کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5187387 | 1381128 | 2009 | 6 صفحه PDF | دانلود رایگان |
We have synthesized low-molecular-weight diblock copolymers of polystyrene-block-poly(dimethylsiloxane) with total molecular weights <12Â kg/mol and PS volume fractions of â¼0.2. We have investigated the phase behavior of the PS-PDMS in its pure state and with up to 10Â wt% of C60 added. The C60 was shown to selectively segregate into the PS phase only although its solubility limit is â¼1Â wt%. Although the C60 aggregates above 1Â wt%, the cylindrical morphology observed in the pure copolymer bulk samples persists in the C60-copolymer composites even up to 10Â wt% C60 loading. In thin films, the pure copolymer possesses a highly ordered morphology with grains hundreds of microns across. When C60 is blended with the copolymer the high degree of order rapidly decreases due to increasing numbers of defects observed.
Journal: Polymer - Volume 50, Issue 17, 12 August 2009, Pages 4199-4204