Related Experiment Video
Updated: May 21, 2026
11:49
Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
Published on: March 8, 2019
Poly-100: One-Pot Toughening of Polylactide with Soybean-Derived Reactive Elastomers
Baker W Kuehl1, Vivek Garg1, Austin Hohmann1
1Department of Chemical & Biological Engineering, Iowa State University, Ames, Iowa 50011, United States.
Biomacromolecules
|May 19, 2026
Summary
This study presents a sustainable method to toughen brittle Poly(lactic acid) (PLA) using soybean oil-derived elastomers. The novel process enhances PLA
Area of Science:
- Polymer Science and Engineering
- Sustainable Materials Development
Background:
- Poly(lactic acid) (PLA) is a widely used biobased thermoplastic.
- Its inherent brittleness restricts its application range.
Purpose of the Study:
- To develop a scalable, solvent-free method for toughening PLA.
- To improve the mechanical properties of PLA using biobased elastomers.
Main Methods:
- A one-pot Poly-100 route combining elastomer synthesis and reactive extrusion.
- RAFT polymerization of soybean-oil-derived elastomers directly in epoxidized soybean oil.
- Incorporation of poly(methacrylated epoxidized high-oleic soybean oil) (PMAEHOSO) into PLA.
Main Results:
- PMAEHOSO improved PLA compatibility, leading to finer dispersions.
- Enhanced interfacial adhesion via in situ grafting of residual epoxide groups.
- Increased elongation at break from 3% to 30% at 20 wt% PMAEHOSO loading.
Conclusions:
- The developed method offers a scalable pathway for producing toughened PLA.
- Biobased elastomers can significantly enhance PLA's mechanical performance.
- Reaction media design can align polymer properties with sustainability objectives.
Related Concept Videos
01:20Types of Step-Growth Polymers: Polyesters
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
01:03Step-Growth Polymerization: Overview
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
01:13Olefin Metathesis Polymerization: Overview
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
02:35Free-Radical Chain Reaction and Polymerization of Alkenes
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
01:20Anionic Chain-Growth Polymerization: Overview
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...