Effect of starch nanoparticles on the crystallization kinetics and photodegradation of high density polyethylene

Amigo N.; Palza H.; Canales D.; Sepúlveda F.; Vasco, D.A.; Sepúlveda F.; Zapata, P.A

Abstract

Starch nanoparticles (SNp) with a diameter of ca. 70 nm were synthesized and used as fillers to prepare high density polyethylene (PE) composites by in situ polymerization. The effect of these particles on the thermal degradation, isothermal and nonisothermal crystallization, and photodegradation of PE was studied. SNp decreased the thermal degradation temperature of PE as tested by thermogravimetric analysis and increased the relative crystallinity and crystallization rate under isothermal conditions. This nucleating agent effect was confirmed by nonisothermal crystallizations as composites presented higher crystallization temperatures than neat PE. The photodegradation tests under UV radiation during 28 days showed that NPp promoted the polymer degradation by increasing the amount of carbonyl groups and by forming cavities at the nanoparticle/PE interface. Our findings open up new strategies for using SNp as filler in PE matrices to increase not only its photodegradation, but also its thermal properties.

Más información

Título según WOS: Effect of starch nanoparticles on the crystallization kinetics and photodegradation of high density polyethylene
Título según SCOPUS: Effect of starch nanoparticles on the crystallization kinetics and photodegradation of high density polyethylene
Título de la Revista: COMPOSITES PART B-ENGINEERING
Volumen: 174
Editorial: ELSEVIER SCI LTD
Fecha de publicación: 2019
Idioma: English
DOI:

10.1016/j.compositesb.2019.106979

Notas: ISI, SCOPUS