《Activated Isobutylene-Isoprene Rubber-Synthesis, Peroxide Cure, and Mechanical Properties》 was written by Sun, Yu; Fan, Chengkai; Wei, Benqian; Wesdemiotis, Chrys; Jia, Li. Name: Ethyl propiolate And the article was included in ACS Applied Polymer Materials in 2020. The article conveys some information:
EIIR, a derivative of isobutylene-isoprene rubber (IIR) with geminal vinylidene-acrylate motifs, has been synthesized by grafting Et propiolate to IIR via EtAlCl2-catalyzed Alder-ene reaction. Methods to cure EIIR using dicumyl peroxide (DCP) with m-phenylene-N,N’-bismaleimide (BMI) as the coagent have been successfully developed. The strength, extensibility, and overall toughness of the peroxide-cured EIIR significantly exceed those of previously reported peroxide-cured IIR derivatives The role of the germinal vinylidene-acrylate moiety in curing has been investigated via model reactions using small-mol. surrogates of the functionalities present in EIIR. Evidence from mass spectrometry suggests that the germinal vinylidene-acrylate moiety undergoes both radical addition and hydrogen abstraction. Its importance for the curing process is further demonstrated by the ability of its small-mol. surrogate, Et 4,5-dimethyl-(E-2),5-hexdienoate (EDHEX), to reduce chain scission when used as a coagent in conjunction with BMI. The excellent mech. properties and the simplicity of the curing package make the peroxide-cured EIIR a strong candidate for pharmaceutical closure applications.Ethyl propiolate(cas: 623-47-2Name: Ethyl propiolate) was used in this study.
Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Name: Ethyl propiolate
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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics