Direct Observation of Polymer Network Structure in Macroporous N-Isopropylacrylamide Gel by Raman Microscopy [0.03%]
拉曼显微镜直接观察N-异丙基丙烯酰胺凝胶的大孔网络结构
R Appel,W Xu,TW Zerda et al.
R Appel et al.
The Raman microscopy technique is used to characterize the temperature-induced evolution of the pore structures of a macroporous N-isopropylacrylamide (NIPA). The gel is synthesized using a suspension of 45 wt % toluene and 55 wt % pregel N...
Poly(ethylene oxide) Grafted to Silicon Surfaces: Grafting Density and Protein Adsorption [0.03%]
接枝到硅表面的聚环氧乙烷：接枝密度和蛋白质吸附行为
SJ Sofia,V Premnath V,EW Merrill
SJ Sofia
Poly(ethylene oxide) (PEO) polymer, in linear and star form, was covalently grafted to silicon surfaces, and the surfaces were tested for their ability to adsorb proteins. Linear PEG of molecular weight 3400, 10 000, and 20 000 g/mol and st...
Effect of Molecular Weight on Spectroscopic and Spectroelectrochemical Properties of Regioregular Poly(3-hexylthiophene) [0.03%]
分子量对规整聚(3-己基噻吩)光谱和光电子学性质的影响
M Trznadel,A Pron,M Zagorska et al.
M Trznadel et al.
Using experimentally established sequence of extractions, we were able to fractionate regioregular poly(3-hexylthiophene) (R-P3HT) into four fractions differing significantly in their molecular weight (Mn) and exhibiting low polydispersity ...
PJ Farrington,CJ Hawker,JMJ Fréchet et al.
PJ Farrington et al.
The zero shear melt viscosity, eta0, for a variety of dendritic poly(benzyl ether) macromolecules has been measured. The viscosity of low generation dendrimers exhibits a strong molecular mass, M, dependence, yet, direct proportionality bet...
SJ Cooper,EDT Atkins,MJ Hill
SJ Cooper
Crystals were grown of the 5-amide, 9-amide, and 17-amide nylon 6 monodisperse oligoamides and investigated using electron microscopy (real space and diffraction) and X-ray diffraction. Analyses of the data allowed us to determine the cryst...
Chain Mobility in Polymer Systems: On the Borderline between Solid and Melt. 2. Crystal Size Influence in Phase Transition and Sintering of Ultrahigh Molecular Weight Polyethylene via the Mobile Hexagonal Phase [0.03%]
聚合物体系中的链扩散：介于固相和熔体之间。超高分子量聚乙烯的晶粒尺寸对移动六方相转变和烧结的影响
S Rastogi,L Kurelec,PJ Lemstra
S Rastogi
Polymorphism is a well-established phenomenon in crystalline materials and is important for pharmaceutical and polymeric materials. In our study concerning the processability of polymers, we came across an unusual observation related to pol...
Nuclear Magnetic Resonance Detection of Two Distinctly Different Chains in the Orthorhombic Crystalline Phase of Polyethylenes [0.03%]
正交晶型聚乙烯中两条性质明显不同的链的核磁共振检测法
L Hillebrand,A Schmidt,A Bolz et al.
L Hillebrand et al.
Several commercial and noncommercial, high- and low-density and ultraoriented polyethylene samples, as well as polyethylene samples with inorganic fillers, have been investigated by inversion-recovery cross-polarization magic angle spinning...
Phase Separation and Dewetting of Weakly Incompatible Polymer Blend Films [0.03%]
弱不相容聚合物共混膜的相分离和脱湿现象
P Müller-Buschbaum,SA O&#x;Neill,S Affrossman et al.
P Müller-Buschbaum et al.
The phase separation and dewetting of thin films of blends of deuterated polystyrene (dPS) and poly(p-methylstyrene) (PpMS) were investigated during annealing. The surface morphology, obtained from atomic force microscopy and phase measurem...
An NMR Self-Diffusion Investigation of Aggregation Phenomena in Solutions of Ethyl(hydroxyethyl)cellulose [0.03%]
乙基(羟乙基)纤维素溶液聚集现象的NMR自扩散研究
M Nydén,O Söderman
M Nydén
Water solutions of ethyl(hydroxyethyl)cellulose have been investigated with the PFG NMR technique and by means of 1H NMR relaxation measurements. The echo decays in PFG experiments have been recorded for EHEC with concentrations ranging fro...
Shear-Induced Orientational Order in a Polystyrene/Benzene-d6 Solution As Observed by 2H NMR [0.03%]
利用氘核磁共振观测剪切力作用下聚苯乙烯/重水苯溶液中侧链的取向序参数变化
ter Beek LC,FM Linseisen
ter Beek LC
Using a home-built Couette-type shear cell we studied the behavior of a concentrated solution of polystyrene in benzene-d6 under shear. Deuterium NMR revealed a shear-dependent splitting of the benzene-d6 signal, indicating partial orientat...