Product Details
Polypropylene (PP) is a high-molecular-weight polymer synthesized from propylene monomers. Based on polymerization techniques, its manufacturing is classified into five major processes: solution polymerization, slurry polymerization, bulk polymerization, gas-phase polymerization, and integrated bulk-gas-phase polymerization. Structurally, PP is mainly categorized into isotactic, syndiotactic, and atactic types. Isotactic polypropylene is the most widely adopted grade, occupying over 90% of total application markets.
Atactic polypropylene is well-suited for additives, adhesives and modifiers. Thanks to its high viscosity, favorable flow behavior and excellent coating capability, it functions as an efficient carrier for modified masterbatches. Syndiotactic polypropylene features high transparency, toughness and flexibility, while its stiffness and hardness are approximately half those of isotactic PP. It can be vulcanized in a manner similar to ethylene-propylene rubber, yielding elastomers with mechanical performance superior to traditional rubber materials.
Despite constraints on large-scale commercialization caused by its relatively high production cost, syndiotactic polypropylene exhibits great development potential. It is regarded as a hig-growth emerging segment within polypropylene resins and an innovative synthetic material for advanced polymer modification applications.
Product Parameter
| English Name | Polypropylene |
| English Synonyms | PROPYLENE RESIN;PROPYLENE, ISOTACTIC RESIN;POLYPROPYLENE;POLYPROPYLENE, ATACTIC;POLYPROPY LENE, PSS NANOREINFORCED;POLYPROPYLENE, ISOTACTIC;Polypropylene master batch,flame retarding;Po lypropylene,film grade |
| CAS Number | 9003-07-0 |
| Molecular Formula | C22H4203 |
| Molecular Weight | 42.08 |
| EINECS Number | 202-316-6 |
| Melting point | 157 °C |
| Boiling point | 120-132 °C |
| Density | 0.9 g/mL at 25 °C (lit.) |
| Refractive index | n20/D 1.49 (lit.) |
| Flash point | >470 |
| Storage conditions | -20°C |
| Appearance | Particles (spherical) |
| Color | red |
| Odor (Odor) | Odorless |
| Biological origin | human |
| Merck | 137,663 |
Product Application
Polypropylene boasts excellent processability and can be shaped via various molding methods to produce a broad spectrum of products for different application scenarios. Injection-molded PP is particularly prevalent, with general-grade polypropylene being the primary raw material for daily consumer goods.
Unmodified and modified polypropylene are extensively adopted across automotive, home appliance and industrial fields. For example, impact-modified PP is commonly used for automotive bumpers and wheel covers, whereas reinforced PP is applied in manufacturing dashboards, steering wheels, fan blades and handles.
