Modification of Polypropylene by Blending with Oligopinene

Autor:	Luis C. Mendes, B. B. B. Martins
Rok vydání:	2002
Předmět:	Polypropylene Heptane Molar mass Materials science Polymers and Plastics Drop (liquid) Oligomer chemistry.chemical_compound Brittleness chemistry Materials Chemistry Ceramics and Composites Polymer blend Composite material Elastic modulus
Zdroj:	Polymers and Polymer Composites. 10:183-188
ISSN:	1478-2391 0967-3911
DOI:	10.1177/096739110201000204
Popis:	The changes in physical properties, melting behaviour and morphology of polypropylene (PP) in binary blends with low molar mass oligopinene resin were evaluated. Melting mixtures were prepared in a Haake Rheocord at 473 K, 30 rpm, for 600s; an abrupt drop in torque was observed when the blends were enriched by oligomer. At room temperature, with up to 20% of oligopinene, the nominal stress-strain curves of the blends showed a change in behaviour from ductile to brittle. The elastic modulus increased, and the other mechanical parameters were also dependent on the composition. The density increased linearly with oligopinene content, and the hardness also increased with the amount of oligomer present. No phase segregation was observed, before or after etching with heptane. The SEM results indicated that the oligopinene component is located mainly in the intraspherulitic regions of the PP.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a11b3ec11a53ac9e248f3a1a9816e940 https://doi.org/10.1177/096739110201000204 Zobrazit plný text záznamu