JoVE Journal

Chemistry

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Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions

Poly(ethylene glycol) (PEG) brush-arm star polymers (BASPs) with narrow mass distributions and tunable nanoscopic sizes are synthesized in via ring opening metathesis polymerization (ROMP) of a PEG-norbornene macromonomer followed by transfer of portions of the resulting living brush initiator to vials containing varied amounts of a rigid, photo-cleavable bis-norbornene crosslinker.

Chapters in this video

0:05

Title

1:18

Preparation of Norbornene-PEG Macromonomer

2:11

Preparation of Catalyst A

3:03

Preparation of Stock Solution of Living Brush Polymer with DP=10

4:08

Formation of Brush-arm Star Polymers

5:08

Results: Characterization of Photodegradable Brush-arm Star Polymers by Gel Permeation Chromatography

6:09

Conclusion

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