title: Study by 1H NMR of the concentration of monomer-units on interface polymer grafted on silica using magic angle spinning and relaxation techniques.
abstract: The segmental motion of poly(ethylene oxide) grafted on silica has been investigated by 1H and 13C magnetic resonance. The local monomer units concentration on an interface is evaluated. Two independent techniques, namely magnetic relaxation and magic angle spinning, are used and give a good agreement for the physical parameters describing the monomer units concentration on the surface. This behavior has been studied as a function of molecular weight of the chains, and each time also as a function of temperature.
authors.affiliation: Université de Tunis, IPEIT, UR 0113/04, 2 rue Jawhar Let Nahrou, Montfleury, Tunis 1008, Tunisia. tahar.tajouri@ipeit.rnu.tn
authors.forename: T
authors.initials: T
authors.lastname: Tajouri
authors.forename: H
authors.initials: H
authors.lastname: Bouchriha
mesh_terms: D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008970:Molecular Weight; D011108:Polymers / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors
chemical_list: D011108:Polymers; D012822:Silicon Dioxide