Bingyong Han

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Name: 韩丙勇; Han, BingYong

Organization: Beijing University of Chemical Technology , China

Department: State Key Laboratory of Chemical Resource Engineering

Title: (PhD)

TOPICS

Polymer

Atom Transfer Radical Polymerization Radical Polymerization

Chemicals
References

High-Glass-Transition-Temperature Hydrocarbon Polymers Produced through Cationic Cyclization of Diene Polymers with Various Microstructures

Co-reporter:Yang Cai, Jianmin Lu, Gaifeng Jing, Wantai Yang, and Bingyong Han

Macromolecules October 10, 2017 Volume 50(Issue 19) pp:7498-7498

Publication Date(Web):September 21, 2017

DOI:10.1021/acs.macromol.7b01075

A series of prepolymers were treated with CF3SO3H to cationically cyclize adjacent diene–styrene/diene–diene units into main-chain cyclic units. Diene–diphenylethylene alternating copolymers synthesized using anionic copolymerization were first cyclized completely without intermolecular linking reactions. The cyclization produced much higher Tg values (approximately 200 °C) than those of cyclized random diene–styrene copolymers (approximately 130 °C). To eliminate the number of spacer carbons between cyclic repeating units, poly(1-phenyl-1,3-butadiene) (PPB) was used as a prepolymer in cationic cyclization. The Tg increased substantially from 200 to 271 °C as the 3,4-structure content increased from 8% to 80%. The cyclized PPB with high 3,4-structure content is the highest Tg hydrocarbon polymer yet reported. All results indicated that the backbone rigidity of the cyclic hydrocarbon polymer can be drastically increased by reducing the number of spacer carbons and increasing carbon sharing between cyclic repeating units.

Covalent Grafting Approach for Improving the Dispersion of Carbon Black in Styrene–Butadiene Rubber Composites by Copolymerizing p-(2,2′-Diphenylethyl)styrene with a Thermally Decomposed Triphenylethane Pendant

Co-reporter:Minglu Huang, Jianmin Lu, Bingyong Han, Ming Qiu, and Liqun Zhang

Industrial & Engineering Chemistry Research 2016 Volume 55(Issue 35) pp:9459

Publication Date(Web):August 16, 2016

DOI:10.1021/acs.iecr.6b02259

A facile approach for improving the dispersion of carbon black (CB) with a few functional groups in a rubber matrix was developed by preparing a new solution-polymerized styrene–butadiene-p-(2,2′-diphenylethyl)styrene (DPES) rubber (SBDR). The SBDR was shown to graft onto the surface of the CB through trapping a polymer radical formed by thermally dissociation of a triphenylethane pendant. The dispersion of CB in the rubber matrix was markedly improved by increasing the DPES content in SBDR, as demonstrated by transmission electron microscopy, small-angle X-ray scattering, and rubber process analysis. Furthermore, SBDR vulcanizates showed improved mechanical properties and good dynamic properties for tread rubber with increasing DPES content. This research provides a universal method for improving the dispersion of carbon materials containing few functional groups in polymer matrices.

Anionic polymerization of MMA initiated by organolithium/cuprum diphenylphosphide (Ph2PCu) and synthesis of its block copolymer

Co-reporter:Jianmin Lu;Zengbiao Huang;Yixian Wu ;Wangtai Yang

Journal of Applied Polymer Science 2012 Volume 125( Issue 3) pp:2085-2091

Publication Date(Web):

DOI:10.1002/app.36286

Abstract

Organolithium/cuprum diphenylphosphide (Ph₂PCu) was used as a novel initiator to polymerize methyl methacrylate (MMA) and styrene in tetrahydrofuran (THF) at −50 to −10°C. The polymerizations initiated by n-BuLi/Ph₂PCu, Ph₂PCu/Li (Ip)_3-6Li/Ph₂PCu, and PSLi/Ph₂PCu were studied in detail. The polymerization of alkyl methacrylate initiated by n-BuLi/Ph₂PCu showed a narrow molecular weight distribution (MWD) (1.08–1.25) and 100% initiation efficiency. The experimental number average molecular weight increased linearly with increasing [MMA]/[n-BuLi/Ph₂PCu]. After the second monomer addition, the molecular weight increased proportionally while the MWD remained constantly narrow. These results reveal partial living characteristics. Ph₂PCu/Li (Ip)_3-6Li/Ph₂PCu showed a similar behavior and was used to prepare PGMA-b-PBMA-b-PMMA-b-PBMA-b-PGMA successfully. The initiation efficiency of n-BuLi/Ph₂PCu for styrene was low. The macromolecular initiator PSLi/Ph₂PCu was prepared and PS-b-PMMA with a narrow distribution was synthesized. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012