Tack and Viscoelasticity of Block Copolymer Based Adhesives

Autor:	K. W. Rollmann, G. Kraus, R. A. Gray
Rok vydání:	1979
Předmět:	chemistry.chemical_classification Materials science Surfaces and Interfaces General Chemistry Polymer Tackifier Viscoelasticity Surfaces Coatings and Films Dwell time chemistry Creep Mechanics of Materials Phase (matter) Materials Chemistry Copolymer Adhesive Composite material
Zdroj:	The Journal of Adhesion. 10:221-236
ISSN:	1545-5823 0021-8464
DOI:	10.1080/00218467908544626
Popis:	Tackification of block copolymers of the linear ABA or radial (AB) x type, in which the center block (B) is in the rubbery state at use temperature, follows principles established for other rubbery polymers except for peculiarities of the systems introduced by the block polymer domain structure. Successful pressure-sensitive adhesives result wherever the tackifer is compatible with the rubbery phase, which forms the continuum. Connectivity of the hard phase generally leads to loss in compliance, making tack ultimately contact-limited; whereas tack is low, adhesion can be developed by control of dwell time, temperature and contact pressure. A previously explored criterion for contact limitation, defining a critical minimum 1-second creep compliance, appears to be valid for block polymer-based adhesives, as is the rule that an effective tackifier must raise Tg (in the present case of the rubbery continuum) while also acting as a plasticizer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ae074cc54164392fbf673e1058aa1279 https://doi.org/10.1080/00218467908544626 Zobrazit plný text záznamu