Role of functionality in MDI‐based elastomer preparation

摘要

AbstractIn our study of functionality, a control 4,4′‐diphenylmethane diisocyanate (MDI)‐based elastomer prepared from a linear polyester and a linear chain extender was compared to (1) those having functionality synthesized into the backbone of the polyester and (2) those having the functionality added as part of the chain extender package. A wide range of physical and mechanical properties of the finished elastomers were compared. The resultant information offers a strong basic understanding of the role of functionality in an MDI‐based polyester elastomer and also provides the complex chemical relationships involved in formulating a desired elastomer. This information will better enable the urethane researcher and manufacturer to pick and choose those attributes of elastomeric functionality that are necessary to fulfill their needs. © 1994 John WileyS