시멘트 혼화용 폴리머 합성과 그 응용에 관한 연구 -Poly[DMA-co-DAMA] 에멀젼을 이용한 시멘트 모르타르의 방수성-

The Study on Synthesis and Application of Polymer Dispersion for Cement Modifier -The Waterproffing Effeet of Cement Mortar by Poly[DMA-co-DAMA] Emulsion-

친유성기와 친수성기를 함유한 긴 탄화수소 화합물인 dodecylmetacrylate와 2-diethylaminoethyl methacrylate로부터 DMA-co-DAMA를 합성하고 물에 쉽게 유화시키기 위해 양이온화 하여 아세트화 아크릴 공중합체를 합성하였다. 합성된 공중합체와 아세트화 공중합체의 구조를 IR, NMR 등으로 확인하고 GPC로부터 분자량을 산출하였으며 C. H. N분석도 하였다. 아세트화 아크릴 공중합체는 물에 완전히 유화가 가능하였고 물에 대한 유화 안정성이 증진되었다. 위에서 합성한 아세트화 아크릴공중합체에 Sodium Silicate Sodium gluconate, Oleic acid, Triethanolamine을 브렌딩하여 제조된 혼화용 폴리머 분산제(PDCM-PDD)를 제조하였다. 이것을 가지고 용융시험한 결과 45배 희석시 강도비 1.02, 흡수비 0.36~0.57, 투수비는 수압 $100g/cm^2$에서 0.44, $3kg/cm^2$에서 0.55로 우수한 방수성을 확인하였다.

DMA-co-DAMA were synthesized from 2-diethylaminoethyl metacrylate and dodecyl-metacrylate containing long chain hydrocarbon group with hydrophilic and hydrophobic radicals. To facilitate water emulsification,acrylic copolymer was cationized by acetic acid to produce acetated acrylic copolymer. The structures of the synthesized copolymer and acetated copolymers were confirmed by IR, NMR, and molecular weight was measured by GPC, and C. H. N elemental analysis. Acetated acrylic copolymers were perfectly emulsified in water and showed increased emulsion stability. Polymer dispersion for cement modifier(PDCM-PDD) was prepared by blending of the guaternized acrylic copolymer synthesized above sodium silicate sodium gluconate oleic acid and triethanol amine. The result with prepared polymer dispersion of cement modfier was examined, and it was found that excellent waterproffing effect; Water permeability ratio is 0.44 under the water pressure of $100g/cm^2$ and 0.55 under $3kg/cm^2$, and water absorption ratio is 0.36~0.47 and 1.02 compressive strength ratio at mixed ratio of water/PDCM-PDD is 45 times.