03/24/2022
By Sokny Long
The Francis College of Engineering, Department of Plastics Engineering, invites you to attend a doctoral dissertation defense by Weiqing Xia on “Dual-cure epoxy resins enabling functionally graded adhesives.”
Ph.D. Candidate: Weiqing Xia
Defense Date: Tuesday, March 29, 2022
Time: 11 a.m. to 1 p.m.
Location: This will be a virtual defense via Zoom. Those interested in attending should contact weiqing_xia@student.uml.edu and committee advisor (ADVISOR’s Email) at least 24 hours prior to the defense to request access to the meeting.
Committee Chair (Advisor): Scott Stapleton, Associate Professor, Department of Mechanical Engineering, Umass Lowell
Committee Members:
- Daniel Schmidt, Group leader, Sustainable polymer group, LIST
- WanTing Chen, Assistant Professor, Department of Plastics Engineering, UMass Lowell
- Ramaswamy Nagarajan, Professor, Department of Plastics Engineering, UMass Lowell
Brief Abstract:
A thermally cured epoxy / anhydride system is shown to exhibit dose-dependent increases in crosslink density, glass transition temperature and modulus. The addition of various sensitizers further boosts sensitivity towards radiation-induced cross-linking. A theory proposed by Shibayama relating Tg with crosslink density provides a useful means to predict the dose at which a particular set of properties may be produced. This combination of a new approach to materials formulation and processing and the identification of simple analytical models to predict resultant properties provides a useful new strategy for the generation of functionally graded materials (FGAs).
All interested students and faculty members are invited to attend the online defense via remote access.