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Probing the Two-Stage Transition upon Crossing the Glass Transition of Polystyrene by Solid-State NMR
A two-stage transition upon crossing the glass transition of polystyrene with increasing temperature was precisely determined and
interpreted by using solid-state nuclear magnetic resonance (SSNMR), 1H-1H dipolar couplings based Double
Quantum-Filtered (DQF) and dipolar filter (DF) experiment and 13C
Chemical Shift Anisotropy (CSA) based centerband-only detection of exchange (CODEX) experiment ar...
http://www.polymer.cn//ss/sunpingchuan/publicationsshow_9032.html |
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“Glass transition and disorder-to-order phase transition behavior of poly(l-lactic acid) revealed by infrared spectroscopy”
A detailed analysis of the IR spectral changes of melt-quenched poly(l-lactic acid) (PLLA) sample is presented. It is found that the glass transition, cold crystallization, disorder-to-order and melting behavior of melt-quenched PLLA can be clearly revealed by choosing suitable characteristic bands and combing the 1st derivative manipulation. Of particular note, it is found that, there are c...
http://www.polymer.cn//ss/zhangjianming/publicationsshow_3471.html |
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Effect of Degree of Branching on the Thermoresponsive Phase Transition Behaviors of Hyperbranched Multiarm Copolymers: Comparison of Systems with LCST Transition Based on Coil-to-Globule Transition of Hydrophilic-Hydrophobic Balance
This work reports for the first
time the influence of degree of branching (DB) on the thermoresponsive phase
transition behaviors of hyperbranched multiarm copolymers. Two series of
PEHO-star-PEOs (series A) and PEHO-star-PDMAEMAs (series B) with the hydrophobic
DB-variable PEHO core and different kinds of linear arms (PEO arms or PDMAEMA
arms) were synthesized. It was found thes...
http://www.polymer.cn//ss/zhouyongfeng/publicationsshow_8103.html |
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Cononsolvency process of poly(nisopropylacrylamide): coil-globule transition evidenced by the scaling law
The cononsolvency involving polymers is a re-entrant type process in which polymers are under a non-solvencycondition in the mixtures of two solvents although either is a good solvent for polymers. A typical system ispoly(N-isopropylac...
http://www.polymer.cn/research/sy_info14654 |
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Different transition mechanisms and tunable wall thicknesses of block copolymer vesicles
Self-assembly of amphiphilic block copolymers result in a wide range of aggregates in aqueous solution,including spheres, rods, lamellae, vesicles, and large compound vesicles with an inverted core-shell structuresurrounded by hydrophilic surface.&nb...
http://www.polymer.cn/research/sy_info14601 |
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The influence of chain component on the sol-gel transition of symmetric triblock copolymer systems
Due to their wide application, such as in drug delivery, food processing, material templates, etc1, polymer physicalgels have attracted both experimental scientists and theorists’ attention2-4 , especially for the telechelic ABAtriblock copolym...
http://www.polymer.cn/research/sy_info14590 |
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Counterion Dynamics and Conformational Transition of Polyions
关键字：polyelectrolyte, coil-to-helix, sol-gel, dielectric
The natural bio-macromolecules in aqueous solutions are normally charged macroions surrounded with counterions. Such polyions perform conformational transition such as coil-to-helix, which is closely related with the thermodynamics and dynamics of the counterions. The coil-to-helix and the sol-gel transitions of the polyion dispersions of kappa-carrageenan have been revealed by the frequency d...
http://www.polymer.cn/research/ct_info1180 |
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Counterion Dynamics and Conformational Transition of Polyions
关键字：polyelectrolyte, coil-to-helix, sol-gel, dielectric
The natural bio-macromolecules in aqueous solutions are normally charged macroions surrounded with counterions. Such polyions perform conformational transition such as coil-to-helix, which is closely related with the thermodynamics and dynamics of the counterions. The coil-to-helix and the sol-gel transitions of the polyion dispersions of kappa-carrageenan have been revealed by the frequency d...
http://www.polymer.cn/research/dis_info18148 |
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Cononsolvency process of poly(nisopropylacrylamide): coil-globule transition evidenced by the scaling law
The cononsolvency involving polymers is a re-entrant type process in which polymers are under a non-solvencycondition in the mixtures of two solvents although either is a good solvent for polymers. A typical system ispoly(N-isopropylac...
http://www.polymer.cn/research/dis_info16933 |
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Different transition mechanisms and tunable wall thicknesses of block copolymer vesicles
Self-assembly of amphiphilic block copolymers result in a wide range of aggregates in aqueous solution,including spheres, rods, lamellae, vesicles, and large compound vesicles with an inverted core-shell structuresurrounded by hydrophilic surface.&nb...
http://www.polymer.cn/research/dis_info16881 |
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