Abstract: GPC coupled with multi angle laser light scattering was used to determine molecular weight and distribution of PAMMO. The light scattering principle and procedure was introduced. At the same time some key experimental factors such as dn/dc, concentration, and flow rate were discussed. It is found that when dn/dc is 0.0929, the concentration is 20~60 mg/mL, the flow-rate is 1 mL/min and under the condition that the selection of effective peak area is the occurrence of the differential peak versus the disappearance of laser peak, satisfactory results were obtained.

Key words: laser light scattering; GPC; PAMMO; molecular weight; molecular weight distribution

Author: LIU Hong-ni, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China

E-mail: winny_521@163.com

Analysis and Testing Technology and Instruments, Vol. 16, No. 1, 2010, 27-31.