Formal Kinetic Analysis of two-step Curing Reactions in Melts-Simulation of the Reaction Behaviour
Thermo-controlled two-step curing reactions in melt are of particular interest for reactive polymeric systems. These reaction types are e. g. observed in thermal curing PUR powder coatings. Illustrated by the uretdione/OH-reaction we describe the formal kinetic analysis of two step curing processes in melts. The two reaction steps (allophanate-and uretdione reaction) can be separated applying special reaction conditions. The curing reaction of polymeric model systems was monitored by non-isothermal DSC measurements with different heating rates. On the basis of these data the kinetic parameters (activation energies, pre-exponential factors and reaction orders) were determined with the aid of formal kinetic analysis. In combination with rheological investigations we analyzed the kinetic behaviour of polymeric model systems. These investigations were of particular interest in view of the simulation of curing processes of low temperature powder coatings. In this way time consuming curing experiments can be minim zed.
formal kinetic analysis DSC rheology curing reactions powder coatings
EDELMANN M. GEDAN-SMOLKA M. HEINRICH G. LEHMANN D.
Leibniz Institute of Polymer Research Dresden, Hohe Straβe 6, D-01069 Dresden, Germany
国际会议
上海
英文
15-18
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）