Synthesis of Monomeric Materials

Halpern, B. D.; Karo, Wolf; Laskin, L.; Levine, P.J.; Zomlefer, Jack

doi:10.21236/ad0062111

Search citation statements

Order By: Relevance

Paper Sections

Select...

Copolymerization Curve1

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1956

1958

Publication Types

Select...

Article2

Other1

Book1

Relationship

Self Cite0

Independent4

Authors

Journals

Cited by 4 publications

(1 citation statement)

References 26 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5 The critical concentration point, (fl)c, at which monomer feed and copolymer have identical composition, was not apparent from experimental data. However setting F =f in Equation 1. gives an expression for the critical concentration.…”

Section: Copolymerization Curvementioning

confidence: 99%

Polymers and Copolymers of N-1,1-Dihydrofluoroalkyl Acrylamides

Knobloch¹

1956

View full text Add to dashboard Cite

Section: Copolymerization Curvementioning

confidence: 99%

Polymers and Copolymers of N-1,1-Dihydrofluoroalkyl Acrylamides

Knobloch¹

1956

View full text Add to dashboard Cite

Polymers and copolymers of N‐1,1‐dihydroperfluoroalkyl acrylamides

Knobloch

1957

J. Polym. Sci.

View full text Add to dashboard Cite

A series of six new fluorinated acrylamide monomers has been studied. These included the N‐1,1‐dihydrotrifluoroethyl acrylamide, the N‐1,1‐dihydroheptafluorobutyl acrylamide and the N‐methyl, ‐ethyl, ‐n‐butyl and ‐isobutyl derivatives of the latter. Homopolymerization of the fluoroacrylamide monomers with benzoyl peroxide readily proceeded both in bulk and solution. Both liquid and crystalline fluorinated acrylamide monomers polymerized in emulsion with persulfate initiators. All homopolymers were thermoplastics which could be cast to yield clear transparent films. Specific evaluation was made of the electrical properties of polymeric N‐n‐butyl‐N‐1,1‐dihydroperfluorobutyl acrylamide before and after exposure to gamma radiation. A time—conversion polymerization curve was determined for the N‐ethyl‐N‐1,1‐dihydroperfluorobutyl acrylamide. The rapid polymerization found for this monomer characterizes the behavior of all the fluorinated acrylamide monomers. Copolymerization proceeded with a number of comonomers which included alkyl acrylates, fluoroalkyl acrylates, vinyl ethers, and several dienes. Reactivity ratios were evaluated for the copolymerization of N‐ethyl‐N‐1,1‐dihydroperfluorobutyl acrylamide (N‐EFBAm) with methyl methacrylate (MMA). Values determined were r1 = 0.89 (N‐EFBAm) and r2 = 0.77 (MMA). The fractionations of two copolymers are discussed in relation to compositional and structural variations present in the copolymers. Indication that these copolymers were essentially linear was provided by a determination of the Huggins empirical slope constants.

show abstract