Speichermodul TPU
Unter Verwendung einfacher trigonometrischer Beziehungen ist eine Aufteilung in den Realteil G'' und den Imaginärteil G'''' möglich, die mit den Gln. (13) und (14) vorgenommen wird. Der Realteil G'' wird als Speichermodul bezeichnet und ist
Does hard segment content predict mechanical properties of elastomeric thermoplastic polyurethane (TPU)?
Mechanistic understanding of the mechanical properties of elastomeric thermoplastic polyurethane (TPU) rely on the hard segment content (HSC) as the sole predictor of mechanical properties for a given chemistry, regarding the TPU morphology as a nanocomposite of hard domains in a softer matrix.
What is thermoplastic polyurethane (TPU)?
Thermoplastic polyurethanes (TPUs) offer exciting possibilities for meeting the manufacturing challenges of a fast-changing world. from shoes, seals and films to filters, conveyor belts and cables. coating, injection molding, extrusion, film and compounding application requirements. 1. What is TPU?
What are the characteristics of a TPU system?
The TPU was considered as a two-phase system with a hard particle phase and softer matrix. The hard particle phase had a volume fraction equal to the HSC and a modulus of 5000 MPa. The soft matrix phase had a volume fraction, fm, equal to f m = 1 − H S C and a modulus of 10 MPa.
Are TPU properties related to HS content?
It is well established that TPU properties are closely related to the HS content (HSC). As HSC is increased, the elastic properties like Young's modulus and the rubbery plateau modulus increase, while some elastomeric properties like elongation and stress at break decrease.
What is the interphase modulus of TPU?
For the modeling in this work, a value of 100 MPa was chosen to represent the interphase modulus, Ei, as a conservative estimate of the average properties. The SM of TPU is primarily composed of the long macrodiol units and, depending on the degree of phase separation, some chain extender and diisocyanate units.
What is polyether TPU?
Polyether TPUs are slightly lower in specific gravity than polyester and polycaprolactone grades. They offer low temperature flexibility and good abrasion and tear resilience. They are also durable against microbial attack and provide excellent hydrolysis resistance – making them suitable for applications where water is a consideration.
