Ye, Hai-Mu; Wang, Jing; Wang, Cai-Shui; Li, Hong-Fang
Unique Isodimorphism of Poly(decamethylene succinate-ran-decamethylene fumarate): Large Pseudoeutectic Region and Fantastic Crystallization/Melting Behavior
Poly(decamethylene succinate-ran-decamethylene fumarate)s (PDSFs) were synthesized, and their structure and crystallization behavior were systematically studied. All polyesters possess high crystallizability irrespective of composition and display the widest pseudoeutectic region that has been reported to date. Nevertheless, both melting point– and crystallization temperature–composition…
High Performance Thermoplastic Elastomers with Biomass Lignin as Plastic Phase
Huang, Jinhao; Liu, Weifeng; Qiu, Xueqing
For the first time, the coordination-based energy sacrificial bonds have been constructed in the interface between lignin and polyolefin elastomer for preparing a new class of high performance thermoplastic elastomers (TPEs) with biomass lignin as the hard plastic phase. The coordination bonds not only promoted the dispersion of lignin, but…
Liquid crystalline side-chain triblock copolymers consisting of a nematic central subblock edged by photochromic azobenzene-containing fragments: their synthesis, structure and photooptical behaviour
Boiko, N. I.; Bugakov, M. A.; Chernikova, E. V.; Piryazev, A. A.; Odarchenko, Ya I.; Ivanov, D. A.; Shibaev, V. P.
For the first time, symmetrical photosensitive fully liquid crystalline side chain triblock copolymers (pAzo-b-pPhM-b-pAzo) and random copolymers (pAzo-ran-pPhM) with nematogenic phenyl benzoate (PhM) and photosensitive smectogenic azobenzene containing groups (Azo) were synthesized by the combination of RAFT polymerization and subsequent chemical modification. The central block of synthesized…
Immobilization of the enzyme invertase in SBA-15 with surfaces functionalized by different organic compounds
Ribeiro, Livia M. O.; Falleiros, Larissa N. S. S.; de Resende, Miriam M.; Ribeiro, Eloízio J.; Almeida, Renata M. R. G.; da Silva, Antonio O. S.
The search for appropriate supports for enzyme immobilization has attracted increasing interest in the field of biocatalysis. Immobilized enzymes are catalysts of enormous industrial interest because they combine the advantages of heterogeneous catalysis with the high selectivity and mild operational conditions of enzymes. This study evaluated the use of different…
Evolution of morphology and open-circuit voltage in alloy-energy transfer coexisting ternary organic solar cells
Xia, Benzheng; Yuan, Liu; Zhang, Jianqi; Wang, Zaiyu; Fang, Jin; Zhao, Yifan; Deng, Dan; Ma, Wei; Lu, Kun; Wei, Zhixiang
The oligomer-type small molecule PDT2FBT-ID is applied in a polymer/small molecule/fullerene ternary system. The PTB7-Th/PDT2FBT-ID/PC71BM ternary active layer shows complementary absorption spectra, enhanced face-on orientation and energy transfer properties. Compared to the binary system, the FF of the ternary system is improved from 66.72% to 76.14% and the Jsc is…
Effect of high molecular weight on pore formation and various properties of microporous membrane used for lithium-ion battery separator
Xu, Guan; Ding, Lei; Wu, Tong; Xiang, Ming; Yang, Feng
In this article, iPP cast films with high molecular weight in middle layer were prepared to investigate the effect of high molecular weight component on pore formation and mechanical strength. The results of DSC, SEM and 2D-XRD indicated that higher molecular weight and die draw ratio (DDR) would not alter…
Effects of Interconnected Polymer Nanopores Leading to Different Degrees of Confined Polymerization
Wang, Kui; Lei, Jinhua; Nie, Heran; Shen, Lu; Chen, Peng; Zhou, Guangyuan
In this study, different degrees of ethylene-confined polymerization (non-confined, slightly confined, and highly confined) are presented in porous polymer microspheres (PPMs) with an interconnected tri-modal pore structure. First, three catalysts, Cp2ZrCl2, Cp2TiCl2, and TiCl4, are attached to the interface of PPMs to form a nano-confined space for ethylene polymerization. Then…
High molecular weight poly(butylene succinate-co-furandicarboxylate) with 10mol% of BF unit: Synthesis, crystallization-melting behavior and mechanical properties
Peng, Shuangbao; Bu, Zhiyang; Wu, Linbo; Li, Bo-Geng; Dubois, Philippe
In this study, high molecular weight poly(butylene succinate-co-furandicarboxylate) with 10mol% of butylene furandicarboxylate unit (PBSF10) was synthesized and its crystal structure and crystallization-melting behaviors were investigated by means of WAXD, SAXS, DSC and POM. The tensile properties were also assessed. The crystal structure of PBSF10 is found to be the…
Controlling Crystal Microstructure To Minimize Loss in Polymer Dielectrics
Miranda, Daniel F.; Zhang, Shihai; Runt, James
A model semicrystalline polymer, poly(ethylene naphthalate) (PEN), was used to examine how morphological factors inhibit chain segment relaxations that contribute to dielectric loss. This was achieved by manipulating the extent of crystallization and the crystalline microstructure through a combination of annealing and uniaxial drawing and investigating the effects on dielectric…
Highly Selective Continuous Flow Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in a Pt/SiO2 Coated Tube Reactor
Bai, Yang; Cherkasov, Nikolay; Huband, Steven; Walker, David; Walton, Richard; Rebrov, Evgeny;
A novel continuous flow process for selective hydrogenation of α, β-unsaturated aldehyde (cinnamaldehyde, CAL) to the unsaturated alcohol (cinnamyl alcohol, COL) has been reported in a tube reactor coated with a Pt/SiO2 catalyst. A 90% selectivity towards the unsaturated alcohol was obtained at the aldehyde conversion of 98.8%. This is…