Hyperbranched polyacetals with tunable degradation rates

Macromolecules

Volumn 44, Issue 12, 2011, Pages 4658-4664

  Chatterjee, Saptarshi ^a   Ramakrishnan, S ^a  

^a INDIAN INSTITUTE OF SCIENCE   (India)

Author keywords

[No Author keywords available]

Indexed keywords

ACETAL RESINS; DEGRADATION; MONOMERS; POLYMER BLENDS; SCAFFOLDS; TOPOLOGY;

HIGH VOLUME FRACTION; HYDROPHOBIC NATURE; HYPER-BRANCHED STRUCTURES; HYPERBRANCHED POLYMERS; POLYMER DEGRADATION; POLYMER FORMATION; POLYMERIZATION PROCESS; SELF-CONDENSATION;

DENDRIMERS;

EID: 79959437102     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma2004663     Document Type: Article

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70. 2O) was added to it. The NMR spectrum of the supernatant solution was directly monitored as a function of time, and the intensities of peaks due to the aldehyde and butanol were independently monitored; the rates of hydrolysis under these conditions were very slow and did not correspond to the bulk degradation studies done earlier under agitation. These preliminary studies do not confirm the selective hydrolysis of the peripheral dialkylacetal groups, as peaks due to the aldehyde and the alkanol appear to be growing very slowly but at similar rates. Thus, while the presence of an induction period, which varies with the hydrophobicity of the peripheral groups, not in question, further studies are required to unravel the exact mechanism for this behavior. For details refer to Figure S8.