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

Result code in 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>

Alternative codes found

RIV/16193296:_____/10:MJPOLY10

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

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

Original language description

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)

Czech name

—

Czech description

—

Type

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

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

—

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)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2010

Confidentiality

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

Name of the periodical

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

—

Volume of the periodical

116

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

6

Pages from-to

—

UT code for WoS article

—

EID of the result in the Scopus database

—