Publication detail

Synthesis of Bio-Based Thermoset Mixture Composed of Methacrylated Rapeseed Oil and Methacrylated Methyl Lactate: One-Pot Synthesis Using Formed Methacrylic Acid as a Continual Reactant

JAŠEK, V. FUČÍK, J. MELČOVÁ, V. FIGALLA, S. MRAVCOVÁ, L. KROBOT, Š. PŘIKRYL, R.

Original Title

Synthesis of Bio-Based Thermoset Mixture Composed of Methacrylated Rapeseed Oil and Methacrylated Methyl Lactate: One-Pot Synthesis Using Formed Methacrylic Acid as a Continual Reactant

Type

journal article in Web of Science

Language

English

Original Abstract

Methacrylated vegetable oils are promising bio-based polymerizable precursors for potential material application in several fields, such as coating technologies or 3D printing. The reactants' availability for their production is an enormous advantage, but the modified oils also exhibit high apparent viscosity values and poor mechanical properties. This work focuses on a way to produce oil-based polymerizable material precursors in a mixture with a viscosity modifier in a one-batch process. The required methacrylic acid for the modification of epoxidized vegetable oils can be obtained as a secondary product of the methacrylation of methyl lactate forming a polymerizable monomer along with the acid. This reaction results in a yield of over 98% of methacrylic acid. Epoxidized vegetable oil can be added into the same batch using acid for oil modification which results in the one-pot mixture of both methacrylated oil and methyl lactate. The structural verifications of products were provided via FT-IR, H-1 NMR, and volumetric methods. This two-step reaction process produces a thermoset mixture with a lower apparent viscosity of 142.6 mPa center dot s in comparison with methacrylated oil exhibiting a value of 1790.2 mPa center dot s. Other physical-chemical properties of the resin mixture such as storage modulus (E ' = 1260 MPa), glass transition temperature (T-g = 50.0 degrees C), or polymerization activation energy (17.3 kJ/mol) are enhanced in comparison with the methacrylated vegetable oil. The synthesized one-pot mixture does not require additional methacrylic acid due to the use of the one formed in the first step of the reaction, while the eventual thermoset mixture exhibits enhanced material properties compared to the methacrylated vegetable oil itself. Precursors synthesized in this work may find their purpose in the field of coating technologies, since these applications require detailed viscosity modifications.

Keywords

methacrylated methyl lactate; viscosity modification; thermoset mixture; polymerizable precursors; resin; modified lactate

Authors

JAŠEK, V.; FUČÍK, J.; MELČOVÁ, V.; FIGALLA, S.; MRAVCOVÁ, L.; KROBOT, Š.; PŘIKRYL, R.

Released

7. 4. 2023

Publisher

MDPI

Location

Switzerland

ISBN

2073-4360

Periodical

Polymers

Year of study

15

Number

8

State

Swiss Confederation

Pages from

1

Pages to

21

Pages count

21

URL

https://www.mdpi.com/2073-4360/15/8/1811

Full text in the Digital Library

http://hdl.handle.net/11012/209499

BibTex

@article{BUT183508,
  author="Vojtěch {Jašek} and Jan {Fučík} and Veronika {Melčová} and Silvestr {Figalla} and Ludmila {Mravcová} and Štěpán {Krobot} and Radek {Přikryl}",
  title="Synthesis of Bio-Based Thermoset Mixture Composed of Methacrylated Rapeseed Oil and Methacrylated Methyl Lactate: One-Pot Synthesis Using Formed Methacrylic Acid as a Continual Reactant",
  journal="Polymers",
  year="2023",
  volume="15",
  number="8",
  pages="21",
  doi="10.3390/polym15081811",
  issn="2073-4360",
  url="https://www.mdpi.com/2073-4360/15/8/1811"
}