Isotactic polypropylene (iPP) is a semicrystalline thermoplastic polymer characterized by regular, ordered molecular chain structure that provides superior stiffness and crystallinity compared to atactic variants. It is widely used in automotive components, consumer packaging, medical devices, and appliances where a balance of rigidity, chemical resistance, and cost-effectiveness is required. Engineers favor iPP over lower-grade polypropylene grades and competing polymers when moderate temperature resistance and good fatigue performance are needed without the expense of engineering plastics like nylon or PBT.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 287 | - | — | ||
Hardness (Vickers)(HV) | 125 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 41.63 | MPa | — | ||
Young's Modulus(E) | 2.014 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 268.7 | K | — | ||
Melting Point / Solidus(Tm) | 437.5 | K | — | ||
Maximum Service Temperature(Tmax) | 610.5 | K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.501 | - | — |