About
Contact
Help
Sending publications
How to publish
Advanced Search
View Item 
  •   Home
  • Facultad de Ciencias Químicas y Farmacéuticas
  • Artículos de revistas
  • View Item
  •   Home
  • Facultad de Ciencias Químicas y Farmacéuticas
  • Artículos de revistas
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse byCommunities and CollectionsDateAuthorsTitlesSubjectsThis CollectionDateAuthorsTitlesSubjects

My Account

Login to my accountRegister
Biblioteca Digital - Universidad de Chile
Revistas Chilenas
Repositorios Latinoamericanos
Tesis LatinoAmericanas
Tesis chilenas
Related linksRegistry of Open Access RepositoriesOpenDOARGoogle scholarCOREBASE
My Account
Login to my accountRegister

Melt functionalization of polypropylene with methyl esters of itaconic acid

Artículo
Thumbnail
Open/Download
IconMelt BRUNA, 2001.pdf (202.0Kb)
Publication date
2001-05
Metadata
Show full item record
Cómo citar
Bruna, J.
Cómo citar
Melt functionalization of polypropylene with methyl esters of itaconic acid
.
Copiar
Cerrar

Author
  • Bruna, J.;
  • Yazdani-Pedram Zobeiri, Mehrdad;
  • Quijada Abarca, Juan;
  • Valentín, J. L.;
  • López Manchado, Miguel;
Abstract
Polypropylene (pp) was functionalized in the melt phase by grafting with itaconic acid derivatives. 2,5-dimethyl-2,5-bis(tert-buthyl-peroxy) hexane (lupersol 101) was used as radical initiator. A Brabender Plasticorder was used for all the experiments. The optimum conditions for the grafting reaction were 190 degreesC, 75 rpm and 6 min. The itaconic acid derivatives used in this work were mono- and dimethyl esters. When dimethyl itaconate (DMI) was used as functional polar monomer, a maximum of 1.5% of grafting was reached. A similar value was found for grafting of monomethyl itaconate (MMI) where a maximum of 1.6% by weight of this monomer was incorporated in pp. The existence of grafted MMI and/or DMI in pp was confirmed by FT-IR spectroscopy. Carbonyl absorption bands from either MMI and/or DMI were observed in the FT-IR spectrum of the modified pp. The percentage of grafting attained was also followed by FT-IR analysis, where the amount of monomer incorporated in pp was estimated from a calibration curve established for the monomers used in this work. A systematic study of the reaction variables allowed the optimization of the grafting process. It was found that the percentage of grafting attained depends on the initial concentration of both monomer and initiator used in the reaction. Some properties of the modified pps were evaluated by employing dilute solution viscosity and differential scanning calorimetric (DSC) measurements. It was found that the molecular weight of the grafted polymer decreased with increasing percentage of grafting. DSC measurements indicated that functionalized pp samples have slightly higher crystallinity but show the same melting temperature as pp.
Identifier
URI: https://repositorio.uchile.cl/handle/2250/120574
ISSN: 0032-3861
Quote Item
POLYMER 42(10):4751-4758
Collections
  • Artículos de revistas
xmlui.footer.title
31 participating institutions
More than 73,000 publications
More than 110,000 topics
More than 75,000 authors
Published in the repository
  • How to publish
  • Definitions
  • Copyright
  • Frequent questions
Documents
  • Dating Guide
  • Thesis authorization
  • Document authorization
  • How to prepare a thesis (PDF)
Services
  • Digital library
  • Chilean academic journals portal
  • Latin American Repository Network
  • Latin American theses
  • Chilean theses
Dirección de Servicios de Información y Bibliotecas (SISIB)
Universidad de Chile

© 2020 DSpace
  • Access my account