Polymeric Microspheres’ World Lab of Fine Polymer Institute of Polymer Sci. & Eng. Tsinghua Univ., Beijing, China Welcome to the

2 Different size, different morphology, different structure, different composition, different functional groups ….., more particularly, different properties and different applications! This is the world of polymeric microspheres! We can design them. Moreover, we can control and synthesize them in the Lab of Fine Polymer ! Here you can find photos of several kinds of polymeric particles prepared in our Lab. How to prepare them? What are their applications? What are their forming mechanisms? We are fascinated in this world. If you are also interested in them and seeking for more information, please feel free to contact us.

3 Main monomers: St, MMA; BA, EA, MA, EHMA,VAc, D4, TDI… Functional Monomers: AA, MAA, HEMA, NaSS, amido-containing monomers, MATS, GMA, AGE… Crosslinker: DVB, EGDMA, Vi-D4… Surfactant/disperser: cationic, anionic, nonionic ….. Initiator/catalyst: water-soluble type, oil-soluble type Synthetic routes: Emulsion polymerization (conversional, soap-free, variable processes) Dispersion polymerization Microemulsion polymerization Miniemulsion polymerization Phase inversion emulsification (alkyd, epoxy, PU, polyether, polyester)

4 1. Submicrosized Polymeric Particles with uniform structure

5 300nm with core-shell morphology

6 300nm with different size and different functional groups

7 600nm

8 800nm

9 600nm

10 with mulberry-like morphology

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14 2. Nano-sized Polymeric Particles with uniform structure with micro phase separation structure

15 with strawberry-like morphology with core/shell morphology

16 with mulberry-like morphology

17 3. Micro-sized Polymeric Particles

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22 4. Submicrosized Polymeric Particles with Nano-porous Morphologies

23 300nm 300nm

24 800nm 800nm

25 800nm

26 400nm 800nm

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28 600nm

29 300nm 200nm 300nm

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31 600nm 5. Microsized Polymeric Particles with large porous Morphologies

32 – 600nm