This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Jones, D.W. Articles by Johnston, D.E. Search for Related Content PubMed PubMed Citation Articles by Jones, D.W. Articles by Johnston, D.E. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB BUTYL GLYCOLYL BUTYL PHTHALATE DIBUTYL PHTHALATE ETHANOL Social Bookmarking                         What's this?

Influence of Plasticizer on Soft Polymer Gelation

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

E.J. Sutow

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

B.S. Graham

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

E.L. Milne

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

D.E. Johnston

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

An evaluation has been made of the soft polymer gel systems of the type used as prosthodontic short-term denture-lining materials. The purpose of the study was to determine the effect upon gel strength and gelation time produced by variations in the composition of the plasticizer liquids. Poly(ethylmethacrylate) co-polymers were mixed with combinations of ethyl alcohol and the esters dibutyl phthalate (DBP), butylphthalyl butylglycolate (BPBG), and benzyl salicylate (BS).

The relative rate of gelation of plasticizer polymer compositions was obtained by means of a reciprocating rheometer. The gelation rate was found to increase rapidly with an increase in the ethyl alcohol content. Significantly shorter gelation times were also found with liquids containing the lower-molecular-weight esters. A linear relationship was found between the ethyl alcohol content and the log of the gelation time.

The higher-molecular-weight esters produced the strongest gel. A linear relationship was found between the gelation (log) times and the seven-day puncture strength. The ratio of polymer to plasticizer liquid was found to have a very significant influence upon the puncture strength and gelation time. Molecular weight or molecular volume of the ester plasticizers was found to have a greater influence on gel formation than the cohesive energy parameter. The strong polar bonding of ethyl alcohol was found to have a significant influence on both the rate of gel formation and the subsequent gel strength. The data indicate that controlled variations in the characteristics of plasticity and gel strength of dental soft polymer systems can be made to suit different clinical prosthodontic requirements.

Journal of Dental Research, Vol. 65, No. 5, 634-642 (1986)
DOI: 10.1177/00220345860650050101


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				B.B. Harsanyi, W.C. Foong, R.E. Howell, P. Hidi, and D.W. Jones Hamster Cheek-pouch Testing of Dental Soft Polymers Journal of Dental Research, June 1, 1991; 70(6): 991 - 996. [Abstract] [PDF]

				B.S. Graham, D.W. Jones, and E.J. Sutow An in vivo and in vitro Study of the Loss of Plasticizer from Soft Polymer-gel Materials Journal of Dental Research, May 1, 1991; 70(5): 870 - 873. [Abstract] [PDF]

				D.W. Jones, G.C. Hall, E.J. Sutow, M.F. Langman, and K.N. Robertson Chemical and Molecular Weight Analyses of Prosthodontic Soft Polymers Journal of Dental Research, May 1, 1991; 70(5): 874 - 879. [Abstract] [PDF]