Thomas A Page, Melody Harrison, Mary Pat Moeller, Jacob Oleson, Richard M Arenas, Meredith Spratford
Service Provision for Children Who Are Hard of Hearing at Preschool and Elementary School Ages
Language, speech, and hearing services in schools
viscoelastic behaviors aqueous systems commercially available sodium carboxymethyl cellulose nacmc samples degrees substitution ds approximately 068 13 weightaverage molar masses mw higher 200 kg mol1 dissolved pure water aqueous sodium chloride solutions investigated wide concentration c range nacmc samples dependencies specific viscosity sp average relaxation time w reciprocal steadystate compliance je1 c discussed relationships sp c3 w c2 je1 c characteristic rod particle suspensions clearly observed range lower c critical gel behavior observed thus new concept based rheology rod particle suspensions employed interpret viscoelastic behaviors obtained c range context nacmc polymer molecules assumed behave extended rod particles length l diameter including effective electrostatic repulsive distances due dissociation na aqueous systems thus number density polymer molecules given cmw viscoelastic parameters sp w je1 calculated using theoretical model rod particle suspensions proposed doi edwards concept reasonably described viscoelastic data obtained study also groups using nacmc samples different ds mw values