Synergistic enhancement of modified sericite on rheological and foaming properties of poly (lactic acid).
Int J Biol Macromol
; 253(Pt 6): 127235, 2023 Dec 31.
Article
em En
| MEDLINE
| ID: mdl-37793520
ABSTRACT
Due to low melt strength and slow crystallization rate, poly (lactic acid) (PLA) foam materials are still not satisfactory. In order to improve the foaming performance of PLA, sericite (GA) was selected as the filler and modified by 3-Aminopropyltriethoxysilane (KH-550). Through melt blending with PLA, azodicarbonamide (ADC) foaming agent was selected for molding foaming, and PLA/GA composite foam was prepared. The addition of GA not only acts as a nucleating agent to improve the crystallization performance of the blend, but also improves its complex viscosity and storage modulus, and enhances its melt strength, so that the compressive strength and impact strength of the prepared composite foam are increased by 265.5 % and 224.0 %, respectively. Compared with PE foam, PLA/GA composite foam showed excellent thermal insulation performance through thermal infrared imaging test. Based on its mechanical and thermal insulation properties, this sample provides new materials for the field of wall insulation and foam packaging. This study provides an effective way to improve the melt strength and workability of PLA.
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MEDLINE
Assunto principal:
Poliésteres
/
Dióxido de Silício
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article