Hydrophilic nanoporous polystyrenes and 1,2-polybutadienes

Fengxiao Guo, Katja Jankova Atanasova, Martin Etchells Vigild, Sokol Ndoni

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Nanoporous polymers from ordered block copolymers having hydrophilic cavity surfaces were successfully prepared by two methodologies: ' 1. Nanoporous polystyrenes fromPtBA-b-PS diblock or PDMS-b-PtBA-b-PS triblock copolymer precursors by atom transfer radical polymerization (ATRP), or combination of living anionic polymerization~ and ATRP r~spectively. The one, PtBA block, can be modified to the hydrophilic PAA, where the dther, polydimethysiloxane (PDMS) block, can be fully degraded. Deprotection of the tert-butyl groups in PtBA and the selective etching of PDMS· chains were accomplished by applying HF or TFA in one step. Thus both the di- and triblock copolymers after such a treatment resulted. in nanoporous polystyrenes with hexagonal cavities of different nanosizes (6-11 nm, Figure 1). 2. Nanoporous I,2-polybutadienes (I,2-PB) by grafting various acrylic monomers onto the pore. surfaces via surface-initiated ATRP. The nanoporous 1,2-PB precursor with gyroid morphology was prepared from the diblock copolymer 1,2-PB-b-PDMS after cross-linking the major 1,2-PB .. block, and etching the minor PDMS block. Then a bromoester i~itiator for ATRP was immobilized onto the pore walls using different pathways for the conversion of the double bonds of 1,2-PB to bromoisobutyrate by using one to three steps chemical modification. Grafting polyacrylate layers of PPEGMA, PHEMA etc. onto themon
Original languageEnglish
Title of host publicationNPD Nordic Polymer Days 2008
Number of pages49
Publication date2008
Publication statusPublished - 2008
EventNordic Polymer Days 2008 - Stockholm, Sweden
Duration: 11 Jun 200813 Jun 2008

Conference

ConferenceNordic Polymer Days 2008
CountrySweden
CityStockholm
Period11/06/200813/06/2008

Cite this

Guo, F., Jankova Atanasova, K., Vigild, M. E., & Ndoni, S. (2008). Hydrophilic nanoporous polystyrenes and 1,2-polybutadienes. In NPD Nordic Polymer Days 2008