Vinyl chloride–propylene copolymerization

Ravey, M.; Waterman, J. A.; Shorr, L. M.; Kramer, Michael C.

doi:10.1002/pol.1976.170140704

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…Propylene, even at low concentrations, has a significant influence on the kinetics and mechanism of the copolymerization process. In the copolymer, it acts as a chain-bearing compound, which results in lower molecular weight and copolymerization rate than in the case of polyvinyl chloride [7].…”

Section: Introductionmentioning

confidence: 99%

Application of a compositional rotatable plan in modeling the propylene content in a vinyl chloride/propylene copolymer

Wiener

Gawdzik

2019

Polym. Bull.

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Using a fractional rotatable plan, the effect of five input parameters of the conduct of the copolymerization process on the amount of propylene built into the copolymer, obtained as a result of free radical suspension copolymerization of vinyl chloride with propylene in a batch suspension polymerization reactor, was analyzed. Using the results obtained, the analysis of variance was carried out and the influence of particular factors and their interactions on the product properties was determined. Thus, it was determined that the greatest influence on the amount of the incorporated propylene in the copolymer is exerted by the amount of propylene introduced into the system, while the effect of the initiator on the product properties analyzed was found to be negligible. A mathematical model was also made, and then it was improved through the use of stepwise regression and verification with the results of laboratory experiments. The adequacy of the achieved model was confirmed using the Fisher-Snedecor test. It was obtained the conformity of the constructed model with the analysis of the influence of particular factors on the propylene content in the copolymer.

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Section: Introductionmentioning

confidence: 99%

Application of a compositional rotatable plan in modeling the propylene content in a vinyl chloride/propylene copolymer

Wiener

Gawdzik

2019

Polym. Bull.

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Copolymerization of vinyl chloride with 1‐olefins. III. An investigation of the copolymerization reaction of vinyl chloride with 1‐butene and 1‐pentene

Mrázek

Jungwirt

Kolínský

1987

J of Applied Polymer Sci

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SynopsisSeries of suspension copolymerizations of vinyl chloride with various contents of 1-butene and 1-pentene (5-30 mass%) were carried out under the same reaction conditions. By applying a method which utilizes periodic sampling of heterogeneous reaction mixture from the reactor during the reaction and a gas chromatographic determination of unreacted vinyl chloride in the sample, the conversion curves of vinyl chloride were determined and the initial reaction rates were compared.

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The copolymerization of vinyl chloride with 1‐olefins. V. Heat stability of copolymers of vinyl chloride with propene, 1‐butene, and 1‐pentene

Mrázek

Lukáš

Pr̆ádová

1991

J of Applied Polymer Sci

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SYNOPSISCopolymers of vinyl chloride with propene, 1-butene, and 1-pentene containing 2-15 mol % of 1-olefinic structural units were prepared. The copolymers were dehydrochlorinated at 18OoC in an inert atmosphere; the amount of hydrogen chloride split off was determined by continuous potentiometry. The results show that the heat stability of propene, 1-butene, and 1-pentene copolymers containing the same amount of 1-olefinic structural units does not differ significantly. Compared with the homopolymer of vinyl chloride, it is favorably affected by the presence of 1-olefinic structural units in poly (vinyl chloride) (PVC) chains. On the other hand, however, the heat stability of copolymers is impaired by the higher content of structural defects able to initiate the dehydrochlorination reaction. These structural defects, probably represented by chloroallyl groups, are formed in the copolymers during their synthesis. At the beginning of heating, structural defects produce intensive dehydrochlorination and, therefore, copolymers of vinyl chloride with 1-olefins if processed appear to be less thermally stable than does PVC. I NTRO DUCT10 NIn our earlier papers, we investigated the kinetic course of the copolymerization of vinyl chloride with propene, 1-butene, and l-pentene.2 Later, other samples of these copolymers were tailored so that their parameters allowed us to characterize the effect of the individual 1-olefins and of molecular weight of the copolymers on rheological and mechanical properties of these material^.^ A chosen assembly of such samples was investigated with respect to heat stability by using a continuous potentiometric determination of hydrogen chloride. The amount of hydrogen chloride released and the time dependencies thus derived were used to describe the dehydrochlorination process of the copolymers of vinyl chloride with 1 -olefins differing in the content and length of the comonomer and to compare this process with the behavior of the ho-* To whom correspondence should be addressed.

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Vinyl chloride–propylene copolymerization

Cited by 9 publications

References 5 publications

Application of a compositional rotatable plan in modeling the propylene content in a vinyl chloride/propylene copolymer

Application of a compositional rotatable plan in modeling the propylene content in a vinyl chloride/propylene copolymer

Copolymerization of vinyl chloride with 1‐olefins. III. An investigation of the copolymerization reaction of vinyl chloride with 1‐butene and 1‐pentene

The copolymerization of vinyl chloride with 1‐olefins. V. Heat stability of copolymers of vinyl chloride with propene, 1‐butene, and 1‐pentene

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