Synthesis of polystyrene by dispersion polymerization in 1,1,1,2-tetrafluoroethane (R134a) using inexpensive hydrocarbon macromonomer stabilizers
Macromolecules, ISSN: 0024-9297, Vol: 36, Issue: 20, Page: 7534-7542
2003
- 25Citations
- 10Captures
Metric Options: Counts1 Year3 YearSelecting the 1-year or 3-year option will change the metrics count to percentiles, illustrating how an article or review compares to other articles or reviews within the selected time period in the same journal. Selecting the 1-year option compares the metrics against other articles/reviews that were also published in the same calendar year. Selecting the 3-year option compares the metrics against other articles/reviews that were also published in the same calendar year plus the two years prior.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
We describe here the use of inexpensive poly(vinyl acetate) (PVAc) macromonomer stabilizers for the free radical dispersion polymerization of styrene in 1,1,1,2-tetrafluoroethane (R134a). PVAc was identified from a wide range of polymers as being highly soluble in R134a at low pressures (<10 bar). The phase behavior of PVAc (M = 12 000-500 000 g/mol) in R134a was studied over a range of temperatures and pressures. It was found that PVAc exhibits LCST phase behavior in R134a. Based on the results of these solubility studies, PVAc macromonomer stabilizers were synthesized for use in dispersion polymerization. The dispersion polymerization of styrene in R134a gave rise to polystyrene microspheres (4-5 μm diameter) in good yields (up to 95%) with number-average molecular weights as high as 42 000 g/mol. The polystyrene microspheres could be redispersed in neat R134a after isolation and purification.
Bibliographic Details
Provide Feedback
Have ideas for a new metric? Would you like to see something else here?Let us know