Synthesis and Characterization of Amphiphilic Biodegradable Copolymer, Poly(aspartic acid-co-lactic acid)

An amphiphilic biodegradable polymer, poly(aspartic acid‐co‐lactic acid) (PAL), was synthesized by simply heating a mixture of aspartic acid (Asp) and L‐lactide without additional catalysts or solvents. The unique branched architecture comprising succinimide units and lactic acid units was confirmed...

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Published inMacromolecular bioscience Vol. 3; no. 1; pp. 34 - 43
Main Authors Shinoda, Hosei, Asou, Yukiko, Suetsugu, Akio, Tanaka, Kimiko
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 01.01.2003
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Abstract An amphiphilic biodegradable polymer, poly(aspartic acid‐co‐lactic acid) (PAL), was synthesized by simply heating a mixture of aspartic acid (Asp) and L‐lactide without additional catalysts or solvents. The unique branched architecture comprising succinimide units and lactic acid units was confirmed by IR and NMR spectroscopy. A copolymer of sodium aspartate and lactic acid (PALNa) was prepared by reacting PAL with an aqueous sodium hydroxide solution. The PAL was soluble in many organic solvents, while the PALNa was soluble in methanol and water. The hydrolytic degradation behavior of PAL varied with the copolymer composition. A higher Asp content resulted in a faster molecular weight decrease, and introducing glycolic acid units accelerated the degradation rate. Microphotograph of microsphere of PAL‐1/5.
AbstractList An amphiphilic biodegradable polymer, poly(aspartic acid‐co‐lactic acid) (PAL), was synthesized by simply heating a mixture of aspartic acid (Asp) and L‐lactide without additional catalysts or solvents. The unique branched architecture comprising succinimide units and lactic acid units was confirmed by IR and NMR spectroscopy. A copolymer of sodium aspartate and lactic acid (PALNa) was prepared by reacting PAL with an aqueous sodium hydroxide solution. The PAL was soluble in many organic solvents, while the PALNa was soluble in methanol and water. The hydrolytic degradation behavior of PAL varied with the copolymer composition. A higher Asp content resulted in a faster molecular weight decrease, and introducing glycolic acid units accelerated the degradation rate. Microphotograph of microsphere of PAL‐1/5.
Abstract An amphiphilic biodegradable polymer, poly(aspartic acid‐ co ‐lactic acid) (PAL), was synthesized by simply heating a mixture of aspartic acid (Asp) and L ‐lactide without additional catalysts or solvents. The unique branched architecture comprising succinimide units and lactic acid units was confirmed by IR and NMR spectroscopy. A copolymer of sodium aspartate and lactic acid (PALNa) was prepared by reacting PAL with an aqueous sodium hydroxide solution. The PAL was soluble in many organic solvents, while the PALNa was soluble in methanol and water. The hydrolytic degradation behavior of PAL varied with the copolymer composition. A higher Asp content resulted in a faster molecular weight decrease, and introducing glycolic acid units accelerated the degradation rate. Microphotograph of microsphere of PAL‐1/5. magnified image Microphotograph of microsphere of PAL‐1/5.
Author Shinoda, Hosei
Asou, Yukiko
Tanaka, Kimiko
Suetsugu, Akio
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  givenname: Yukiko
  surname: Asou
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  givenname: Akio
  surname: Suetsugu
  fullname: Suetsugu, Akio
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  givenname: Kimiko
  surname: Tanaka
  fullname: Tanaka, Kimiko
  organization: Mitsui Chemical Analysis & Consulting Service Inc., Nagaura, Sodegaura City, Chiba 299-0265, Japan
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Issue 1
Keywords Biological properties
Lactone copolymer
Property composition relationship
Molecular structure
Biodegradability
Cyclopolymerization
Lactic acid copolymer
Condensation polymerization
Aspartic derivative copolymer
Experimental study
In vitro
Hydrolysis
Chemical modification
Preparation
Aspartic acid
Imide copolymer
Carboxylate copolymer
Aliphatic copolymer
Amphiphilic polymer
Language English
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Snippet An amphiphilic biodegradable polymer, poly(aspartic acid‐co‐lactic acid) (PAL), was synthesized by simply heating a mixture of aspartic acid (Asp) and...
Abstract An amphiphilic biodegradable polymer, poly(aspartic acid‐ co ‐lactic acid) (PAL), was synthesized by simply heating a mixture of aspartic acid (Asp)...
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wiley
istex
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StartPage 34
SubjectTerms Aminoacid polymers
Applied sciences
biodegradable
copolymerization
drug delivery systems
Exact sciences and technology
Physicochemistry of polymers
renewable resources
Synthetic biopolymers
Title Synthesis and Characterization of Amphiphilic Biodegradable Copolymer, Poly(aspartic acid-co-lactic acid)
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