Control of Bubble Size and Location in Nano-/Microscale Cellular Poly(propylene)/Rubber Blend Foams
✍ Scribed by Tomoyuki Nemoto; Jun Takagi; Masahiro Ohshima
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 649 KB
- Volume
- 293
- Category
- Article
- ISSN
- 1438-7492
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✦ Synopsis
Abstract
Plastic foam with nano‐/micro‐scale cellular structures was prepared from a poly(propylene) (PP)/propylene‐ethylene copolymer (PER) blend by controlling bubble nucleation sites and bubble growth in disperse PER domains. Batch foaming experiments using a CO~2~ pressure quench method were conducted at room temperature. The bubble size and location were highly controlled in disperse PER domains by exploiting the differences in CO~2~ solubility and viscoelasticity between the PER domains and the PP matrix. The average cell diameter of PP/PER blend foams can be controlled within 0.5–2 µm by the PP/PER ratio, depressurization rate, and foaming temperature.
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