English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The rate/temperature dependent fracture behaviour of plain and glass-filled polystyrene has been investigated over the crack speed ( a ) range of 10 −6 to 10 −2 m sec −1 and in the temperature ( T ) range of 296 to 363 K. The K c (a, T) relationships obtained, where K c is the stress intensity factor at fracture, are shown to follow those given by the Williams/Marshall relaxation crack growth model and the toughness-biased rate theory. Crack propagation in both materials is shown to be controlled by a β -relaxation molecular process associated with crazing. Crack instabilities observed in plain polystyrene are analysed successfully in terms of isothermal-adiabatic transitions at the crack tip. Fracture initiation experiments are also conducted in which the effects of organic liquids on the fracture resistances of both plain/glass-filled polystyrene have been determined. Good correlations between K i 2 ( K i being the crack initiation stress intensity factor) and δ s , solvent solubility parameter, of various liquid environments have been obtained, which give a minimum K i 2 value at δ s ≈ δ p , where δ p is the solubility parameter of the polymer. For a given temperature, liquid environment and crack speed, the glass-filled polystyrene is shown to possess greater resistances to crack propagation than plain polystyrene

Effects of rate, temperature and absorption of organic solvents on the fracture of plain and glass-filled polystyrene