Wiley
0887-624X
1099-0518
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Các bài báo tiêu biểu
Synthesis and properties of polyimide–clay hybridAbstract A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmorillonite intercalated with an ammonium salt of dodecylamine. Montmorillonite consists of stacked silicate sheets about 2000 Å in length, 10 Å in thickness. In this hybrid, montmorillonite is di... ... hiện toàn bộ
Tập 31 Số 10 - Trang 2493-2498 - 1993
Thiol–enes: Chemistry of the past with promise for the futureAbstract The photopolymerization of mixtures of multifunctional thiols and enes is an efficient method for the rapid production of films and thermoset plastics with unprecedented physical and mechanical properties. One of the major obstacles in traditional free‐radical photopolymerization is essentially eliminated in thiol–ene polymerizations because the polymerizat... ... hiện toàn bộ
Tập 42 Số 21 - Trang 5301-5338 - 2004
Synthesis and barrier properties of poly(ε‐caprolactone)‐layered silicate nanocompositesAbstract A new polymer‐ceramic nanocomposite has been synthesized consisting of well‐dispersed, two‐dimensional layers of an organically modified mica‐type silicate (MTS) within a degradable poly(ε‐caprolactone) matrix. A protonated amino acid derivative of MTS was used to promote delamination/dispersion of the host layers and initiate ring‐opening polymerization of... ... hiện toàn bộ
Tập 33 Số 7 - Trang 1047-1057 - 1995
Synthesis of nylon 6–clay hybrid by montmorillonite intercalated with ϵ‐caprolactamAbstract It was found that montmorillonite was intercalated with ϵ‐caprolactam. X‐ray diffraction revealed that the chain axes of the ϵ‐caprolactam were parallel to the montmorillonite plates. The intercalated montmorillonite was swollen by molten ϵ‐caprolactam at 200°C. ϵ‐Caprolactam and 6‐aminocaproic acid (accelerator) were polymerized with the intercalated montm... ... hiện toàn bộ
Tập 31 Số 4 - Trang 983-986 - 1993
Discovery of dendrimers and dendritic polymers: A brief historical perspective*Abstract A brief historical perspective relating the discovery of dendrimers and other dendritic polymers is presented. Dendritic polymers are recognized as the fourth major class of macromolecular architecture consisting of four sub‐ classes, namely, (1) random hyperbranched, (2) dendrigrafts, (3) dendrons, and (4) dendrimers. The previous literature is reviewed wi... ... hiện toàn bộ
Tập 40 Số 16 - Trang 2719-2728 - 2002
Mechanism and kinetics of the crosslinking reaction between biopolymers containing primary amine groups and genipinAbstract The reaction mechanism of chitosan, bovine serum albumin (BSA), and gelatin with genipin (a natural crosslinking reagent) was examined with infrared, ultraviolet–visible, and 13 C NMR spectroscopies; protein‐transfer reaction mass spectrometry; photon correlation spectroscopy; and dynamic oscillatory rheometry. Two reactions that proceed... ... hiện toàn bộ
Tập 41 Số 24 - Trang 3941-3953 - 2003
Physicochemical characterization of α‐chitin, β‐chitin, and γ‐chitin separated from natural resourcesAbstract We isolated α‐chitin, β‐chitin, and γ‐chitin from natural resources by a chemical method to investigate the crystalline structure of chitin. Its characteristics were identified with Fourier transform infrared (FTIR) and solid‐state cross‐polarization/magic‐angle‐spinning (CP–MAS) 13 C NMR spectrophotometers. The average molecular weights... ... hiện toàn bộ
Tập 42 Số 14 - Trang 3423-3432 - 2004
Synthesis and characterization of micron‐sized monodisperse superparamagnetic polymer particles with amino groupsAbstract Micron‐sized monodisperse superparamagnetic polyglycidyl methacrylate (PGMA) particles with functional amino groups were prepared by a process involving: (1) preparation of parent monodisperse PGMA particles by the dispersion polymerization method, (2) chemical modification of the PGMA particles with ethylenediamine (EDA) to yield amino groups, and (3) impr... ... hiện toàn bộ
Tập 43 Số 15 - Trang 3433-3439 - 2005
Hyperbranched polymers—All problems solved after 15 years of research?Abstract Fifteen years of research on hyperbranched polymers in the group of Brigitte Voit are described, with a focus first on hyperbranched polyester synthesis and then on the addition and cycloaddition reactions used for the preparation of the hyperbranched structure. The characterization of structural details and bulk, solution, and thin‐film properties is highl... ... hiện toàn bộ
Tập 43 Số 13 - Trang 2679-2699 - 2005
Synthesis of monodisperse poly(divinylbenzene) microspheresAbstract Highly crosslinked monodisperse poly(divinylbenzene) microspheres were produced by precipitation polymerization with acetonitrile as solvent. The radical initiators AIBN, BPO, and ADVN were used. The process does not require stabilizers of any type, and produces monodisperse particles with diameters between 2 and 5 μm, depending on the conditions. These mic... ... hiện toàn bộ
Tập 31 Số 13 - Trang 3257-3263 - 1993