AMME1362 Chapter Notes - Chapter 15: Elastic Modulus, Spherulite, Viscoelasticity

• School: University of Sydney
• Department: Aeronautical Engineering (Mechanical)
• Course: AMME1362
• Professor: Xiaozhou Liao

Document Summary

Side notes: viscoelastic behavior is dependant on both time and temperature. Separating these lamellae are areas of amorphous material; adjacent lamellae are connected by tie chains that pass through these amorphous regions. Chapter 15- characteristics, applications and processing of polymers: elastic/plastic deformations of spherulitic polymer: Chapter 15- characteristics, applications and processing of polymers: discuss the influence of the following factors on polymer tensile modulus and/or strength (a) molecular weight, (b) degree of crystallinity, (c) predeformation and (d) heat treating of undeformed materials. Molecular weight of the number-average molecular weight: for many polymers tensile strength increases with increasing molecular weight. Mathematically ts is a function: where (cid:1846)(cid:1845) is tensile strength at infinite molecular weight and a is a constant. The behavior described by this equation is explained by increase chain entanglements with rising (cid:3041) . It affects the extent of the intermolecular secondary bonding.