| Summary: | 碩士 === 國立臺北科技大學 === 化學工程所 === 94 === In this research we use biheterofnctional epoxy resin（e.x.D.E.R.331，A2） and multifunctional gentisamides（e.x.diethylene triamine，DETA，B5） to produce hyperbranched polymer to explore monomer feed composition，monomer functionality number、functionality unequal reactivites（substituent effect）、single functional group capper（e.x.PGE，phenyl glycidy ether，AR）etc. individually in which way they effect hyperbranched polymer、polymerization and molecularweight distributiion.Aaccording to the result, we can design related fabricate monomer components and reaction condition to modulate and control hyperbranched polymer. Otherwise, we can authenticate and analyze the structure of molecules.
In the primary research, we have found that after adding single functional group diluents PGE（AR）up to a certain volume in double functional group epoxy resin(D.E.R.331)/ diethylene triamine（DETA）five functional group（A2/B5）system, the reaction system can’t act on gelatoin but come into sol. It is the rationale that PGE with only single epoxy group （A）competing against double functional group（A2） combine with polyamines（B） in the meanwhile of polymerization’s progress. Therefore, they would form suspended chain in the ends of molecules, and act on gelation due to forming effective networks in vain. Theoretically, the discovery of this experiment should extendedly apply it to produce hyperbranched polymer,which we regard AR as end-capping, and add PGE to avoid forming three dimensions net structure during polymerization.
According to different proportion, We mix A2+B5+AR, and heat them to carry polymerization out. Then, we can draw the samples in several stages to analyze. To use DSC measure the curve from the mentioned mixture of A2+B5+AR under the raising and unchanged temperature during releasing heat, and the chrematistics of Tg. In the other hand, we select suitable dissolvent to melt the mentioned compound to act on polymerization. We can draw the samples in several stages to analyze with FTIR to measure the conversion ratio of epoxy group. Otherwise, we can gauge the change of molecularweight with GPC during polymerization’s progress.
In this study, hyperbranched polymers were prepared by a bulk polymerization of diepoxides(A2), multi-function amine monomers (Bƒ), and monoepoxide (AR). First, the dependence of the structure parameters, such as molecular weight, and polydispersity, of the hyperbranched polymers on the ratio of A2/Bf/AR were discussed. By adding the monoepoxides, the number average molecular weight of the polymers of 3500~27000 with PDI of 2.3~5.3 can be obtained. The molecular weight of the polymers decreases with increasing of the monoepoxide (AR). The glass transition temperature of the hyperbranched polymers measured by a DSC decreased with the lower molecular weight. The hyperbranched polymers with multi-functional vinyl groups were synthesized by the addition of glycerol monomethacrylate.
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