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Poly(amidoamine) (PAMAM) dendrimers with amine endgroups (PAMAM-NH 2 ) are converted to starlike copolymers by grafting of monofunctional poly(ethylene glycol) (PEG) 'arms' onto the dendrimer endgroups. Generation 4, 7, and 10 dendrimers are converted to 60-arm, 235-arm, and 750-arm PAMAM/PEG stars, respectively. The dendrimer-stars are studied as polymer templates for stabilization of gold...
Polyethylene and other polyolefins have not been amenable to mass spectrometric characterization of molecular mass distribution due to the ineffectiveness of conventional methods of cationization. The lack of polar groups, unsaturation, and aromaticity excludes cationization methods that are used commonly for polymers. A new method is introduced in which an organic cation is covalently bonded to the...
The diffusion of linear polystyrene (PS) into its crosslinked counterpart was studied using both neutron reflectivity (NR) and forward recoil scattering (FRES). The penetrant molecular weights were monodisperse and ranged from 10 000 to 690 000 g mol -1 . The molecular weight between crosslinks was kept at 22 000 g mol -1 . The crosslinks were introduced by polymerizing...
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