Non-isothermal crystallization,melting and thermal degradation behaviors of LLDPE/nano-CaCO3

Nano-CaCO3 was filled into liner low density polyethylene (LLDPE) by melt-blending process. The non-isothermal crystallization,melting and thermal degradation behaviors of LLDPE/nano-CaCO3 composites were researched by means of DSC. The result showed: In compared with pure LLDPE, both non-isothermal crystallization peak onset tempreture (To) and non-isothermal crystallization peak tempreture (Tp) of LLDPE/nano-CaCO3 composites were increased, the maximum value of To and Tp were increased 1.72 °C and 1.59 °C respectively; the maximum value of melting peak tempreture of LLDPE/nano-CaCO3 composites increased 2.31 °C;In the process of thermal degradation, the thermodynamic stability of LLDPE/nano-CaCO3 composites increase with increase of dosages of nano-CaCO3. when the content of nano-CaCO3 was 15%, the tempreture (To)at 5% weight loss and the tempreture (Td) at the most ratio of losing weight increased 2.51°C, 4.32 °C respectively, the most ratio of losing weight increased 0.05%/min.