Enhancement Of Molecular Weight Of L-Lactic Acid Polycondensates Under Vacuum In Solid State

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F12%3A43868024" target="_blank" >RIV/70883521:28110/12:43868024 - isvavai.cz</a>

Alternative codes found

RIV/70883521:28610/12:43868024

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Enhancement Of Molecular Weight Of L-Lactic Acid Polycondensates Under Vacuum In Solid State

Original language description

Enhancement of L-lactic acid polycondensates by involving of postpolycondensation reactions in solid state under vacuum and catalyzed by stannous 2-ethylhexanoate were studied in the presented work. The catalyst was used only in postpolycondensation step. An effect of the catalyst concentration and postpolycondensation reaction time on resulting properties of poly(lactic acid) was studied by gel permeation chromatography. Fourier transform infrared spectroscopy and differential scanning calorimetry. Results show significant enhancement of molecular weight in case of the systems containing 2 wt. % of the catalyst due to the postpolycondensation procedure (M-W similar to 91.0 kg/mol; i.e. 1655 % after 24 hours). However, further progress can be assumed with increasing reaction time. This enhancement of poly(lactic acid) molecular weight had a response corresponding to changes of both physico-chemical and thermal properties of the solid state postpolycondensation products.

Czech name

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Czech description

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Type

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

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2012

Confidentiality

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

Name of the periodical

Materiali in Tehnologije

ISSN

1580-2949

e-ISSN

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Volume of the periodical

46

Issue of the periodical within the volume

1

Country of publishing house

SI - SLOVENIA

Number of pages

5

Pages from-to

37-41

UT code for WoS article

000300600100007

EID of the result in the Scopus database

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