The effect of polycarbodiimide chain extender on thermal stability and mechanical properties of biobased poly(lactic acid)/natural rubber blown films

Autor:	Kornchanok Akaradechakul, Peerapong Chanthot, Noppadon Kerddonfag, Cattaleeya Pattamaprom
Rok vydání:	2022
Předmět:	Polymers and Plastics Materials Chemistry Surfaces Coatings and Films
Zdroj:	Journal of Plastic Film & Sheeting. 38:396-415
ISSN:	1530-8014 8756-0879
DOI:	10.1177/87560879211058679
Popis:	This is the first study investigating how polycarbodiimide (PCDI) delays thermal degradation of poly(lactic acid)/natural rubber blends (PLA/NR) during the preparation of PLA/NR masterbatches (MB) and PLA/MB compounds for the film blowing process. The PCDI concentration used in this work was from 0 to 1 wt%. The torque plastograms, FTIR, and 1H-NMR spectra indicated the successful chain extending reaction between the PCDI carbodiimide group and the PLA carboxyl group, and there was no reaction with NR domains. The reaction increased the PLA/MB compounds’ viscosity and improved processability and mechanical properties of PLA/MB blown films. The optimal PCDI content for the highest melt strength, film blowing stability, and mechanical properties was at 0.25 wt% PCDI. Undesirable gel spots were observed in the PLA/MB blown film at PCDI concentrations higher than 0.5 wt%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cbc475c1c2fefb48de072191a5ac3a40 https://doi.org/10.1177/87560879211058679 Zobrazit plný text záznamu