Abstract
The topic of this paper refers to the influence of the plasticizer and the processing mode upon the characteristics of the poly(vinyl chloride) (PVC) composites. Thereby, in this study two types of industrial plasticizers were used to highlight their influence upon the properties of final composites. The employed lubricant was stearic acid, the most common and cheapest additive used in the industry for cables manufacturing. For economic reasons, calcium carbonate of 2 m size was used as reinforcing agent. Further on, two sets of samples were prepared, targeting the influence of the processing mode upon the properties of final composites. Beside the structure (by FT-infrared), thermal behavior (thermal analyses and differential scanning calorimetry) and mechanical properties (dynamic mechanical analyses, tensile strength and elongation at break) of PVC composites, the limiting oxygen index (LOI) and the overall morphology of the samples were also investigated.
Highlights
The topic of this paper refers to the influence of the plasticizer and the processing mode upon the characteristics of the poly(vinyl chloride) (PVC) composites
PVC is intensively used nowadays, due to its low cost, fire resistance, chemically resistance to acids, salts, bases, fats, and alcohols, making it resistant to the corrosive effects of sewage, electrical protecting properties, good insulation properties, good tensile strength, ability to use it in rigid, semi flexible or flexible state and because it can be colored in a wide range of colors [1,2,3,4,5]
It can be observed that the compound with diisononyl phthalate (DINP) had a higher decrease of intensity compared to dioctyl terephthalate (DOTP)-based composites
Summary
For this research the following materials were used: - PVC Ongrovil S5070 from Borsod Chem (K-value 70.4); Diisononyl phthalate (DINP) as plasticizer (LG Chem); Dioctyl terephthalate (DOTP) as plasticizer (Chem Flexx); Ca-Zn salt as heat stabilizer (Baeropan MC 91446 KA/3, Baerlocher); Calcium carbonate particles of 2 m (CaCO3) as reinforcing agent (Omya Calcita); Stearic acid (Stera Chemicals) as lubricant. The test specimens were prepared by melting and mixing PVC with the heat stabilizer, reinforcing agent, plasticizer and lubricant. The temperature of roll milling depends on the final use of end product. The roll milling smoothed the product by rolling followed by compression at 170 °C to form sheets with dimension 150×150×1 mm
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