The difference between ABS plastic and polypropylene PP
In terms of product hardness and price, ABS plastic has higher hardness, better toughness, and higher gloss than PP plastic. The temperature resistance is almost the same. However, PP has better chemical resistance and lower cost
Different uses
Most ABS plastics are non-toxic and impermeable, but they are slightly saturated with steam and have a low water absorption rate. After soaking at room temperature for one year, the water absorption rate does not exceed 1%, and the physical properties remain unchanged. The surface of ABS resin products can be polished to achieve high gloss products. The strength is 3-5 times higher than ordinary plastic. ABS plastic is widely used in manufacturing and chemical industries such as machinery, electrical, textile, automotive, aircraft, and shipbuilding, while polypropylene PP plastic has good chemical stability. When PP plastic is corroded by concentrated sulfuric acid and concentrated nitric acid, it is relatively stable compared to other chemical reagents, but low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons, and chlorinated hydrocarbons can soften and shrink polypropylene. Meanwhile, as the crystallinity increases, its chemical stability improves, making polypropylene suitable for manufacturing various chemical pipelines and fittings with good anti-corrosion effect.
ABS plastics with different compositions are ternary copolymers of acrylonitrile (a), butadiene (b), and styrene (s). The relative content of the three monomers can be freely modified to produce various resins. ABS has common characteristics of three components. A gives it chemical corrosion resistance, heat resistance, and a certain degree of external hardness, B gives it high elasticity and toughness, s gives it the processing and molding characteristics of thermoplastic, and improves electrical performance. Therefore, ABS plastic is a "tough and hard" material, with readily available raw materials, good comprehensive performance, low price, and widespread application. PP plastic generally refers to polypropylene. The methyl groups arranged on the same side of the main chain of the molecule are called isotactic polypropylene. If the methyl groups are randomly arranged on both sides of the main chain of the molecule, it is called random polypropylene. When methyl groups are alternately arranged on both sides of the molecular main chain, they are called syndiotactic polypropylene.
So in ordinary material selection, we should fully consider the various properties of the product in order to reduce costs and improve product competitiveness.