Effects of thermal treatment and nucleating agents on crystallinity, toughness, and stiffness of PLA/PCL blends
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00550856" target="_blank" >RIV/61389013:_____/22:00550856 - isvavai.cz</a>
Result on the web
<a href="http://www.expresspolymlett.com/issue.php?y=2022&n=3" target="_blank" >http://www.expresspolymlett.com/issue.php?y=2022&n=3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3144/expresspolymlett.2022.18" target="_blank" >10.3144/expresspolymlett.2022.18</a>
Alternative languages
Result language
angličtina
Original language name
Effects of thermal treatment and nucleating agents on crystallinity, toughness, and stiffness of PLA/PCL blends
Original language description
The effects of the thermal treatment and nucleating agents on the morphology, crystallinity, and mechanical properties of poly(lactic acid)/poly(ε-caprolactone) (PLA/PCL) blends were studied in order to obtain PLA/PCL blends with both high stiffness and toughness. The standard thermal treatment of the melt-mixed blends (a compression molding without annealing) resulted in the systems with optimized morphology (at PLA/PCL ratio 80/20) and very high toughness (ca 16×higher with respect to neat PLA), but the stiffness at elevated temperatures (above Tg of PLA at 65 °C) was low due to the low crystallinity of the PLA matrix (<10%). The compression molding with annealing at 110 °C could increase the crystallinity of PLA (up to ~40%), but the toughness decreased steeply due to morphological changes (a coalescence of PCL particles associated with the structure coarsening). The lowering of the annealing temperature (to 80 °C) and addition of the PLA nucleating agent (1 wt% of talc) led to the blends showing both high toughness (9× with respect to neat PLA) and crystallinity (~35%). Dynamic mechanical analysis evidenced that the higher PLA crystallinity improved the storage modulus at temperatures >60 °C by ca two orders of magnitude. The achieved combination of the PLA/PCL toughness and stiffness was one of the highest, according to the available literature.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10404 - Polymer science
Result continuities
Project
<a href="/en/project/NU21-06-00084" target="_blank" >NU21-06-00084: Influence of UHMWPE type of polyethylene on the lifetime of knee replacements and relationship with the implant surfaces design</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Express Polymer Letters
ISSN
1788-618X
e-ISSN
1788-618X
Volume of the periodical
16
Issue of the periodical within the volume
3
Country of publishing house
HU - HUNGARY
Number of pages
13
Pages from-to
221-233
UT code for WoS article
000752462200002
EID of the result in the Scopus database
2-s2.0-85125891967