Hexagonal columnar phase in 1,4-trans-polybutadiene: morphology, chain extension, and isothermal phase reversal

S. Rastogi, G. Ungar

    Research output: Contribution to journalArticleAcademicpeer-review

    44 Citations (Scopus)
    114 Downloads (Pure)

    Abstract

    Morphol., lamellar thickening, and the transition between the crystal and the hexagonal columnar phase were studied in 1,4-trans-polybutadiene (I) by optical and electron microscopy, time-resolved synchrotron x-ray diffraction, and DSC. I could form several-thousand-.ANG.-thick lamellas of the extended or nearly extended chain type. These could form either by direct growth from the melt or through annealing of thinner chain-folded lamellas, provided they were in the columnar phase. Lamellar thickness increased by several hundred .ANG. in soln.-crystd. mats immediately upon heating above the crystal-columnar transition, which contrasted with some previous reports on single crystals of I. The low-temp. crystal phase reappeared spontaneously on annealing above the temp. of the initial transition to the high-temp. columnar phase. [on SciFinder (R)]
    Original languageEnglish
    Pages (from-to)1445-1452
    JournalMacromolecules
    Volume25
    Issue number5
    DOIs
    Publication statusPublished - 1992

    Fingerprint Dive into the research topics of 'Hexagonal columnar phase in 1,4-trans-polybutadiene: morphology, chain extension, and isothermal phase reversal'. Together they form a unique fingerprint.

    Cite this