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Solution-grown crystal of poly[bis(4-isopropylphenoxy)phosphazene]

✍ Scribed by Hitoshi Nakamura; Tadakazu Miyata; Koichiro Yonetake; Toru Masuko; Morio Kojima

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
572 KB
Volume
16
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

The structural features of poly[bis(4‐isopropylphenoxy)phosphazene] (PB(4‐ip)PP) have been studied by electron microscopy, X‐ray diffraction and differential scanning calorimetry techniques. Its orthorhombic lattice constants are determined as follows: a = 3,14 nm, b = 1,14 nm, c = 0,992 nm. The space group of this polymer is suggested to be P 2~1~2~1~2~1~–D, and the molecular conformation of the chains possibly to be (trans~3~cis)~2~. This polymer exhibits a crystal/crystal transition at 86Β°C below its T(1) transition (120Β°C). The thermal behavior is similar to the characteristics of poly[bis(p‐methoxyphenoxy)phosphazene].

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