High Tg Polymeric Materials for Heated Microfluidic Systems
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
In this thesis work a novel material platform for microfluidics applications has been developed using dual-cure ternary monomer thiol-ene-epoxy system. The introduction of epoxy component to the OSTE (off-stoichiometric thiol-ene) system has significantly increased the glass transition temperature and mechanical properties of the material compared with regular thiolenes, enabling the applications with a temperature resistant requirement (such as Polymerase Chain Reaction, PCR) and offering opportunities of ease of fabrication of multilayer devices, facile surface modification and biocompatible bonding to biosensors (such as biofunctionalized Quartz crystal microbalance, QCM). The majority of the work in this thesis has been devoted to the formulation of the novel ternary monomer system and the different curing procedures. Different options of epoxy monomers were appraised and UV/thermal and thermal/UV two-stage curing procedures with different perspectives were evaluated with respect to the dynamic mechanical property, biocompatibility and bondability. Formulations of ternary thiol-ene-epoxy system with different off-stoichiometric ratios were designed and characterized by DMTA in order to investigate the relation between the off-stoichiometric ratios and Tg and mechanical properties. Raman spectra were used to assess the conversion after each curing step. The novel thiol-ene-epoxy (hereafter named OSTE(+)) system was compared with the OSTE system, and the advantages and disadvantages of the newly developed system were summarized.
Place, publisher, year, edition, pages
2011. , 67 p.
IdentifiersURN: urn:nbn:se:ltu:diva-55971Local ID: cc4934b4-028c-4f02-a04c-7e4055c22652OAI: oai:DiVA.org:ltu-55971DiVA: diva2:1029357
Subject / course
Student thesis, at least 30 credits
Materials Engineering, master's level
Validerat; 20111210 (anonymous)2016-10-042016-10-04Bibliographically approved