Studies on morphology of single crystals of ladder-like polyphenylsilsesquioxane (PPSQ) by polarized optical microscopy

Authors
Li, GZ Yamamoto, T Nozaki, K Hikosaka, M
Citation
Gz. Li et al., Studies on morphology of single crystals of ladder-like polyphenylsilsesquioxane (PPSQ) by polarized optical microscopy, MACRO CH P, 201(12), 2000, pp. 1283-1285
Citations number
8
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULAR CHEMISTRY AND PHYSICS
ISSN journal
10221352 → ACNP
Volume
201
Issue
12
Year of publication
2000
Pages
1283 - 1285
Database
ISI
SICI code
1022-1352(20000818)201:12<1283:SOMOSC>2.0.ZU;2-4
Abstract
This paper reports the first observation on morphology of single crystals o f ladder-like polyphenylsilsesquioxane (PPSQ) by polarized optical microsco py. These crystals prepared from benzene solution are cubic or pyramidal, w hose bases are parallelograms with acute angles of 70 degrees and 60 degree s, while those pyramidal shaped crystals formed from toluene solution have also parallelogram-like basal planes with small acute angles of 39 degrees and 26 degrees. Most pyramidal crystals exhibit fringes, sectors, stripes o r colorful stripes.