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Journal of Applied Polymer Science 1997, 65(9), 1667-1674
Prepolymers of poly(ethylene oxide) (Pre-PEO) were synthesized by reacting azoisobutyronitrile (AIBN) with poly(ethylene glycol) (PEG), and their structures were characterized by IR and UV. The molecular weight of pre-PEO was related to the feed ratio and reaction time. These prepolymers can be used to prepare block copolymers—poly(ethylene oxide) -block-poly(butyl acrylate) (PEO-b-PBA) by r...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_1599.html |
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Journal of Applied Polymer Science 2002, 86, 2296-2306.
The purpose of this research was to synthesize and characterize a novel class of four-arm, star-shape biodegradable polymers having double-bond functionality as a precursor for free-radical polymerization, with unsaturated monomers or macromers or photocrosslinking for network formation. The synthesis involved two basic steps. First, hydroxyl-functionalized four-arm poly(_-caprolactone) s (PPCL-OH...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_1609.html |
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Journal Applied Polymer Science 1998, 70(8), 1427-1436
Poly(ethylene glycol)-block-poly(butyl acrylate) synthesized by radical polymerization in a one-step procedure were characterized by gel permeation chromatography, infrared, 1H-NMR spectroscopy, and differential scanning calorimetry (DSC). The crystalline property, emulsifying property, and phase transfer catalytic effect in the Williamson reaction were studied. It was found that the crystallinity...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_1603.html |
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Journal of Biomaterials Science, Polymer Edition 1999, 10(4), 501-512
polycaprolactone/poly(ethylene oxide) polylactide tricomponent copolymer (PCEL) with different compositions were synthesized by copolymerization of caprolactone and L-lactide in the presence of poly(ethylene glycol) using stannous octoate as a catalyst. The copolymers were purified and characterized by various analytical techniques such as GPC, FT-IR. 1H NMR, 13C NMR, DSC and X-ray diffractometry....
http://www.polymer.cnt//ss/langmeidong/publicationsshow_1604.html |
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Journal of Polymer Science Part A: Polymer Chemistry 2011 49, 1582-1590
Graphene nanosheets offer intriguing electronic, thermal and mechanical properties and are expected to find a variety of applications in high-performance nanocomposite materials. The great challenge of exfoliating and dispersing pristine graphite or graphene sheets in various solvents or matrices can be achieved by facilely and properly chemical functionalization of the carbon nanosheets. Here we ...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_2991.html |
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Journal of Polymer Science, Part A: Polymer Chemtry 2001, 39(24), 4214-4226
The goal of this research is to synthesize biodegradable polymers that would have nitroxyl radical biological functions. Linear aliphatic polyesters were chosen as the starting materials. The hydroxyl-terminated polylactide/e-caprolactones (PBLC-OHs) were first synthesized by melt ring-opening copolymerization in the presence of benzyl alcohol and stannous octoate. PBLC-OHs were used as the precur...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_1605.html |
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Journal of Polymer Science Part A: Polymer Chemistry 2012, 50(3), 571
Reversible addition-fragmentation chain transfer (RAFT) polymerization is a more robust and versatile approach than other living free radical polymerization methods for synthesis of well-defined homo-, gradient, block, star-shaped and more complex structural polymers, like micro(nano)gels and polymer brushes. Thus the resultant polymers with thiocarbonylthio-terminated groups are readily tailored ...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_4257.html |
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Journal of Polymer Science Part A: Polymer Chemistry 2011, 49, 5293
A series of copolymers containing ε-caprolactone (CL) and 4-methyl-ε-cap-rolactone (MeCL) were synthesized by ring-opening polymerization (ROP) using Tin(Ⅱ)bis(2-ethylhexanoate)(Sn(Oct)2) or Novozym 435 as catalyst. The molecular structure and weight of copolymers were determined by Nuclear Magnetic Resonance (NMR) and size exclusion chromatography (SEC), respectively. Our kinetic...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_4154.html |
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Journal of Polymer Science Part A: Polymer Chemistry 2011, 49(22), 4747
A mild and efficient strategy is presented for growing thermo-sensitive polymers directly from the surface of exfoliated graphene oxide (GO). This method involves the covalent attachment of Br-containing initiating groups onto the surface of GO sheets followed by in situ growing poly[poly(ethylene glycol) ethyl ether methacrylate] (PPEGEEMA) via single-electron- transfer living radical polymerizat...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_4150.html |
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Journal of Polymer Science. Part A, Polymer Chemistry 2002, 40(8), 1127-1141
Hydroxyl-functionalized three-arm poly(_-caprolactone)s (PGCL-OHs) were synthesized by the ring-opening polymerization of _-caprolactone in the presence of glycerol (as the core) and stannous octoate. The effect of the feed ratio of _-caprolactone to glycerol on the ring-opening polymerization was studied. These three-arm PGCL-OHs were then converted into double-bond-functionalized three-arm poly(...
http://www.polymer.cnt//ss/langmeidong/publicationsshow_1608.html |
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