http://www.cnr.it/ontology/cnr/individuo/prodotto/ID234223

Blends of polypropylene with poly(vinyl butyral) (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Blends of polypropylene with poly(vinyl butyral) (Articolo in rivista) (literal)

Anno

2001-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1002/app.2149 (literal)

Alternative label

Cascone E, David D.J., Di Lorenzo M.L., Karasz, F.E., Macknight, W.J., Martuscelli, E., Raimo, M. (2001)
Blends of polypropylene with poly(vinyl butyral)
in Journal of applied polymer science (Print); JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012, New York (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Cascone E, David D.J., Di Lorenzo M.L., Karasz, F.E., Macknight, W.J., Martuscelli, E., Raimo, M. (literal)

Pagina inizio

2934 (literal)

Pagina fine

2946 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://onlinelibrary.wiley.com/doi/10.1002/app.2149/abstract (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

82 (literal)

Rivista

Journal of applied polymer science (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

13 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

12 (literal)

Note

Scopu (literal)
ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Istituto di Ricerca e Tecnologia Delle Materie Plastiche (CNR), Via Toiano, 6-80072 Arco Felice (NA), Italy Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA 01003-4530, United States (literal)

Titolo

Blends of polypropylene with poly(vinyl butyral) (literal)

Abstract

The thermal stability, crystallization behaviour, and morphology of poly-(vinyl butyral) (PVB) with differing compositions of vinyl alcohol and butyral units were investigated. It was found that the glass-transition temperature of PVB decreases with increasing concentration of butyral units, mainly because of the reduced number of hydrogen bonds between hydroxyl groups of the chains. PVB samples with high vinyl alcohol content (>=63.3% by weight) are crystallizable and present an endothermic melting peak in the range 170-220°C. The thermal stability of PVB is also influenced by composition and increases with the number of butyral units. The thermal and crystallization characteristics of PVB were compared with those of neat polyvinyl alcohol (PVA), and the differences explained in terms of molecular structure. Two amorphous PVB samples, containing 31 and 14 wt % of vinyl alcohol units, respectively, were blended with isotactic polypropylene grafted with maleic anhydride (PP-MA), the latter of which was present to favour compatibilization of the components through chemical reaction or dipolar interactions involving the anhydride groups of the PP-MA and the hydroxyl groups of PVB. Properties of PP-MA/PVB 90/10 blends, prepared by melt extrusion, were compared to those of neat PP-MA. Both the PVBs used were immiscible with PP-MA, as indicated by the invariance of glass-transition temperatures with the composition of the blends. However, a high level of compatibility between the components was achieved because the blends showed good mechanical properties that were comparable to, or even superior to, those of neat PP-MA. The analysis of the crystallization kinetics, performed both in isothermal and nonisothermal modes, showed that crystallization of polypropylene is only slightly influenced by the presence of the PVB phase. (literal)

Editore