Nucleating efficiency and thermal stability of industrial non-purified lignins and ultrafine talc in poly(lactic acid) (PLA)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F17%3A63516628" target="_blank" >RIV/70883521:28610/17:63516628 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0141391017301994" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0141391017301994</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2017.07.009" target="_blank" >10.1016/j.polymdegradstab.2017.07.009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nucleating efficiency and thermal stability of industrial non-purified lignins and ultrafine talc in poly(lactic acid) (PLA)

Popis výsledku v původním jazyce

Poly(lactic acid) (PLA) with D – lactide content of 1.2 wt% has been modified by melt mixing with 3 wt% of lignin (Kraft or Organosolv). Gel permeation chromatography and thermogravimetric analysis were employed to determine the thermal stability of PLA and nucleated PLA compounds during melt blending. The nucleating efficiency of industrial lignins was compared with the nucleation efficiency of ultrafine talc (UT). The feasibility of using industrial lignins and UT as nucleating agents for PLA was investigated by polarized light optical microscopy and differential scanning calorimetry, through non-isothermal and isothermal crystallization, whereas their structure was studied through in-situ synchrotron X-ray diffraction at wide and small angles. Both lignins, as well as UT induced heterogeneous nucleation and their nucleating action in PLA increased the crystallization rate and shortened the overall crystallization half time for isothermal crystallization. All tested nucleating agents increased the degree of crystallinity of PLA. The nucleation efficiency of Kraft and Organosolv lignin and ultrafine talc was 31%, 27%, and 80%, respectively. It was found that the thermal processing window of PLA was not influenced by the addition of lignins or ultrafine talc.

Název v anglickém jazyce

Nucleating efficiency and thermal stability of industrial non-purified lignins and ultrafine talc in poly(lactic acid) (PLA)

Popis výsledku anglicky

Poly(lactic acid) (PLA) with D – lactide content of 1.2 wt% has been modified by melt mixing with 3 wt% of lignin (Kraft or Organosolv). Gel permeation chromatography and thermogravimetric analysis were employed to determine the thermal stability of PLA and nucleated PLA compounds during melt blending. The nucleating efficiency of industrial lignins was compared with the nucleation efficiency of ultrafine talc (UT). The feasibility of using industrial lignins and UT as nucleating agents for PLA was investigated by polarized light optical microscopy and differential scanning calorimetry, through non-isothermal and isothermal crystallization, whereas their structure was studied through in-situ synchrotron X-ray diffraction at wide and small angles. Both lignins, as well as UT induced heterogeneous nucleation and their nucleating action in PLA increased the crystallization rate and shortened the overall crystallization half time for isothermal crystallization. All tested nucleating agents increased the degree of crystallinity of PLA. The nucleation efficiency of Kraft and Organosolv lignin and ultrafine talc was 31%, 27%, and 80%, respectively. It was found that the thermal processing window of PLA was not influenced by the addition of lignins or ultrafine talc.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/LO1504" target="_blank" >LO1504: Centrum polymerních systémů plus</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Polymer Degradation and Stability

ISSN

0141-3910

e-ISSN

—

Svazek periodika

142

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

244-254

Kód UT WoS článku

000408183300026

EID výsledku v databázi Scopus

2-s2.0-85024363091