Characterization of Commercial Aliphatic Hyperbranched Polyesters

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F06%3A00004532" target="_blank" >RIV/00216275:25310/06:00004532 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Characterization of Commercial Aliphatic Hyperbranched Polyesters

Original language description

Commercially available Boltorn Hx (x=20, 30) hyperbranched (HB) polyesters of different theoretical core/monomer ratio (1/12 for H20 and 1/28 for H30) were characterized with respect to molar mass, composition, and structure. The results were compared tothose obtained for the Boltorn H40 with a core/monomer ratio of 1/60 [Žagar E, Žigon M. Macromolecules 2002;35:9913 [11]]. The main side reaction in the pseudo one-pot synthesis of Boltorn polymers is a self-condensation of bis-MPA leading to the formation of HB structures without a core molecule. These are actually branches containing an unreacted carboxyl group. The fraction of HB structures without a core molecule increases with decreasing core/monomer ratio due to the decreasing fraction of HB structures with a core molecule. Since HB structures without a core molecule are of lower molar masses than HB structures with a core molecule, they particularly decrease the number average molar masses of the samples compared to the theoreti

Czech name

Charakterizace komerčních hypervětvených alifatických polyesterů

Czech description

Stupeň rozvětvení alifatickcý hypervětvených polyesterů byl studován gelovou permeačních chromatografií kombinovamou s víceúhlovým rozptylem světla. Stupeň větverní je úměrný rozdílům mezi gyračním a hydrodynamickým poloměrem makromolekul.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CB - Analytical chemistry, separation

OECD FORD branch

—

Project

—

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2006

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Polymer

ISSN

0032-3861

e-ISSN

—

Volume of the periodical

—

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

166-175

UT code for WoS article

—

EID of the result in the Scopus database

—