Analytical services

Molecular weight determination
Molecular weights, number (Mn) and weight average (Mw) and distribution (Mw/Mn) by size exclusion chromatography (SEC) is performed in THF, DMF, or in aqueous solvent. The SEC equipments are linked to on-line triple detectors: a Varian RI-4 refractive index, Viscotek 270 dual detector laser scattering and viscosity differential pressure (DP).
Sample Requirments:  100-200 mg
Prices:   US$ 250/sample soluble in THF
                US$ 300/sample soluble in CHCl3, or water or DMF

Results are delivered within 2-3 working days.
1H NMR Analysis
1H NMR analysis is carried out on Varian 500MHz instrument
Sample Requirments:   100-200 mg
Prices:     US$ 50/sample soluble in deuterated THF/ CHCl3/water/DMF/DMSO
Fourier Transform Infrared Spectroscopy (FTIR)
Nicolet spectrophotometer (Avatar 330) connected to a computer with OMNIC software for the acquisition of spectra.
Sample Requirments:  50-100 mg
Prices:    35 US$/Sample

Results are delivered within 2-3 working days
Thermal Analysis
TA Q100 Differential Scanning Calorimeter (DSC) is used to measure Tg, Tm, Tc, heat capacity and enthalpy at temperature range of -90 to 400 oC..
Sample Requirments:  20-50 mg
Prices:    US $50/sample
                 US $225/5 samples

Results are delivered within 2-3 working days.
Rheological measurement
AR2000Ex Rheometer (TA Instruments) can measure oscillatory and steady state rheology of polymers as function of frequency and temperature. We can provide steady flow, viscoelastic characterization and mathematical modeling of unknown sample.
Sample Requirments:   5 ml or 5 g
Prices:     US$ 150/sample

Results are delivered within 2-3 working days.