Molecular weight distribution and branched structure of biodegradable aliphatic polyesters determined by s.e.c.-MALLS

Molecular weight distribution and mean square radius as a function of molecular weight for biodegradable aliphatic polyesters have been measured by multiangle laser light scattering (MALLS) detector for size exclusion chromatography (s.e.c.). The difference of their molecular structures is discussed...

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Bibliographic Details
Published in:Polymer (Guilford) 1996-03, Vol.37 (7), p.1281-1284
Main Authors: Yoshikawa, Katsuyuki, Ofuji, Naoki, Imaizumi, Mitsuhiro, Moteki, Yoshihiro, Fujimaki, Takashi
Format: Article
Language:English
Subjects:
aliphatic polyester
Applied sciences
Exact sciences and technology
long chain branching
Organic polymers
Physicochemistry of polymers
Properties and characterization
s.e.c.-MALLS
Solution and gel properties
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Summary:Molecular weight distribution and mean square radius as a function of molecular weight for biodegradable aliphatic polyesters have been measured by multiangle laser light scattering (MALLS) detector for size exclusion chromatography (s.e.c.). The difference of their molecular structures is discussed in relation to the melt elasticity, which contributes to processability for extrusion coating and extrusion foaming. The evaluated values of branching ratio indicate the existence of long chain branched structures.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(96)80855-X