Plastic composites are mainly advantegous materials for processing. Due to the low processing temperature and familiar processing equipment, the plastics can be modified in various ways to achieve their unique properties. From an industrial perspective, it is essential to produce low-cost materials with specific properties. As polymer composites containing natural filler, such as lignocellulosic waste materials, are so easy to resource, it is crucial to further investigate such materials to create those unique properties.
By comparing roles of ingredients of lignocellulosic materials, lignin appears to be the most promising one. The presence of both hydroxyl and methoxy groups can be beneficial for material from a chemical point of view by increasing reactivity between components in a composite or by giving the composite specific properties.
Scope of the research was investigation structural and chemical examination of polyethylene blends containg raw materials. Polyethylene has been used for this research as a polymeric material which does not interact with lignin-containing filler. For this reason, it was easy to determine how the filler dispersed in a polymer matrix and which chemical groups were present in the composite material after it was processed. Structure of composites and presence of functional groups in polymer blends has been determined.