excipient and Impacts on Hydrophobic Drug Properties: Molecular Simulation and Experiment

et al. 2023

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Although some commercial excipients for improving the solubility of highly crystalline drugs are widely used, they still cannot cover all types of hydrophobic drugs. In this regard, with phenytoin as the target drug, related molecular structures of polymer excipients were designed. The optimal repeating units of NiPAm and HEAm were screened out through quantum mechanical simulation and Monte Carlo simulation methods, and the copolymerization ratio was also determined. Using molecular dynamics simulation technology, it was confirmed that the dispersibility and intermolecular hydrogen bonds of phenytoin in the designed copolymer were better than those in the commercial PVP materials. At the same time, the designed copolymers and solid dispersions were also prepared during the experiment, and the improvement of their solubility was confirmed, which is in accordance with the simulation predictions. The new ideas and simulation technology may be used for drug modification and development.

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“…In addition, it pointed out that solubility parameters can predict the practicability of polymers in many technical applications 52 . Table 3 shows solubility parameters of MPPIs simulated by Materials Studio 2019 software and some common solvents 52,53,56 . Generally, the solubility of polymers in solvents can be predicted by comparing the solubility parameters of the two components.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of new copolyimides containing pyridine and morpholine groups for gas separation through molecular design and simulation

Niu

Lai³

et al. 2022

J of Applied Polymer Sci

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Through one-step copolymerization of 4-(4-[1-morpholinyl]phenyl)-2,6-bis (4-aminophenyl)pyridine (MPAP), 9,9-bis(4-aminophenyl)fluorene (BAFL), and (4,4 0 -hexafluoroisopropylidene)diphthalic anhydride (6FDA), a series of polyimides containing morpholine group, pyridine ring, fluorene "cardo" pendant and hexafluoroisopropyl group are obtained. The synthesized polyimides have good thermal stability, high transparency, outstanding hydrophobicity and excellent solubility in not only high-boiling solvents but also low boilingpoint solvents. Furthermore, polyimide films have large molecular chain spacing, which is consistent with the free volume calculated by molecular simulation. Consequently, polyimide membranes display better gas permeability values of CO 2 (up to 24.47 Barrer) and He (up to 45.04 Barrer), and good ideal gas selectivity values of CO 2 /N 2 (up to 15.33 Barrer) and He/N 2 (up to 23.89 Barrer), which also shows potential application of polyimide matrix materials in gas separation.

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Polyvinyl Butyral with Different Acetalization Degrees: Synthesis and Solubility Parameters

Cited by 9 publications

References 38 publications

Arrested Phase Separation Enables Optimal Light Management toward High-Performance Passive Radiative Cooling Film

Arrested Phase Separation Enables Optimal Light Management toward High-Performance Passive Radiative Cooling Film

Hydrogen Bonding Principle-Based Molecular Design of a Polymer Excipient and Impacts on Hydrophobic Drug Properties: Molecular Simulation and Experiment

Synthesis of new copolyimides containing pyridine and morpholine groups for gas separation through molecular design and simulation

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