The effects of chain-extending cross-linkers on the mechanical and thermal properties of poly(Butylene adipate terephthalate)/poly(lactic acid) blown films

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F21%3A63539038" target="_blank" >RIV/70883521:28610/21:63539038 - isvavai.cz</a>

Alternative codes found

RIV/70883521:28110/21:63539038

Result on the web

<a href="https://www.mdpi.com/2073-4360/13/18/3092" target="_blank" >https://www.mdpi.com/2073-4360/13/18/3092</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym13183092" target="_blank" >10.3390/polym13183092</a>

Result language

angličtina

Original language name

The effects of chain-extending cross-linkers on the mechanical and thermal properties of poly(Butylene adipate terephthalate)/poly(lactic acid) blown films

Original language description

This study investigates the effects of four multifunctional chain-extending cross-linkers (CECL) on the processability, mechanical performance, and structure of polybutylene adipate tereph-thalate (PBAT) and polylactic acid (PLA) blends produced using film blowing technology. The newly developed reference compound (M·VERA® B5029) and the CECL modified blends are characterized with respect to the initial properties and the corresponding properties after aging at 50◦ C for 1 and 2 months. The tensile strength, seal strength, and melt volume rate (MVR) are markedly changed after thermal aging, whereas the storage modulus, elongation at the break, and tear resistance remain constant. The degradation of the polymer chains and crosslinking with increased and decreased MVR, respectively, is examined thoroughly with differential scanning calorimetry (DSC), with the results indicating that the CECL-modified blends do not generally endure thermo-oxidation over time. Further, DSC measurements of 25 µm and 100 µm films reveal that film blowing pronouncedly changes the structures of the compounds. These findings are also confirmed by dynamic mechanical analysis, with the conclusion that tris(2,4-di-tert-butylphenyl)phosphite barely affects the glass transition temperature, while with the other changes in CECL are seen. Cross-linking is found for aromatic polycarbodiimide and poly(4,4-dicyclohexylmethanecarbodiimide) CECL after melt-ing of granules and films, although overall the most synergetic effect of the CECL is shown by 1,3-phenylenebisoxazoline.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

—

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2021

Confidentiality

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

Name of the periodical

Polymers

ISSN

2073-4360

e-ISSN

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Volume of the periodical

13

Issue of the periodical within the volume

18

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

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UT code for WoS article

000700153300001

EID of the result in the Scopus database

2-s2.0-85115121684