𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Effects of strain rate and temperature upon tensile properties of acetal copolymers

✍ Scribed by K. F. Wissbrun

Publisher
Society for Plastic Engineers
Year
1983
Tongue
English
Weight
486 KB
Volume
23
Category
Article
ISSN
0032-3888

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The strength and elongation to break of an acetal copolymer were measured at four elongation rates, from 0.2 to 20 in./min, at temperatures from 239 K to 339 K. Both strength and elongation results could be reduced to master curves by means of time‐temperature superposition. The temperature dependence of the shift factors was given by an equation of the WLF form, with parameters close to those found for most amorphous polymers, at a reference temperature equal to the γ‐transition temperature of the polymer. Extrapolation to much higher testing rates and to much slower creep rates was satisfactory. Similar but less extensive tests were run on two other samples with different molecular weights. The yield stress was independent of molecular weight, but elongation increased with increasing molecular weight at all conditions.

πŸ“œ SIMILAR VOLUMES

Strain rate, temperature, and sample siz
Strain rate, temperature, and sample size effects on compression and tensile properties of frozen sand
✍ Richard A. Bragg; O.B. Andersland πŸ“‚ Article πŸ“… 1981 πŸ› Elsevier Science 🌐 English βš– 628 KB

Selection of material properties for use in design of frozen earth structures has been a limiting factor for some field applications. In particular, the mechanical properties governing the behavior of a frozen soil structure subjected to bending stresses are of interest. The effects of strain rate,

Effect of heat pretreatment and strain r
Effect of heat pretreatment and strain rate on tensile properties of polycarbonate sheet
✍ Mitsuru Yokouchi; Yasuji Kobayashi πŸ“‚ Article πŸ“… 1981 πŸ› John Wiley and Sons 🌐 English βš– 492 KB πŸ‘ 2 views

The effects of heat pretreatment and ambient gas (air and vacuum) on selected properties of the polycarbonate sheet have been studied. Changes in tensile properties as functions of heat pretreatment temperature (up to 16OOC) and strain rate (wide range of 1.7 X -13.1 m/sec = 0.29 -2.3 x 104 %/sec) w

Effects of temperature and strain rate o
Effects of temperature and strain rate on transverse tensile properties of H4LM graphite tested in helium and in vacuum
✍ Morton C Smith πŸ“‚ Article πŸ“… 1964 πŸ› Elsevier Science 🌐 English βš– 716 KB

Curves are presented showing the ultimate tensile strength of molded H4LM graphite in the transverse orientation ("with the grain") as a function of temperature, for tests made in vacuum and in static helium at nominal engineering strain rates of 0.005, 0.5 and 2.0/min. Temperature ranges considered

Temperature and strain rate dependence o
Temperature and strain rate dependence of the tensile yield stress of PVC
✍ Francisco Povolo; Gustavo Schwartz; Γ‰lida B. Hermida πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 615 KB

Data on the tensile yield behavior of poly(viny1 chloride) (PVC), reported in the literature, are interpreted in terms of a model involving a cooperative movement of several independent structural units, all with the same activation enthalpy. This analysis leads to physical parameters such as the in