PVC/PBA random copolymers prepared by Living Radical Polymerization (SET–DTLRP): Entanglements and chain dimensions

[Display omitted] •We have obtained homogeneous random PVC/PBA copolymers by SET–DTLRP.•We show data on the correlation Microestructure-Rheology.•Block and random copolymers present opposite thermorheological behavior.•We determine chain parameters, such as characteristic ratio and packing length. F...

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Bibliographic Details
Published in:European polymer journal 2015-12, Vol.73, p.202-211
Main Authors: Calafel, Itxaso, Muñoz, María Eugenia, Santamaría, Anton, Boix, Miquel, Conde, Jose Ignacio, Pascual, Belén
Format: Article
Language:English
Subjects:
Chain transfer
Chains (polymeric)
Characteristic ratio
Copolymers
Dynamic viscoelasticity
Entanglement
Melts
Polymerization
Polyvinyl chlorides
PVC copolymers
Radicals
Self-plasticization
Thermorheological complexity
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Summary:[Display omitted] •We have obtained homogeneous random PVC/PBA copolymers by SET–DTLRP.•We show data on the correlation Microestructure-Rheology.•Block and random copolymers present opposite thermorheological behavior.•We determine chain parameters, such as characteristic ratio and packing length. For the first time PVC–PBA random copolymers were prepared by Single Electron Transfer–Degenerative Chain Transfer Living Radical Polymerization giving rise to homogeneous chains, in terms of PVC/PBA proportion. Dynamic viscoelastic measurements in the terminal zone allowed evaluating the entanglement plateau modulus value, GN0, for each composition. An equation based on a model that correlates GN0 to melt chain dimensions was used to fit the variation of GN0 with PBA concentration. Correspondingly, the entanglements number, the characteristic ratio and the packing length values of each copolymer were obtained. As a corollary, the characteristic ratio of PBA, never reported before, was also evaluated.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2015.10.013