Effect of porous zeolite on temperature-dependent physical properties of polypropylene/octadecane (PP/OD) composite films

Abstract

Abstract. Polymeric materials with temperature-dependent gas permeabilities using a phase change material are designed and their applicability as a packaging system investigated. Polypropylene/octadecane/zeolite (PP/OD/ZL) composite films were prepared via extrusion process. ZL was used as a filler to enhance the dispersion and interfacial interaction between the OD and the PP originating from different flowabilities during the extrusion process. (FTIR) and (WAXD) analyses showed that the incorporation of ZL increased the interfacial interaction between PP and OD, resultantly enhancing the thermal stability, mechanical properties, and the oxygen transmittance rate and mechanical properties after contact with food simulants and thermal treatment. When the temperature was elevated from 10 to 30°C, oxygen and water vapor transmittance rate of the composite films increased sharply because of the influence of the OD content. It was surmised that temperaturedependent permeation jump caused by increasing of segmental mobility of OD phase and converting the crystalline structure to an amorphous one of OD phase in the composite films. However, the permeation jump in the composite films was weakened as the ZL content increased. These results are related to changes in the interfacial interaction and crystallinity in the composite films due to the addition of ZL.

Study of Physical, Mechanical, and Barrier Properties in Linear Low-Density Polyethylene Mixed with Silver Zeolite Nanoparticles (Ag-zeolite) Film

“…As a result, the internal structure was more organized than LDPE, contributing to better barrier properties (4) . Kim et al (2018) touched upon the physical properties (DSC) of composite mixed with zeolite agent related to OTR and WVTR of the composite (28) , which was consistent with DSC in this research, as shown in [Figure 2 (a), (b)]. Thus, it is possible that this might not also affect the OTR and WVTR rates of plastic films.…”