Hyperstructured Organic Materials Research Center and Department of Materials Science and Engineering Seoul National University Seoul 151-742 KoreaThe Korean Fiber SocietyFibers and PolymersKim KH, Jo WH. Optimization of molecular structure of polythiophene- graft-PMMA for effective compatibilization of SAN...
These compounds present an octupolar structure consisting of a triarylamine core bearing two 3,39-bis(trifluoromethyl)phenyl arms and a third group with varying electron-withdrawing strength (H , CN , CHO , NO2 , Cyet , Vin). The 2PA cross-sections, measured by using the femtosecond open-...
2). This congruence confirms that the preservation of cell wall structure in the extract. It also suggests that the polarizing radical does not diffuse through the membrane but preferentially localizes in the cell wall. The minor differences can be ascribed to the fact that only the W4 and W6...
The frictional properties of a homologous series of poly(n-alkyl methacrylates) (PnAMA) and a series of poly(methyl methacrylate) (PMMA) films, cast from a variety of solvents, are characterized. The choice of polymer film was driven by the consideration of the possible mechanisms for the acc...
Bruns, W. and Bansal, R., “Molecular Dynamics Study of a Single Polymer Chain in Solution,”J. Chem. Phys.,74, 2064 (1981). Article CAS Google Scholar Bywater, S. and Toporowski, P. M., “Effect of Stereostructure on Glass Transition Temperatures of PMMA,”Polymer,13, 94 (1972...
The fracture toughness of polymethyl methacrylate, PMMA, has been measured over a wide range of testing speed (from /.K ≅ 4-/.K ≅ 50 × 106lb/in.32/sec) and temperature (from −19 to +21°C) in air and inert environments, using single edge notch, double cantilever beam and ...
第二章 高聚物的聚集态结构Structure of molecular aggregation of polymers,聚集态结构:高分子链之间的排列和堆砌 结构,也称为超分子结构。 聚集态结构的变化导致材料的性能变化。 加工中赋予材料以什
In this study, spherical nanocrystalline cellulose (SNC) was successfully prepared by the hydrolysis of microcrystalline cellulose, then SNC was grafted with MA and MMA to prepare novel high-oil-absorbing resin SNC-g-P(MA-co-PMMA). The structure, surface morphology, oil absorbency and thermal ...
On the other hand, owing to the framework of PMMA, the absorbance of the PMMA structure reduces the mechanical strength, causes roughened surface morphologies, and alters the aesthetic properties11,12. Moreover, multiple mechanical wear and fatigue fractures resulting from the accumulation of cyclic ...
RESULTS AND DISCUSSION Optical properties The structure of the ACzEs and the ultraviolet–visible absorption spectra of the ACzEs in PMMA are shown in Figure 1. The spectra of the ACzE/PMMA films contain a broad absorption region that extends from 350 to 600 nm. NACzE has a maximum at ...