Page 58 - Biodegradable Polyesters
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36 2 Functional (Bio)degradable Polyesters by Radical Ring-Opening Polymerization
O O OCH 3
O
n m
O
O
+ Br −
N
C 2 H 5
(b)
(a)
Figure 2.2 Compostability of a polycaprol- inal sample and (b) 2 weeks after buried in
actone-based ionomer poly(MDO-co-MMA- compost. (Reprinted with permission from
co-DMAEMA⋅BrC H ) containing 40 mol% of Ref. [51]. Copyright {2009} American Chemi-
2 5
MDO and 12 mol% of ionic groups: (a) orig- cal Society.)
EG
M = 9500 g mol −1
p
e. 160 h PBS
= 6500 g mol −1
M p
d. 160 h lipase
c. 48 h KOH
b. 24 h KOH
a. Original M = 56 000 g mol −1
p
5 10 15 20 25 30
Retention volume (mL)
Figure 2.3 Enzymatic (10 mg⋅ml −1 by decreased molar mass using gel
lipase (from Pseudomonas cepacia)) and permeation chromatography (GPC).
basic (KOH) hydrolysis of poly(PEG-b- (Reprinted with permission from Ref.
(BMDO-co-DMAEMA)) (molar ratio of [52]. Copyright {2012} American Chemical
BMDO : DMAEMA = 16 : 84) as proved Society.)
