Title:
MOLECULAR WEIGHT MEASUREMENT METHOD AND SOLVENT FOR USE IN MEASUREMENT
Document Type and Number:
WIPO Patent Application WO/2019/225357
Kind Code:
A1
Abstract:
In this molecular weight measurement method, a sample liquid in which a solvent is mixed with a sample comprising a polyester or a polyester degradation product is prepared in a first step S101. The solvent used comprises chloroform and 2,2,2-trifluoroethanol and has an organic base added thereto. The organic base is at least one of a primary amine, a secondary amine, a tertiary amine, and a heterocyclic amine. Next, each of the amount of terephthalic acid terminals and the amount of hydroxyl terminals in the sample liquid is measured by nuclear magnetic resonance spectroscopy for hydrogen atoms in a second step S102. Next, the amount of terephthalic acid terminals and the amount of hydroxyl terminals measured in the second step S102 are used to calculate the number average molecular weight of the sample in a third step S103.
Inventors:
ISHII AZUSA (JP)
MIWA TAKASHI (JP)
MIWA TAKASHI (JP)
Application Number:
PCT/JP2019/018736
Publication Date:
November 28, 2019
Filing Date:
May 10, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01N24/08
Foreign References:
| JP2017219517A | 2017-12-14 | |||
| JP2001201471A | 2001-07-27 | |||
| JP2006045513A | 2006-02-16 | |||
| JP2008224284A | 2008-09-25 | |||
| JP2001126534A | 2001-05-11 |
Other References:
A.W. BIRLEY ET AL.: "Unsaturated polyesters based on terephthalic acid: 2. Quantitative characterization of prepolymers by proton magnetic resonance spectroscopy", POLYMER, vol. 19, 1978, pages 1433 - 1436, XP025889092, DOI: 10.1016/0032-3861(78)90096-4
C JACKSON ET AL.: "Size Exclusion Chromatographic Mobile Phase Optimization for Nylon Using Online Light Scattering and Viscometry Detectors", POLYMERIC MATERIALS SCIENCE AND ENGINEERING, vol. 69, 1993, pages 270 - 271
C JACKSON ET AL.: "Size Exclusion Chromatographic Mobile Phase Optimization for Nylon Using Online Light Scattering and Viscometry Detectors", POLYMERIC MATERIALS SCIENCE AND ENGINEERING, vol. 69, 1993, pages 270 - 271
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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