Thermoelastic properties of plasticized polyvinylchloride

Guzeyev, V.V.; Malinskii, Yu.M.; Shkalenko, Zh.I.

doi:10.1016/0032-3950(75)90111-2

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…These conclusions are in general agreement with previous studies by Shtarkman et al [38] and by Guzeyev et al [39]. A slight increase of the degree of crystallinity was observed for DEHP-PVC samples prepared under identical conditions but with higher molecular weight PVC.…”

Section: Tm T ° Ah2supporting

confidence: 95%

“…In fact, linear regression of the data of figure 6 showed that the linear fitting is better for the quenched, non-crystalline than for the annealed, semicrystalline samples. Apart from the preliminary work of Hengstenberg and Schuch [20], the only effort to determine the number of "physical crosslinks" (both entanglements and crystallites) in plasticized PVC was that of Guzeyev et al [39]. Using DEHP-plasticized PVC samples as relatively stable networks of intermolecular physical bonds we elaborated on this subject by obtaining quantitative network characteristics from the stress relaxation experiments at small deformations, using equation (4), as previously discussed by one of the authors [43].…”

Section: Three-dimensional Network Structuresmentioning

confidence: 98%

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Microcrystalline and three-dimensional network structure of plasticized poly(vinyl chloride)

Patterson

Padgett

Peppas

1982

Colloid & Polymer Sci

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Three-dimensional networks can be formed in plasticized poly(vinyl chloride) by chain entanglements and crystallites introduced in the system during the fusion and annealing processes. The fusion conditions influence the mechanical stability of the plasticized polymers, by establishing regions where one-phase systems are observed. During annealing at temperatures of between 170 and 190 ~ for up to 9 minutes, maximum degree of crystallinity of 0.079 was detected for samples plasticized with 20 wt% di-2-ethyl-hexyl-phthalate. Experimental analysis of mechanical properties and analysis of stress relaxation experiments showed that rubber elasticity theories could be applied with some approximation to plasticized PVC to analyze the structure of the three-dimensional networks formed.

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Section: Tm T ° Ah2supporting

confidence: 95%

Section: Three-dimensional Network Structuresmentioning

confidence: 98%

Microcrystalline and three-dimensional network structure of plasticized poly(vinyl chloride)

Patterson

Padgett

Peppas

1982

Colloid & Polymer Sci

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Cooperation between chemical and physical networks in crosslinked and plasticized PVC

Hjertberg¹,

Dahl²

1991

J of Applied Polymer Sci

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SYNOPSISThe effect of crosslinking of plasticized PVC on the mechanical properties has been investigated. Crosslinking was performed by using a dithioltriazine, and penetration as a function of temperature was used to follow the changes in mechanical properties. Changes in the melting behavior were detected by differential scanning calorimetry. Even rather low levels of gel content gave a substantial reduction in penetration in the interval 60-llO"C, while a more complete reaction prevented major penetration up to at least 200°C. The penetration curve of heavily crosslinked materials showed several plateaus and the transitions could be related to melting of different crystallites formed by annealing at different temperatures. The physical network formed by the crystallites constitutes an important complement to the chemical network in plasticized PVC crosslinked by dithioltriazine. Both the amount and the melting temperature of the crystallites increased after annealing. The introduction of the chemical network further improved the heat resistance of the crystallites. The presence of the two networks will therefore show a synergistic effect with respect to the mechanical properties at increased temperatures.

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