Hexagonal columnar phase in 1,4-trans-polybutadiene: morphology, chain extension, and isothermal phase reversal
نویسندگان
چکیده
منابع مشابه
On the rectangular-hexagonal columnar phase transition in disc-like liquid crystals
2014 We report the isobaric binary phase diagram for two disc-like mesogens, hexa-n-octyloxytriphenylene and hexa-n-octanoyloxytriphenylene, which was studied by means of optical texture observations, differential scanning calorimetry and X-ray diffraction measurements. They all confirm the presence of a direct transition between an hexagonal ordered columnar phase and a rectangular disordered ...
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The thermal properties of cis-1,4-polybutadiene (cis-PBD) were investigated in dependence of content of cis units and of linearity of the main chain. cis-PBD grades containing a fraction of cis-segments ranging from 93 to 98 %, and with linear or branched chains, were analyzed. Upon isothermal crystallization from the melt at -26 °C for 1 h, followed by cooling to below the glass transition tem...
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ژورنال
عنوان ژورنال: Macromolecules
سال: 1992
ISSN: 0024-9297,1520-5835
DOI: 10.1021/ma00031a014