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Volumn 29, Issue 23, 1996, Pages 7356-7361

Enzymatic degradability of poly(lactide): Effects of chain stereochemistry and material crystallinity

Author keywords

[No Author keywords available]

Indexed keywords

AMORPHOUS FILMS; BIODEGRADATION; CATALYST ACTIVITY; COMPOSITION EFFECTS; COPOLYMERIZATION; CRYSTAL ORIENTATION; CRYSTALLIZATION; DIFFERENTIAL SCANNING CALORIMETRY; ENZYMES; MOLECULAR STRUCTURE;

EID: 0030569152     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma960513j     Document Type: Article
Times cited : (247)

References (60)
  • 21
    • 85033818018 scopus 로고    scopus 로고
    • Japanese Patent, Oct. 25, 1994, 06,298,236
    • Kawashisma, N.; Ajioka, M.; Suzuki, K. Japanese Patent, Oct. 25, 1994, 06,298,236.
    • Kawashisma, N.1    Ajioka, M.2    Suzuki, K.3
  • 22
    • 85033821334 scopus 로고    scopus 로고
    • Japanese Patent, Sept. 13, 1994, 06,256,480
    • Kimura, K.; Ito, T.; Aoyama, T. Japanese Patent, Sept. 13, 1994, 06,256,480.
    • Kimura, K.1    Ito, T.2    Aoyama, T.3
  • 48
    • 85033831582 scopus 로고    scopus 로고
    • Aldrich Catalogue of Fine Chemicals
    • Aldrich Catalogue of Fine Chemicals.
  • 49
    • 85033824176 scopus 로고    scopus 로고
    • (1991), U.S. Patent No. 5,053,485
    • Nieuwenhuis et al. (1991), U.S. Patent No. 5,053,485.
    • Nieuwenhuis1
  • 51
    • 85033806565 scopus 로고    scopus 로고
    • note
    • The annealing conditions were based on previous work performed in our laboratory (see ref 31 above) and from unpublished results that showed little change in the % crystallinity of PLA polymer films which were annealed at 75°C for time periods between 4 and 36 h.
  • 52
    • 85033830031 scopus 로고    scopus 로고
    • note
    • Film aging was carried out, since aged and deaged PLA samples degrade at different rates when exposed to proteinase K. Specifically, deaged PLA samples where there is a densification of the amorphous phase degrade at relatively slower rates than aged samples. See ref 41 above.
  • 54
    • 85033831670 scopus 로고    scopus 로고
    • note
    • Proteinase K had 13.8 units/mg of solid and 14.3 units/mg of protein (Biuret) based on values reported by the supplier. One unit will hydrolyze casein to produce color equivalent to 1 μmol (181 μg) of tyrosine/min at pH 7.5 and 37°C (color by Folin-Ciocalteu reagent).
  • 60
    • 85033812122 scopus 로고    scopus 로고
    • note
    • Linear regression analyses of film weight loss (to <60%) vs time plots were carried out to determine values of slopes shown in Figures 1-3. Correlation coefficients from these analyses are as follows: PLA-75 (0.98); PLA-75M (1.0); PLA-80 (0.99); PLA-80M (0.93); PLA-82 (0.96); PLA-82M (0.98); PLA-85 (0.97); PLA-85M (0.99); PLA-90 annealed (0.99); PLA-90M annealed (0.99); PLA-90 amorphous (0.96); PLA-90M amorphous (0.98); PLA-91M amorphous (0.99); PLA-92 annealed (0.93); PLA-92M annealed (0.99); PLA-92 amorphous (0.98); PLA-92M amorphous (0.99); PLA-94 annealed (0.94); PLA-94M annealed (0.99); PLA-94 amorphous (0.98); PLA-93M amorphous (0.98); PLA-95 annealed (01.0); PLA-95 amorphous (1.0).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.