Torsional braid as a kinetic tool for the study of the polymerization of viscous materials. I. Initial studies

Adicoff, Arnold; Yukelson, Arnold A.

doi:10.1002/app.1966.070100112

J of Applied Polymer Sci

1966

DOI: 10.1002/app.1966.070100112

|View full text |Cite

Torsional braid as a kinetic tool for the study of the polymerization of viscous materials. I. Initial studies

Arnold Adicoff¹,

Arnold A. Yukelson²

Abstract: SynopsisThe torsional braid experiment of Lewis and Gillham has been so modified that kinetic parameters can be obtained in polymerizations conducted with viscous prepolymers. The relative rigidity curve is interpreted in terms of extent of cure. The activation energy for the polymerization of a carboxyl-terminated polybutadiene with an aziridinyl compound has been measured.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1968

1988

Publication Types

Select...

Article5

Relationship

Self Cite0

Independent5

Authors

Journals

Cited by 11 publications

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Torsional braid as a kinetic tool for the study of the polymerization of viscous materials. II. Catalytic effects in the polymerization of carboxylic acid‐terminated polybutadiene prepolymers with tris[1‐(2‐methyl)aziridinyl]phosphine oxide

Adicoff

Yukelson

1968

J of Applied Polymer Sci

View full text Add to dashboard Cite

synopsisThe torsional braid technique for studying the polymerization of viscous substances has been extended to a study of the homogenous catalytic behavior of a number of acidic and basic catalysts in the polymerization of carboxy-terminated polybutadiene with tris(methy1 aziridiny1)phasphine oxide. No general cat,alytic behavior was observed. Specific catalysis was observed in the case of lithium oleate, where the gel time was decreased, and in the case of bis(tri-wbutyltin) oxide, where the gel time was increased. The average energy of activation for all of these polymerizations was 13.9 f 0.5 kcal./mole. This energy of activation and the reaction environment, when compared with the data in the literature, strongly suggest that the explanation that a change in the rate-determining step occurs as a function of the polarity of the reaction medium fails to account for all of the results.

show abstract

Torsional braid as a kinetic tool for the study of the polymerization of viscous materials. II. Catalytic effects in the polymerization of carboxylic acid‐terminated polybutadiene prepolymers with tris[1‐(2‐methyl)aziridinyl]phosphine oxide

Adicoff

Yukelson

1968

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

Viscoelastic properties of elastic polyurethaneureas in the curing process

Raszczuk

Kozakiewicz

Orzechowski

1986

J of Applied Polymer Sci

View full text Add to dashboard Cite

synopsisDynamic viscoelastic properties of a system, NCO-terminated polyurethane-aniline-cresolformaldehyde liquid resin were studied during the curing process using an R-17 Weissenberg Rheogoniometer. For gel time determinations a new method was developed, the gel time being then defined as the cure time when the relaxation time 7 = 3 s at a frequency of 0.1 Hz was achieved. The dynamic storage modulus G', the dynamic viscosity q' and the relaxation time T have been determined as functions of curing time. The effects of cure temperature and of curing agent concentration on G', q', and T were studied. The influence of cure temperature on the gel time and on the visco-elastic properties determined at 18 ks (5 h) of curing was discussed. Based on the experimental results, it was concluded that curing at higher temperature led to the more crosslinked polymer. Activation energy values for the gel time were also determined and compared with the values for polyurethanes and polyurethaneureas reported elsewhere. A relationship between the relaxation time and the effect of frequency on modulus G' was presented, and it appeared to be independent of cure temperature, curing agent concentration, and curing time, being then presumably a useful method for comparative studies of viscoelastic behavior of different materials in curing process. This relationship was compared with the approximate relationship between tan 6 and d In G ' l d In o given by Staverman and Schwarzl. The agreement at shorter relaxation times and some discrepancy at longer times were obtained.

show abstract

The dermal toxicity of isoamyl‐2‐cyanoacrylate

Arthaud

Lewellen

Akers

1972

J. Biomed. Mater. Res.

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Torsional braid as a kinetic tool for the study of the polymerization of viscous materials. I. Initial studies

Cited by 11 publications

References 4 publications

Torsional braid as a kinetic tool for the study of the polymerization of viscous materials. II. Catalytic effects in the polymerization of carboxylic acid‐terminated polybutadiene prepolymers with tris[1‐(2‐methyl)aziridinyl]phosphine oxide

Torsional braid as a kinetic tool for the study of the polymerization of viscous materials. II. Catalytic effects in the polymerization of carboxylic acid‐terminated polybutadiene prepolymers with tris[1‐(2‐methyl)aziridinyl]phosphine oxide

Viscoelastic properties of elastic polyurethaneureas in the curing process

The dermal toxicity of isoamyl‐2‐cyanoacrylate

Contact Info

Product

Resources

About