@Article{JPM.2019.36.03.7,
AUTHOR = {KM. MEENU, DIBYENDU S. BAG, REKHA LAGARKHA},
TITLE = {Synthesis of Functional Photoactive Polysilane Copolymers with Disperse Yellow 7 Methacrylate and Study of their Optical, Photophysical and Thermal Properties},
JOURNAL = {Journal of Polymer Materials},
VOLUME = {36},
YEAR = {2019},
NUMBER = {3},
PAGES = {275--292},
URL = {http://www.techscience.com/jpm/v36n3/56085},
ISSN = {0976-3449},
ABSTRACT = {Functional photoactive polysilane copolymers of poly(methylphenylsilane) (PMPS) and disperse
yellow 7 methacrylate (DY7MA) were synthesized using UV-technique. In the same manner
functional polysilane copolymers of poly(methylphenylsilane-co-dimethylsilane) (CPS) and
disperse yellow 7 methacrylate (DY7MA) were also synthesized. By the UV irradiation polysilanes
(PMPS and CPS) give rise to silyl macroradicals which initiate the polymerization of photoactive
monomer (DY7MA). The synthesized samples were characterized by FTIR, NMR, and UV-Vis
spectroscopy. The molar mass of synthesized photoactive functional polysilane copolymers is
of order of 103
gm/mol. They exhibited multimodal optical and photoluminescence functional
properties. Optical absorbance was observed at 336 nm due to σ-σ* transition of σ-conjugation
of Si-Si main chain.The other absorbance at 276 nm is due to π-π* transition of aromatic ring
associated with polysilanes and DY7MA polymeric unit.The electronic absorption was observed
at 367 nm for π-π* and n-π* transition of azobenzene chromophores of DY7MA. The
photoemission spectra are observed at λ<sub>em</sub> = 405, 428 and 454 nm for the excitation energy of
332 and 370 nm. Such functional polysilane copolymers exhibited two glass transition
temperatures indicating the formation of block copolymers. The synthesized functional polysilane
copolymers are thermally stable upto 300º
C. Such functional photoactive block copolymers
may find novel optoelectronic applications.},
DOI = {10.32381/JPM.2019.36.03.7}
}