High-temperature gel permeation chromatography of polyolefins
Further development of high-temperature gel permeation chromatography (HTGPC) methods for molecular weight (M) characterization of polyolefins, including poly(4-methyl-1-pentene) (PMP), polyethylene (PE), and polypropylene (PP), is described in this second interim topical report on HTGPC. Thermo-oxidative degradation of PMP caused by exposure to high temperatures during sample preparation and analysis has been reduced by lowering the initial solution temperature from 165 to 150{degrees}C. Alternative calibration methods for PE and PP based on well-characterized broad M standards have been developed. Results obtained from a longer single column packed with a combination of various pore-size packings to provide a linear calibration curve are compared with those from a bank of four conventional columns. 14 refs., 7 figs., 4 tabs.
- Research Organization:
- Allied-Signal Aerospace Co., Kansas City, MO (United States). Kansas City Div.
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00613
- OSTI ID:
- 5153191
- Report Number(s):
- KCP-613-4403; ON: DE92000660
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360600 -- Other Materials
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400100* -- Analytical & Separations Chemistry
ALKENES
CHROMATOGRAPHY
GEL PERMEATION CHROMATOGRAPHY
HYDROCARBONS
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PENTENES
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYPROPYLENE
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE