Synthesis And Characterization Of Bisphenol-f Epoxy Resin And Modified-acs Resin

I. Bisphenol-F monomer and bisphenol-F epoxy resin have been prepared in the part one of the paper. The kinetics of the cure reaction for a system of bisphenol-F epoxy resin with hardeners, such as 4,4?diarninodiplienyl methane, 4,4?diaminodiphenyl oxide and 4,4-diarninodiphenyl sulfone, are studied by differential scanning calorimetry (DSC). Autocatalytic behavior is shown in the first stages of the cure for the system, which could be well described by the model proposed by Kamal that includes two rate constants, k1 and k,, and two reaction orders, m and n. The curing reaction at the later stages is practically diffusion-controlled due to the onset of gelation and vitrification. To consider the diffusion effect more precisely, diffusion factor, 1(a), is introduced into Kamal抯 equation. Thus, the curing kinetics could be predicted well over the whole range of conversion covering both pre- and postvitrification stages. The glass transition ternperature(Tg) of the BPFER/hardeners system isothermally cured partially are determined by means of torsional braid analysis (TBA), and the results show that Tgs increased with conversion up to a constant value. The thermal degradation kinetics of cured BPFER are investigated by thermogravimetric analysis (TGA), revealing two decomposition steps. Interpenetrating polymer networks(IPNS) of BPFER and polyurethane is prepared, and the effect of component of JPNs on thermal property is discussed. 2. The copolymers, Poly(acrylonitrile-styrene-methyl methacrylate) (PASM) and poly(acrylonitrile-styrene) (PAS), are synthesized from AN, St and MIvIA by emulsion polymerization. The glass transition temperature, thermostability and rheological behavior are investigated by differential scanning calorimetiy(DSC), thermogravimetric analysis(TGA) and Shimadzu koka flow tester, respectively. The results show that the introduction of appropriate amount of methyl methacrylate does little harm to PASM as a material. ACSM is obtained from CPE and PASM by blending method. The rheological behavior of ACSM is conducted by a I Shirnadzu koka flow tester. The compatibility of PASM with chlorinated polyethylene (CPE) is estimated by the methods of torsional braid analysis (TBA) and scanning electron microscopy (SEM). The results show that MMA has a compatible effect on the blend of the CPE with the copolyrner PAS. The impact strength increases with the increasing of CPE, while the tensile strength decreases with the increasing of CPE.