Ophelia Chim

4 Questions 2 Answers 0 Followers

Questions related from Ophelia Chim

What cause hysteresis on polymer network?? creep、tan delta、energy dissipation?

I am currently investigating what factors have a hysteresis effect on th polymer network. I suspect this can be explained by creep testing. By applying force to the material for different times...

14 April 2023 845 1 View

G‘’is lower than G' before polymerization, but become larger after Uv light is on. Why is that?

My sample include small liquid crystal, monomer and photoinitiator. the mixture is a little viscous at room temperature. The sample was tested by rheometer. The resulr was G' was higher than G''...

02 March 2023 4,644 3 View

How to measure the gel fraction?

I’d like to determine the monomer conversion through gel fraction. The experimental process I read in some papers was described in a simple way, omitting some details. I wonder how to filter the...

13 February 2023 4,498 4 View

Why i couldn't gain crosslinked networks with high concentration of raft agents?

the weight ratio of acrylate monomer : RAFT agent : Photoinitiator Irgacure 819 is 8 : 0.2 : 0.2. I could get crosslinked networks if the concentration of Raft agent below 0.2 I read some papers...

23 December 2022 6,006 2 View