Isotactic polypropylene (iPP) is a semicrystalline thermoplastic polymer characterized by a highly ordered molecular structure that gives it superior stiffness and thermal performance compared to atactic or random polypropylene grades. It is widely used across automotive, packaging, consumer goods, and appliance industries where a balance of rigidity, chemical resistance, and processability is needed at moderate temperatures. Engineers select iPP over lower-grade polypropylenes when components require improved dimensional stability and heat resistance, and over engineering plastics when cost and ease of molding are priorities.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 389.9 | - | — | ||
Flexural Strength (MOR)(σf) | 4.828 | ksi | — | ||
Hardness (Vickers)(HV) | 100 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 5.286 | ksi | — | ||
Young's Modulus(E) | 194.5 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 27.54 | °F | — | ||
Melting Point / Solidus(Tm) | 326.5 | °F | — | ||
Maximum Service Temperature(Tmax) | 644.7 | °F | — | ||
Thermal Conductivity(k) | 0.09822 | BTU/(hr·ft·°F) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 6.300 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.490 | - | — |