Poly(allylammonium acrylate) as a drug-releasing matrix |
| |
Authors: | P Cerrai G D Guerra S Maltinti M Tricoli |
| |
Affiliation: | (1) Grupo de Polímeros USB, Departamento de Ciencia de los Materiales, Universidad Simón Bolívar, Apartado 89000, Caracas 1080-A, Venezuela, VE |
| |
Abstract: | A large increase in the crystallization temperature of low density polyethylene (LDPE) when blended with high density polyethylene
(HDPE) is reported. Such behavior is observed for quenched LDPE rich blends when the low melting component is cooled from
119 °C under controlled conditions in the differential scanning calorimeter. It is suggested that the presence of the most
linear LDPE methylene segments within the HDPE-rich crystals (cocrystallization phenomenon) facilitates the nucleation of
the more branched LDPE segments on cooling. On reheating, a depression in the low melting temperature component (LDPE) is
observed with increasing HDPE content in the blend.
Received: 29 December 1996/Revised: 11 March 1997/Accepted: 14 March 1997 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|