The polycondensation of I.-aspartic acid (ASP) with 6-aminocaproic acid (ACA) using ophosphoric acid produced poly(succinimide-co-6 -aminocaproic acid). The yield of the MeOHinsoluble copolymer decreased from 99 to 52% and that of the MeOH-soluble one increased from 9 to 47%, with increasing molar r
Synthesis of poly(succinimide-amide) by acid-catalyzed polycondensation of L-aspartic acid and aromatic aminocarboxylic acid
β Scribed by Takeshi Nakato; Masayuki Tomida; Atsushi Kusuno; Minako Shibata; Toyoji Kakuchi
- Publisher
- Springer
- Year
- 1998
- Tongue
- English
- Weight
- 76 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0170-0839
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The bulk polycondensation of L-aspartic acid (ASP) with an acid catalyst under batch and continuous conditions was established as a preparative method for producing poly(succinimide) (PSI). Although sulfuric acid, p-toluenesulfonic acid, and methanesulfonic acid were effective at producing PSI in a
## Abstract The structure of poly(aspartic acid) prepared by thermal polycondensation has been studied by means of nmr spectroscopy. The analysis of the ^13^Cβnmr spectra of the polymer at various pH values and comparison with the spectrum of poly(Ξ±βLβaspartic acid) revealed that the polymer contai
## Abstract Directly starting from Lβlactic acid (LA) and Lβaspartic acid (Asp), biodegradable material poly(lactic acidβ__co__βaspartic acid) [P(LAβ__co__βAsp)] was synthesized via melt polycondensation. The synthetic conditions, including type and dosage of catalyst, temperature, and time of copo