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Synthesis and Performance of Epoxy-Terminated Hyperbranched Polymers Based on Epoxidized Soybean Oil
Guang-Zhao Li1, Qiuhong Wang1, Chongyu Zhu2
1Key Laboratory of Materials and Surface Technology (Ministry of Education), School of Materials Science and Engineering, Xihua University, Chengdu 610039, China.
Molecules (Basel, Switzerland)
|February 13, 2025
Summary
Epoxy-terminated hyperbranched polymers (EHBPs) derived from epoxidized soybean oil offer tunable properties. Increased epoxy content enhances adhesion and water resistance while reducing viscosity, ideal for coatings and adhesives.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Engineering
Background:
- Epoxy-terminated hyperbranched polymers (EHBPs) are versatile macromolecules with desirable properties like low viscosity and high functionality.
- Epoxidized soybean oil (ESO) serves as a sustainable precursor for developing novel polymeric materials.
Purpose of the Study:
- To synthesize and characterize novel epoxy-terminated hyperbranched polymers (EHBPs) using epoxidized soybean oil.
- To investigate the structure-property relationships of EHBPs concerning their epoxy content, molecular weight, and performance characteristics.
Main Methods:
- Synthesis of epoxy soybean oil polyol (EGD) via ring-opening and esterification reactions.
- Incorporation of epichlorohydrin (ECH) to create EHBPs with varying mass ratios.
- Characterization using FT-IR, GPC, 1H NMR, 13C NMR, and epoxy value determination.
- Evaluation of water contact angle, adhesion, rheological, and thermal properties.
Main Results:
- The synthesized EGD exhibited a degree of branching of 0.45.
- EHBPs displayed epoxy values ranging from 0.73 to 0.89 mol/100g.
- Higher epoxy values correlated with increased water contact angle, adhesion strength, and glass transition temperature.
- Viscosity decreased as epoxy value and molecular weight increased.
Conclusions:
- The study successfully produced EHBPs with tunable properties from a bio-based source.
- The developed EHBPs demonstrate potential for surface coating modification and adhesive formulation due to their low viscosity and high adhesion.
- The findings highlight the significant impact of epoxy content on the performance attributes of hyperbranched polymers.
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