단량체 laurylacrylate(LA), 가교성단량체 ethyleneglycoldimethacrylate(EGDMA) 및 개시제 benzoylperoxide(BPO) 등을 이용하여 현탁중합을 통해 poly(laurylacrylate)(PLA) 중합체를 합성하였다. 얻어진 PLA 중합체는 25-65 ℃의 온도범위에서 7종의 기름에 대하여 흡유능력을 측정하여 대부분 60분이내에 포화흡유능력을 보였으며, LA 99.867 wt%와 EGDMA 0.133 wt%로 이루어졌을 때 가장 높은 흡유능력을 보였다. 또한 흡유능력은 온도증가에 따라 증가하였으며, 기름종류에도 더욱 의존하여 chloroform>>toluene>o-xylene>THF>decane>octane>hexane순으로 감소하였다. 팽윤평형에 관한 열역학적 해석을 위하여 Wilson 모델을 도입하여 팽윤모델을 구성하였다. 팽윤모델은 혼합(Δμmix)과 탄성변형(Δμel)에 관한 두 종류의 화학포텐셜로 구성되었다. 추산된 팽윤모델의 상호작용에너지(λ12-λ11)는 온도증가에 따라 감소하였고, 열역학적으로 기름(1)과 중합체(2) 성분간 Wilson parameter(Λ12)는 증가하는 것으로 나타났다.

The poly(laurylacrylate), PLA, polymers were prepared by an emulsion polymerization method. The laurylacrylate, LA, were used as the starting materials and ethyleneglycol dimethacrylate, EGDMA, as the crosslinker and benzoylperoxide as the initiator. The prepared PLA polymer was used to measure the oil-absorption capacity under various conditions and absorbed fastly each oil for seven types of oils within 60 min at temperature range 25 ℃ to 65 ℃. The maximum oil-absorption capacity of PLA formed shown at the condition of LA 99.867 wt% and EGDMA 0.133 wt%. The oil-absorption capacities increased with the increase of oil temperature and largely depended on the oil types. The decreasing order of oil-absorption capacity with the increase of temperature was the order of chloroform>>toluene>o-xylene>THF>decane>octane>hexane. We_x000D_ introduced Wilson model to construct the thermodynamic model on swelling equilibria. The model consists of two kinds of chemical potentials which they are mixing chemical potential(Δμmix) and elastic deformation chemical potential(Δμel). The λ12-λ11, which is the interaction energy between the molecules designated in the subscripts, decreased with the increase of oil-absorption temperature. It can be seen that the decrease of interaction energy brings about the increase of Wilson parameter(Λ12) between oil(1) and polymer(2) component.

Poly(Laurylacrylate) Oil-absorption Capacity Chemical Potential Swelling Equilibria Interaction Energy

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