Open AccessEffects of Side-Chain on Conformational Characteristics of Poly(3,5-Dimethyl-Phenyl Acrylate) in Toluene at 40℃
Author(s) -
Nasrollah Hamidi,
Stanley Ihekweazu,
Christopher A. Wiredu,
Onize H. Isa,
Kevin Watley,
Christopher C. Rowe,
Briante’ Nimmons,
Alexis Prezzy,
Traniqua Govan,
Shane Scoville,
Quentin Hills,
Judith D. Salley
Publication year - 2012
Publication title -
advances in chemical engineering and science
Language(s) - English
Resource type - Journals
eISSN - 2160-0392
pISSN - 2160-0406
DOI - 10.4236/aces.2012.24053
Subject(s) - intrinsic viscosity , toluene , viscometer , chemistry , polymer , macromolecule , random coil , polymer chemistry , thermodynamics , viscosity , crystallography , organic chemistry , physics , circular dichroism , biochemistry
The intrinsic viscosity [η] of poly(3,5-dimethylphenylacrylate) (35PDMPA)solutions were evaluated throughout the measurements of the flow times of toluene and polymer solutions by classical Huggins, and Kraemer’s methods using a Cannon-Ubbelohde semi-micro-dilution capillary viscometer in a Cannon thermostated water bath at 40℃ ± 0.02℃. The values of Huggins’ constant estimated ranged from 0.2 to 0.4 which were within expectations. The intrinsic viscosities and molecular weight relationship was established with the two-parameter classical models of Staudinger-Mark-Houwink-Sakurada and Stockmayer-Fixman. Conformational parameter C∞ and σ indicated 35PDMPA be semi flexible. Also, the rigidity of 35PDMPA was confirmed by Yamakawa-Fuji wormlike theory modified by Bohdanecky. The molecular parameters were estimated and compared. The results showed that 35PDMPA behaves like a semi-rigid polymer in toluene at 40℃ rather than a random coil flexible macromolecule