Author | dc.contributor.author | Domínguez Barceló, Ana María | |
Author | dc.contributor.author | Quijada Abarca, Juan | es_CL |
Author | dc.contributor.author | Yazdani-Pedram Zobeiri, Mehrdad | es_CL |
Admission date | dc.date.accessioned | 2009-03-30T16:23:14Z | |
Available date | dc.date.available | 2009-03-30T16:23:14Z | |
Publication date | dc.date.issued | 2006-08-07 | |
Cita de ítem | dc.identifier.citation | MACROMOLECULAR MATERIALS AND ENGINEERING Volume: 291 Issue: 8 Pages: 962-971 Published: AUG 7 2006 | en |
Identifier | dc.identifier.issn | 1438-7492 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/124831 | |
Abstract | dc.description.abstract | Functionalized metallocene copolymers synthesized from ethylene with 5-hexen-1-ol and ethylene with 10-undecen-1-ol were used as compatibilizers in LDPE/starch and LDPE/dextran blends in order to improve the interfacial adhesion between hydrophobic LDPE and hydrophilic natural polymers. An increase in tensile modulus and a slight decrease in tensile strength was observed when poly [ethylene-co-(10-undecen-1-ol)] was added to a 70:30 wt.-% LDPE/dextran blend, whereas the addition of poly[ethylene-co-(5-hexen-1-ol)] as compatibilizer resulted in obtaining a more rigid material with a slightly higher modulus. Scanning electron microscopy of modified dextran blends containing 3 wt.-% of both compatibilizers showed some degree of phase cocontinuity. Enhanced interfacial adhesion and decrease in particle size of starch was observed when 5 wt.-% of poly [ethylene-co(5-hexen-1-ol)] copolymer was used as the compatibilizer in starch blends. The crystallization temperature of LDPE, determined by DSC, was shifted to a slightly higher temperature as a consequence of the addition of the compatibilizers. The existence of phase segregation was also revealed by thermal analysis when 5 wt.-% of the copolymers were used as blend modifiers. | en |
Lenguage | dc.language.iso | en | en |
Publisher | dc.publisher | STARCH BLENDS | en |
Keywords | dc.subject | STARCH BLENDS | en |
Título | dc.title | Use of functionalized metallocene copolymers from ethylene and polar olefins as compatibilizers for low-density-polyethylene/starch and low-density-polyethylene/dextran blends | en |
Document type | dc.type | Artículo de revista | |