Claims
- 1. A method for making a polymer comprising the step of:
synthesizing a polymer by employing a chain transfer agent having the formula (II) 28where X and Y are independently selected from oxygen, sulfur, and fully-substituted nitrogen where R1 and R2 are independently selected from hydrogen, halogen, or an organic group, with the proviso that at least one of R1 or R2 be hydrogen or halogen, R3 is an organic group, R4 and R5 are independently selected organic groups.
- 2. A method for making a polymer, as set forth in claim 1, wherein the method includes combining said chain transfer agent with a monomer solution and subsequently initiating polymerization of said monomer solution.
- 3. A method for making a polymer, as set forth in claim 1, wherein the method includes scheduling the addition of said chain transfer agent throughout said step of synthesizing a polymer.
- 4. A method for making a polymer, as set forth in claim 1, wherein X is oxygen.
- 5. A method for making a polymer, as set forth in claim 1, wherein Y is oxygen.
- 6. A method for making a polymer, as set forth in claim 1, wherein R1 is selected from the group including hydrogen, chlorine, fluorine, vinyl groups and substituted vinyl groups.
- 7. A method for making a polymer, as set forth in claim 1, wherein said organic groups are selected from the group including phenyl, ester, nitrile, ketone, amide, and vinyl groups.
- 8. A method for making a polymer, as set forth in claim 1, wherein the chain transfer agent is defined according to formula (III)
- 9. A method for making a polymer, as set forth in claim 1, wherein the chain transfer agent is defined according to formula (IV)
- 10. A method for making a polymer, as set forth in claim 1, wherein the chain transfer agent is defined according to formula (V)
- 11. A method for making a polymer, as set forth in claim 1, wherein the chain transfer agent is a macrofer and is defined according to the formula (VI)
- 12. A method for making a polymer, as set forth in claim 1, wherein the chain transfer agent is a macrofer and is defined according to the formula (VIII)
- 13. A method for making a polymer, as set forth in claim 1, wherein the chain transfer agent is a macrofer and is defined according to the formula (VIII)
- 14. A method for making a polymer, as set forth in claim 1, wherein the chain transfer agent is a macrofer and is defined according to the formula (IX)
- 15. A method for making a polymer, as set forth in claim 1, wherein said chain transfer agent is selected from the group including 1-phenylvinyl diphenylphosphinate, 1-methylvinyl diphenylphosinate, 1-phenylvinyl methyl phenylphosphonate, 1-phenylvinyl dimethylphosphate, 1-phenylvinyl-2, 2-dimethylpropylphosphate.
- 16. A method for making a polymer comprising the step of:
synthesizing a polymer by employing a chain transfer agent having the formula (I) 36where Y is selected from oxygen, sulfur, and fully-substituted nitrogen, X is selected from oxygen, sulfur, and fully-substituted nitrogen, R1, R2 and R3 are independently selected from moieties that will allow the β carbon to have a high reactivity with a free radical, and R4 and R5 are independently selected moieties.
- 17. A polymerization process comprising the steps of:
initiating a free radical polymerization; and effecting chain transfer with a reagent selected from the group including vinyl esters of a phosphorus containing acid, vinyl thioesters of a phosphorus acid, vinyl amides of a phosphorus acid, vinyl esters of a thiophosphorus acid, vinyl thio esters of a thiophosphorus acid, and vinyl amides of a thiophosphorus acid.
- 18. A method of controlling the molecular weight of polymers resulting from a free radical polymerization including the step of:
carrying out a free radical polymerization in the presence of a chain transfer agent having the formula (II) 37where X and Y are independently selected from oxygen, sulfur, and fully-substituted nitrogen where R1 and R2 are independently selected from hydrogen, halogen, or an organic group, with the proviso that at least one of R1 or R2 be hydrogen or halogen, R3 is an organic group, R4 and R5 are independently selected organic groups.
- 19. A chain transfer agent having the formula (II)
Parent Case Info
[0001] This application claims the benefit of pending U.S. Provisional Patent Application No. 60/103,532, filed on Oct. 8, 1998.
Government Interests
[0002] This invention was made with government support under a grant awarded by The National Science Foundation. The government may have certain rights to the invention.
Provisional Applications (1)
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Number |
Date |
Country |
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60103532 |
Oct 1998 |
US |