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Abstract
The drive form more efficient utilization of materials encourages an integrated design approach, with multifuctional use of materials. Thus cellular plastic may be asked to function simultaneously, as insulation and as load-bearing material. In such a case, creep can have an important effect. PVC foam is used as an example to show that compressive creep occurs by polymer flow, cell buckling, and compaction. There are time and temperature dependant, but density independent if normalized using a stress term. A consequence of creep is that the thermal insulation performance is impaired, as as result of the combined effect of the reduced thickness and increased conductivity of the densified foam.
The drive form more efficient utilization of materials encourages an integrated design approach, with multifuctional use of materials. Thus cellular plastic may be asked to function simultaneously, as insulation and as load-bearing material. In such a case, creep can have an important effect. PVC foam is used as an example to show that compressive creep occurs by polymer flow, cell buckling, and compaction. There are time and temperature dependant, but density independent if normalized using a stress term. A consequence of creep is that the thermal insulation performance is impaired, as as result of the combined effect of the reduced thickness and increased conductivity of the densified foam.
Date
9/1989
9/1989
Author(s)
M H Collins; A R Lyle
M H Collins; A R Lyle
Page(s)
20
20
Keyword(s)
cellular plastic; thermal performance; creep; gas composition
cellular plastic; thermal performance; creep; gas composition