| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Polymeric-based Materials: Potentials and Challenges
|
| Presentation Title |
Molecular Engineering and Additive Manufacturing of Polyisobutylene-Based Elastomers and Composites |
| Author(s) |
Naifu Shen, Jinyu Bu, Weinan Xu |
| On-Site Speaker (Planned) |
Naifu Shen |
| Abstract Scope |
Additive manufacturing or 3D printing of elastomers with extrusion-based methods such as fused filament fabrication (FFF) and direct ink writing (DIW) remains challenging due to the difficulty in balancing the rheological, mechanical, and thermal properties of the printing inks or filaments. Our recent work will be presented on the molecular engineering and extrusion-based 3D printing of polyisobutylene (PIB) elastomers and their hybrid materials. PIB-based thermoplastic elastomers (TPEs) such as poly(styrene-b-isobutylene-b-styrene) (SIBS) copolymers and PIB-based polyurethanes have been successfully used for FFF 3D printing. The microphase-separated structure of TPEs can be precisely tuned by adjusting the hard to soft block ratio or blending with rigid homopolymers. Butyl rubber and its nanocomposites have been successfully 3D printed with solvent-assisted DIW method by adjusting the rheological, mechanical, and electrical properties with nanoclay and graphene. Soft and stretchable strain sensors based on the 3D printed structures were also demonstrated |