A REVIEW OF NARMCO 5208 REISN MATRIX

This paper reviews the characteristics of Narmco 5208 resin matrix.Emphasis is given to the formula of the resin system,mechanism of cure reaction,kinetics of cure reaction and processing characteristics of Narmco 5208.The formulation of 5208 consists of mainly MY-720 (TGDDM) as epoxy resrn,EPORAL (DPS) as curing agent and EpiRea SU-8 (polyglyuidyl ether of bisphenol A novalac ream) as minor epoxy component.The principal cure reactions are the primary amine-epoxide,the secondary amine-epoxide,hydroxyl-epoxide and epoxide-epoxide.The kinetics analysis of 5208 shows that the lemtion order,n,is substantially affected by heating rate.n is equal to 2 at slow scan rate but is reduced to 1.5 at higher scan rate.The activation energy,E,is not affeced by the sean rate,and the average value of E is 25.6±1.8keal/mole.Enviromental effeces during a process cure cycle and resin advattcemenC effects of 5208 are evaluated.some suggedtions are proposed for developing TGDDM-DDS resin matrices in China.