Optimization reaction conditions and characterization of L-Lactic acid direct polycondensation products catalyzed by non-metal based compound

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F10%3A63509404" target="_blank" >RIV/70883521:28110/10:63509404 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/16193296:_____/10:MJPOLY10

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Optimization reaction conditions and characterization of L-Lactic acid direct polycondensation products catalyzed by non-metal based compound

Popis výsledku v původním jazyce

In this article, we deal with the investigation into a poly(lactic acid) (PLA) preparation process catalyzed by a non-metal based compound. Low-molecular-weight PLA was synthesized by the direct melt polycondensation of L-lactic acid catalyzed by methanesulfonic acid (MSA). This study was focused on the investigation into optimal MSA concentration determinativ and into the temperature (130, 145, 160, 175, and 190_C) and time (6, 12, 18, and 24 h) influence on the structure (Fourier transform infrared spectroscopy), molecular weight (viscometric measurements and gel permeation chromatography), and thermal properties (differential scanning calorimetry) of the samples. The results show an optimal MSA content of 0.5 wt %. The highest molecular weight of PLA prepared by this method was reached after 18 h of reaction at 175_C (weight-average molar mass 1/4 17.2 _ 103 g/mol)

Název v anglickém jazyce

Optimization reaction conditions and characterization of L-Lactic acid direct polycondensation products catalyzed by non-metal based compound

Popis výsledku anglicky

In this article, we deal with the investigation into a poly(lactic acid) (PLA) preparation process catalyzed by a non-metal based compound. Low-molecular-weight PLA was synthesized by the direct melt polycondensation of L-lactic acid catalyzed by methanesulfonic acid (MSA). This study was focused on the investigation into optimal MSA concentration determinativ and into the temperature (130, 145, 160, 175, and 190_C) and time (6, 12, 18, and 24 h) influence on the structure (Fourier transform infrared spectroscopy), molecular weight (viscometric measurements and gel permeation chromatography), and thermal properties (differential scanning calorimetry) of the samples. The results show an optimal MSA content of 0.5 wt %. The highest molecular weight of PLA prepared by this method was reached after 18 h of reaction at 175_C (weight-average molar mass 1/4 17.2 _ 103 g/mol)

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

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Svazek periodika

116

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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