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Preparation of thermoresponsive Fe3O4/P(acrylic acid–methyl methacrylate–N-isopropylacrylamide) magnetic composite microspheres with controlled shell thickness and its releasing property for phenolphthalein
In this work, Fe3O4/P(acrylic acid–methyl methacrylate–N-isopropylacrylamide) (Fe3O4/P(AA–MMA–NIPAm)) thermoresponsive magnetic composite microspheres have been prepared by controlled radical polymerization in the presence of 1,1-diphenylethene (DPE). The shell thickness of thermosensitive polymer (PNIPAm), which was on the surface of the microspheres, can be controlled by using DPE method. ...
http://www.polymer.cn//ss/zhangqiuyu/publicationsshow_7798.html |
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Thermo- and pH-responsive Behaviors of Aqueous Poly(acrylic acid)/Poly(4-vinylpyridine) Complex Material Characterized by ATR-FTIR and UV-Vis Spectroscopy
A novel thermo- and pH- responsive poly(acrylic acid) (PAA)/poly(4-vinylpyridine) (P4VP) aqueous material with an upper critical solution temperature (UCST) was developed in this study. It was found that the formation of the aqueous complex material was caused by the deprotonation of pyridinium groups of P4VP molecules and consequent hydrogen bonding formation between pyridine and carboxyl...
http://www.polymer.cn//ss/cenglxl/publicationsshow_7523.html |
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Synthesis and characterization of pH-sensitive poly(N-2-hydroxyethyl acrylamide)- acrylic acid (poly(HEAA/AA)) nanogels with antifouling protection for controlled-release
Major challenges in the development of effective stimuli-responsive nanogels as targeted drugand gene delivery carriers are to improve biocompatibility, stability, and controlled release during systemic circulation. In this work, biofunctional nanogels based on copolymers of poly(N-2-hydroxyethyl acrylamide) (polyHEAA) and acrylic acid (AA) with controlled size and morphol...
http://www.polymer.cn//ss/qiangchen/publicationsshow_6110.html |
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Various types of hydrogen bonds, their temperature dependence and water-polymer interaction in hydrated poly(acrylic acid) as revealed by H-1 solid-state NMR spectroscopy
Various types of hydrogen bonds, their temperature dependence and water-polymer interaction in hydrated poly(acrylic acid) (PAA) were systematically investigated using 1H CRAMPS solid-state NMR techniques in the temperature range from 25 to 110 °C. The 1H CRAMPS NMR methods are based on a recently developed continuous phase modulation technique for 1H-1H homonuclear dipolar decoupling. The 1H CRA...
http://www.polymer.cn//ss/sunpingchuan/publicationsshow_5154.html |
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Unimacromolucule exchange between bimodal micelles self-assembled by polystyrene-block-poly(acrylic acid) and polystyrene-block-poly(amino propylene-glycol methacrylate) in water
pubs.acs.org/doi/abs/10.1021/jp036355x
Unimacromolucule exchange between bimodal star micelles self-assembled by polystyrene-block-poly(acrylic acid) and polystyrene-block-poly(amino propylene-glycol methacrylate) in water has been studied by laser light scattering. Unimacromolucule exchange can take place in the mixture of the bimodal star micelle aqueous solution at 25 °C. Increasing temper...
http://www.polymer.cn//ss/zhangwangqing/publicationsshow_4065.html |
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Core-shell-corona micellar complexes between poly(ethylene glycol)-block-poly(4-vinyl pyridine) and polystyrene-block-poly(acrylic acid)
onlinelibrary.wiley.com/doi/10.1002/macp.200500368/abstract
The complexation between polystyrene-block-poly(acrylic acid) (PS-b-PAA) micelles and poly(ethylene glycol)-block-poly(4-vinyl pyridine) (PEG-b-P4VP) is studied and a facile strategy is proposed to prepare three-layered core–shell–corona micellar complexes. Micellization of PS-b-PAA in ethanol gives rise to spherical core&nda...
http://www.polymer.cn//ss/zhangwangqing/publicationsshow_4053.html |
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Double-responsive core-shell-corona micelles from self-assembly of diblock copolymer of poly(t-butyl acrylate-co-acrylic acid)-b-poly (N-isopropylacrylamide)
www.sciencedirect.com/science/article/pii/S0032386106005313
Self-assembly of poly(t-butyl acrylate-co-acrylic acid)-b-poly(N-isopropylacrylamide) [P(tBA-co-AA)-b-PNIPAM], which was obtained from part hydrolysis of PtBA-b-PNIPAM synthesized by sequential atom transfer radical polymerization (ATRP) was studied. Thermo- and pH-responsive core–shell–corona (CSC) micelles with different st...
http://www.polymer.cn//ss/zhangwangqing/publicationsshow_4048.html |
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Synthesis of porous poly(styrene-co-acrylic acid) microspheres through one-step soap-free emulsion polymerization: Whys and wherefores
www.sciencedirect.com/science/article/pii/S0021979711013920
Synthesis of porous poly(styrene-co-acrylic acid) (PS-co-PAA) microspheres through one-step soap-free emulsion polymerization is reported. Various porous PS-co-PAA microspheres with the particle size ranging from 150 to 240 nm and with the pore size ranging from 4 to 25 nm are fabricated. The porous structure of the microspheres is confi...
http://www.polymer.cn//ss/zhangwangqing/publicationsshow_4013.html |
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Effect of Acrylic Acid and Hydroxyethyl Methacrylate Modified Nano-SiO2 Particles on Poly(Methyl methacrylate-HEMA) Soap-free Emulsion Polymerization
Nano-SiO2 powder was modified with acrylic acid (AA) and hydroxyethyl methacrylate (HEMA), respectively. The kinetics of the soap-free emulsion polymerization of methyl methacrylate (MMA) and HEMA in the presence of unmodified or modified nano-SiO2 particles was investigated. The structure of the nano-SiO2 particles and the Poly(MMA-HEMA) composite emulsion was characterized by Fourier transform i...
http://www.polymer.cn//ss/zhangfaai/publicationsshow_3729.html |
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Polymer 2011:Fabrication and stability of porous poly(allylamine) hydrochloride (PAH)/poly(acrylic acid) (PAA) multilayered films via a cleavable-polycation template
Porous films were fabricated from nonporous layer-by-layer multilayers composed of a blend of positively charged disulfide-containing polyamidoamine and poly(allylamine hydrochoride), and negatively charged poly(acrylic acid), followed by removal of cleavable disulfide-containing polycation after incubation in 1 mM DTT solution. The thickness of original multilayered films decreased with the incre...
http://www.polymer.cn//ss/huangshiwen/publicationsshow_2923.html |
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