Crystallization and dynamic mechanical properties of polypropylene/polystyrene blends modified with maleic anhydride and styrene

Abstract

Polypropylene (PP)/polystyrene (PS) blends modified with reactive monomers, such as maleic anhydride (MAH) and styrene (St), and in situ formed PP/PS blends were prepared by melting extrusion. The crystallization and melting behavior and the dynamic mechanical properties of the PP/PS blends, including the structure of the grafted copolymer, were investigated with differential scanning calorimetry, dynamic mechanical analysis, and Fourier transform infrared. The results indicated that the addition of MAH hardly influenced the crystallization temperature of PP in the blends, but the addition of MAH and St increased the crystallization temperature of PP in its blends. The blends showed no remarkable variety for the melting temperature, but the shapes of the melting peaks were influenced by the addition of the reactive monomers. In addition, a significant increase in the storage and loss moduli of all the modified PP/PS blends was observed.

Effects of polystyrene‐b‐poly(ethylene/propylene)‐b‐polystyrene compatibilizer on the recycled polypropylene and recycled high‐impact polystyrene blends

“…Although the results of T g obtained by DSC and dynamic mechanical analysis are different, the change tendency of the difference value is the same. The proximity of 2 glass transition temperatures above indicates that SEPS can significantly improve the compatibility of the R‐PP/R‐HIPS blends …”

Comparison of processing and mechanical properties of polypropylene/recycled acrylonitrile butadiene rubber/rice husk powder composites modified with silane and acetic anhydride compound

“…Better adhesion yields more restriction to deformation capacity of the matrix in the elastic zone and increasing modulus. According to Zhang et al, 25 the addition of anhydride groups even at low levels (1-2%) increases the nucleation capacity of fillers for PP and alters the crystal morphology of PP around the fillers. Consequently, surface crystallization dominates over bulk crystallization and a transcrystalline can be formed around the fillers.…”

The effect of polypropylene maleic anhydride on polypropylene/(recycled acrylonitrile butadiene rubber)/(sugarcane bagasse) composite

“…This may be associated with the good distribution and chemical bonding of PPMAH with the filler and PP matrix. The chain entanglements of the PP backbone also were partially the reason for the good holding of the hydrophobic matrices and hydrophilic SCB filler [19,20]. Figure 5 shows the E b of the PP/NBRr/SCB composite with PPMAH compatibilization.…”