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• W2142175650 endingPage "1188" @default.
• W2142175650 startingPage "1182" @default.
• W2142175650 abstract "Stereoblock polybutadiene (PBD) composed of amorphous equibinary cis−1,4/1,2 PBD (e-PBD, soft) and crystalline syndiotactic 1,2-PBD (s-1,2-PBD, hard) segments is synthesized through one-pot sequential polymerization with iron(III)2-ethylhexanoate/triisobutylaluminum/diethyl phosphate [Fe(2-EHA)3/Al(i-Bu)3/DEP] catalyst system. The first-stage polymerization of 1,3-butadiene (BD) is carried out at a low [Al]/[Fe] ratio to give amorphous e-PBD block, and sequentially, the in situ addition of excessive Al(i-Bu)3 and BD to the living polymerization system give rise to a second crystalline s-1,2-PBD block. The length of each block is controllable by adjusting cocatalyst and monomer feed ratio. The syndiotactic pentad content is in the range of 63.8–76.6% and increases with the length of s-1,2-PBD block. The copolymer exhibits glass transition temperature (Tg) around −40 °C and melting point (Tm) around 168 °C originating from e-PBD and s-1,2-PBD blocks, respectively. The incompatibility between s-1,2-PBD and e-PBD blocks as well as the crystallization of s-1,2-PBD block induce the microphase separation in stereoblock PBD. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 1182–1188" @default.
• W2142175650 created "2016-06-24" @default.
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• W2142175650 date "2015-03-12" @default.
• W2142175650 modified "2023-09-26" @default.
• W2142175650 title "Synthesis and characterization of soft-hard stereoblock polybutadiene with Fe(2-EHA)₃ /Al(<i>i</i> -Bu)₃ /DEP catalyst system" @default.
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• W2142175650 doi "https://doi.org/10.1002/pola.27533" @default.
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