NDLI: Silicone Macroinitiator in Atom Transfer Radical Polymerization of Styrene and Vinyl Acetate: Synthesis and Characterization of Pentablock Copolymers

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Silicone Macroinitiator in Atom Transfer Radical Polymerization of Styrene and Vinyl Acetate: Synthesis and Characterization of Pentablock Copolymers

Content Provider	Springer Nature Link
Author	Semsarzadeh, Mohammad Ali Amiri, Sahar
Copyright Year	2012
Abstract	Poly(dimethylsiloxane) (PDMS) based pentablock copolymers has been synthesized via atom transfer radical polymerization (ATRP) of styrene (St) and vinyl acetate (VAc) telomer at 60 °C in the presence of CuCl/PMDETA as a catalyst system. Vinyl acetate telomer was prepared from controlled radical telomerization with Co(acac)$_{2}$/DMF with PDI ≈ 1.3. Poly(vinyl acetate-b-styrene-b- dimethylsiloxane- b- styrene-b-vinyl acetate) (PVAc-b-PSt-b-PDMS-b-PSt-b-PVAc) pentablock copolymers provided a method to design block copolymer with PDMS segment, allowing us for the adjustments in the flexibility by PDMS with a large effect from its softening point (T$_{g}$), or rigidity of styrene monomer and a higher melting temperature (T$_{m}$). Penta-block copolymers were characterized by FTIR, $^{1}$HNMR, DSC, and GPC techniques. Meanwhile, the number-average molecular weights calculated from $^{1}$HNMR spectra were in very good agreement with the theoretically calculated value. It could be concluded from the $^{1}$HNMR and DSC spectrum that the pentablock copolymers of PVAc-b-PSt-b-PDMS-b-PSt-b-PVAc consisting of a PDMS center block and PSt and PVAc terminal blocks were synthesized.
Starting Page	432
Ending Page	438
Page Count	7
File Format	PDF
ISSN	15741443
Journal	Journal of Inorganic and Organometallic Polymers and Materials
Volume Number	23
Issue Number	2
e-ISSN	15741451
Language	English
Publisher	Springer US
Publisher Date	2012-11-30
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Poly(vinyl acetate) Poly(dimethylsiloxane) Polystyrene Atom transfer radical polymerization Block copolymers Inorganic Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Polymers and Plastics

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