Guangyuan Zhou
Chinese Academy of Sciences
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Featured researches published by Guangyuan Zhou.
RSC Advances | 2017
Guoqiang Wang; Min Jiang; Qiang Zhang; Rui Wang; Guangyuan Zhou
A series of biobased copolyesters, poly(ethylene sebacate-co-ethylene 2,5-furandicarboxylate) (PESF), were synthesized from available biobased ethylene glycol (EG), sebacic acid (SA) and 2,5-furandicarboxylic acid (FDCA) through a two-step melt polycondensation method. The composition, molecular weight and its distribution, crystal structure, and crystallization behavior of PESFs were investigated by 1H NMR, GPC, WAXD, and DSC methods, respectively. Tensile properties were also evaluated. While increasing the content of the FDCA unit, the glass transition temperatures of PESFs increased and the crystallization rates of PESFs decreased. Compared with poly(ethylene sebacate) (PES), PESF20 showed two melting peaks due to the formation of secondary crystals (small and imperfects crystals) caused by the incorporation of FDCA during the isothermal crystallization process. POM data showed that the nucleation density of PESF10 and PESF20 increased and the size of spherulites decreased due to the chain irregularity caused by randomization distribution with the introduction of FDCA. However, the crystal structure remained unchanged. Ring-banded spherulites were not detected for PESF20 in a wide temperature range (28–44 °C) as the incorporation of FDCA can restrict lamellar twisting and scrolling of PES segments. The thermal transition and mechanical properties of copolymers are tunable with the composition.
Polymer Bulletin | 2012
Dongliang Li; Jinhua Lei; Honghua Wang; Min Jiang; Guangyuan Zhou
Nanofibrous ultrahigh molecular weight polyethylene (UHMWPE) was synthesized via Ziegler–Natta catalyst anchoring on MCM-41 and SBA-15 as supported catalysts, respectively. These supported catalysts exhibited high activity at different temperatures and Al/Ti ratios, and showed different polymerization kinetics behaviors which were well explained by their different pore structures. The ultrahigh molecular weight of polyethylene might be due to the restrained spaces of the supported catalysts mesopores prohibiting the polymer chains transfer reaction. The obtained nanofibrous morphology might be for the high enough stress generated in the mesopores extruding the polymer out to form.
Journal of Polymer Science Part A | 2012
Min Jiang; Qian Liu; Qiang Zhang; Chong Ye; Guangyuan Zhou
Archive | 2012
Guangyuan Zhou; Min Jiang; Xi Liu; Qiang Zhang; Chong Ye
Journal of Polymer Science Part A | 2011
Jinhua Lei; Dongliang Li; Honghua Wang; Zhuqian Wang; Guangyuan Zhou
Polymer Degradation and Stability | 2017
Guoqiang Wang; Min Jiang; Qiang Zhang; Rui Wang; Xiaobo Tong; Songyi Xue; Guangyuan Zhou
Polymer Degradation and Stability | 2017
Guoqiang Wang; Min Jiang; Qiang Zhang; Rui Wang; Guangyuan Zhou
Archive | 2012
Guangyuan Zhou; Min Jiang; Xiaolong Su; Xi Liu; Qiang Zhang
Archive | 2010
Jinhua Lei; Guangyuan Zhou; Dongliang Li
Archive | 2010
Jinhua Lei; Dongliang Li; Guangyuan Zhou