Synthesis and Reaction of Polyvinyl Chloride Containing Dithiocarbamate Group

Ôkawara, Makoto; Morishita, Koichi; Imoto, Eiji

doi:10.1246/nikkashi1898.69.4_761

Cited by 29 publications

(4 citation statements)

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“…1 The reaction mixture was then poured into a mixture of water and methyl alcohol to precipitate the polymer. 'After being washed with water and methyl alcohol several times, the polymer was dried under vacuum.…”

Section: Synthesis Of Matrix Polymermentioning

confidence: 99%

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A new antithrombogenic heparinized polymer

Miyama

Harumiya

Mori

et al. 1977

J. Biomed. Mater. Res.

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A new antithrombogenic polymer was synthesized by photoinduced graft copolymerization of both a hydrophilic polymer and a cationic polymer to hydrophobic poly (vinyl chloride) copolymer, and by quarternizing and heparinizing the obtained graft copolymer. For polymers of various compositions obtained by the method described above, chemical composition, water absorption, membrane potential, and quantity of adsorbed heparin were determined and antithrombogenicity evaluated in vivo. Thus, it has been found that the polymer of excellent antithrombogenicity has a negative membrane potential, a moderate elution rate of heparin, adsorbs heparin in a quantity of approximately 15 wt-%, and has a degree of water adsorption of about 30 wt-%. Also, measurement of membrane potential was very useful for the estimation of the quantity of the adsorbed heparin and its change with time.

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Section: Synthesis Of Matrix Polymermentioning

confidence: 99%

“…When the salt concentration is high, the mobility of the cation becomes equal to that of the anion, that is, C becomes zero, which makes negligible thc second term in eq. (1) for Em. Therefore, according to eq.…”

Section: Rsd+oh-+ Naclmentioning

confidence: 99%

A new antithrombogenic heparinized polymer

Miyama

Harumiya

Mori

et al. 1977

J. Biomed. Mater. Res.

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“…In the first step, the chlorine atoms of PVC react with thio compounds, such as potassium mercaptobenzothiazolate and potassium diethyldithio carbamate [2,10] to form macroinitiators with active thio functionality on the chain. In the second step, UV light decomposes the macroinitiators into macroradicals and primary thio radicals which can further react with various monomers to form graft copolymers or homopolymers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PVC-graft-PMMA Through Stereoselective Nucleophilic Substitution on PVC

Martínez

Santos

Millán³

2001

Macromol. Chem. Phys.

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“…solution and in the condensed state. [1][2][3][4][5] Duchacek and Kuta 13 have crosslinked PVC by tetramethyl-thiuramdisulphide in the presence CHEMICAL CROSSLINKING of zinc oxide. They found the activation energy for Modification of PVC by crosslinking has aroused the crosslinking reaction to be 106 KJ mol.…”

Section: Introductionmentioning

confidence: 99%

Aminosilane grafting of plasticized poly(vinyl chloride) I. Extent and rate of crosslinking

Rodríguez‐Fernández

Gilbert

1997

J. Appl. Polym. Sci.

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ABSTRACT:The grafting of poly(vinyl chloride) (PVC) by reactive aminosilane compounds, which make them moisture-curable, has been investigated. Plasticized poly-(vinyl chloride) has been successfully grafted with aminosilane during extrusion. The grafted polymer was crosslinked in the presence of moisture. Although the hydrolysis and condensation of the crosslinking agent is very rapid, the speed of the reaction is controlled by the rather slow diffusion of water in the plasticized PVC. This water diffusion speed follows Fick's Law and is strongly dependent on temperature. To achieve a high crosslinking speed, the extruded PVC has to be placed in warm water or in a steam heated vessel. The effects of catalyst concentration, moisture concentration, and immersion time and temperature on the rate and degree of crosslinking were investigated. Since the formulation used contained a tin stabilizer, the addition of a tin catalyst to the immersion water had little effect. Crosslinking did occur in samples stored at room temperature due to the presence of moisture, but the reaction rate was increased substantially if the sample was immersed in water. Reaction rate was very temperature dependent and followed an Arrhenius relationship.

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Synthesis and Reaction of Polyvinyl Chloride Containing Dithiocarbamate Group

Cited by 29 publications

References 0 publications

A new antithrombogenic heparinized polymer

A new antithrombogenic heparinized polymer

Synthesis of PVC-graft-PMMA Through Stereoselective Nucleophilic Substitution on PVC

Aminosilane grafting of plasticized poly(vinyl chloride) I. Extent and rate of crosslinking

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