Decreasing out-of-round in poly(alpha-methylstyrene) mandrels by increasing interfacial tension

Citation
M. Takagi et al., Decreasing out-of-round in poly(alpha-methylstyrene) mandrels by increasing interfacial tension, FUSION TECH, 38(1), 2000, pp. 46-49
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Nuclear Emgineering
Journal title
FUSION TECHNOLOGY
ISSN journal
0748-1896 → ACNP
Volume
38
Issue
1
Year of publication
2000
Pages
46 - 49
Database
ISI
SICI code
0748-1896(200007)38:1<46:DOIPMB>2.0.ZU;2-N
Abstract
Currently, poly(alpha-methylstyrene) mandrel precursors are suspended in a salt-containing water bath during curing. Matching the density of the precu rsors to their bath almost, but not quite, eliminates shell sagging caused by gravity. This sagging is opposed by the interfacial tension between the plastic containing oil solution and the water bath, but the tension is bare ly adequate to give satisfactory sphericity. We found that adding a small a mount (<0.1 wt%) of high-molecular-weight poly(acrylic acid) to the water b ath substantially increased the interfacial tension. Combining that change with a gentler shell curing process enabled consistent production of more s pherical mandrels.