Morphology control of ethylene/CO copolymer with a novel inverse suspension polymerization

Kang, Won Jun; Huh, Seong Rok; Park, Byung-Sik; Lee, Dong‐Ho; Yoon, Keun‐Byoung

doi:10.1016/j.catcom.2015.01.017

Cited by 8 publications

(10 citation statements)

References 14 publications

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“…Moreover, the fouling raises synthetic costs and reduces the bulk density of polymers. Thus, antifouling technologies are critical for the commercialization of polyketones . As an antifouling method, seed materials have been added to the reaction media. , However, further exploration is required to reduce the amount of seed materials.…”

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confidence: 99%

Hollow and Microporous Organic Polymers Bearing Sulfonic Acids: Antifouling Seed Materials for Polyketone Synthesis

et al. 2016

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The reactor fouling is a notorious obstacle in managing continuous synthetic processes of polyketones. The fouling raises synthetic costs and reduces the bulk density of polymers. Thus, efficient seed materials are required for antifouling performance. Hollow microporous organic polymers (HMOPs) were prepared using ZIF-8 nanoparticles as templating materials. Sulfonic groups were incorporated into HMOP via a post synthetic approach. The resultant HMOP−SO 3 H (20−90 μg/mL in methanol) showed successful catalyst activation and antifouling performance in polyketone synthesis.

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confidence: 99%

Hollow and Microporous Organic Polymers Bearing Sulfonic Acids: Antifouling Seed Materials for Polyketone Synthesis

et al. 2016

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“…To reveal the details of the structural defect of PK, 20 a reasonable attribution of the additional 13 C NMR spectra peaks is required. 1 The results for entry 3 show that a 115% higher activity was achieved for the homogeneous polymerization without the strong acid, p-TsOH, compared to that for entry 2.…”

Section: ■ Introductionmentioning

confidence: 99%

“…PK can be efficiently synthesized by palladium-based catalysts with a bidentate, phosphine-ligand structure . Due to its insolubility in conventional solvents, PK is often generated in the industry through slurry polymerization procedures. , Typically, the polymerization solvent is methanol, which is not only a polymerization media but also a reagent in the palladium-based catalytic system. ,, The palladium-based catalysts used in the slurry polymerization method to create PK typically have activity in the range of 6.5–23.1 kg PK·g –1 Pd·h –1 . , However, it is challenging to avoid the significant difficulties posed, such as reactor fouling and the development of low-bulk-density PK in the slurry processes, due to the continual precipitation of PK from methanol. , Palladium metal is difficult to be recycled since the catalyst is enclosed in the PK product. Additionally, it is challenging to remove the catalyst residuals buried in the polymers, which causes the PK product’s thermal properties to degrade .…”

Section: Introductionmentioning

confidence: 99%

Activation of a Palladium-Based Catalyst by Hexafluoroisopropanol for Polyketone Synthesis via Homogeneous Solution Polymerization

Bie

Yao

Jie

et al. 2023

Ind. Eng. Chem. Res.

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Polyketone (PK) is a promising material because of its superior qualities as an engineering plastic and the direct use of CO. It is typically produced using slurry polymerization techniques, which cause reactor fouling and low bulk density product. Here, solution polymerization of CO/ethene/propene with high-molecular-weight products (240.3 kDa) and high catalytic activity (36.1 kg PK•g −1 Pd•h −1 ) was achieved utilizing a mixture of hexafluoroisopropanol (HFIP) and methanol. Both the activity and M w are an order of magnitude higher than those reported in the literature. HFIP was able to activate the palladium-based precatalyst without using any strong acid. The 31 P NMR, singlecrystal X-ray diffraction, and density functional theory analysis prove that HFIP decreased the coordination between palladium and the acetate ligands of the precatalyst without the disassociation of the acetate. Furthermore, the active centers in the HFIP system were more stable than that in the catalytic system with strong acid.

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“…Broadly speaking, hydrogels could be prepared from either synthetic and/or natural polymers. The methods of hydrogel preparations are: (i) Bulk polymerization (Ahmed, 2015), (ii) Solution polymerization/cross-linking (Peng et al, 2016), (iii) Suspension polymerization or inverse-suspension polymerization (Kang et al, 2015), (iv) Polymerization by irradiation (Ergan et al, 2015) and (v) Ultrasound-induced polymerization (Loganathan et al, 2013;Chu et al, 2015 andAzizi &Farahnaky et al, 2013). Ultrasound is a wave with a frequency exceeding the upper limit of human hearing and transmit this energy in the form of mechanical vibrations through a medium (Murthi et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Comparative study of poly(vinyl alcohol)/poly(N-vinyl-2-pyrrolidinone) hydrogels induced by ultrasound and gamma rays for ionoprinting technique

Elhady¹,

Awadallah

2018

Egypt. J. Rad.Sci.

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I N THIS STUDY, polyvinyl alcohol (PVA) and poly (N-vinyl-2-pyrrolidinone) (PNVP) hydrogels were prepared by two techniques of irradiation; ultrasound and gamma rays, respectively in purpose of comparative study. The formed hydrogels from both approaches were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry, (DSC), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray spectroscopy (XRD), hardness and inductively coupled plasma optical emission spectroscopy ((ICP-OES). Moreover, the swelling behavior and gel faction were studied for the produced hydrogels of both approaches. The results indicate that hydrogels were prepared by both approaches are having the similar physical and chemical properties. The hydrogels formed were used in the ionoprinting technology. The ionoprinting technology has ability to topographically structure and actuates hydrogels by locally patterning ions via complexation assisted by electric fields. The significant features of ionoprinted hydrogels are stable for 36 days. Further, the ionoprinting process is fully reversible by immersion the ionoprinting hydrogels into a chelator.

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Morphology control of ethylene/CO copolymer with a novel inverse suspension polymerization

Cited by 8 publications

References 14 publications

Hollow and Microporous Organic Polymers Bearing Sulfonic Acids: Antifouling Seed Materials for Polyketone Synthesis

Hollow and Microporous Organic Polymers Bearing Sulfonic Acids: Antifouling Seed Materials for Polyketone Synthesis

Activation of a Palladium-Based Catalyst by Hexafluoroisopropanol for Polyketone Synthesis via Homogeneous Solution Polymerization

Comparative study of poly(vinyl alcohol)/poly(N-vinyl-2-pyrrolidinone) hydrogels induced by ultrasound and gamma rays for ionoprinting technique

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