Quaternary ammonium salt terminated silane was prepared from aminopropyldimethylethoxysilane with methyliodide and ionized 7,7,8,8- tetracyanoquinodimethane (Li+TCNQ-) was prepared from TCNQ with methyliodide and lithium iodide. Quaternary ammonium salt silane-TCNQ adduct (ST) was prepared by reacting quaternary ammonium salt terminated silane with Li+TCNQ- solution. Poly(dimethylsiloxane)-ST adduct (PST) was prepared by condensation of α,ω-hydroxyl group terminated poly(dimethylsiloxane) (PDMS) with ST. Maleated polyethylene modified with PDMS (PST-g-MPE) was prepared by melt polymerization of maleated PE and PST in internal mixer and PST-g-MPE/carbon black (CB) and MPE/CB composites were prepared by compounding PST with MPE and PST-g-MPE, respectively. The thermal and mechanical properties of the composites were measured and dispersion characteristics of CB in matrix resins show that the dispersion of CB in PST-g-MPE/CB was better than that of MPE/CB composite.

3-Aminopropyldimethylethoxysilane(AS)과 methyliodide를 이용하여 4차 암모늄 실란을 제조하고 7,7,8,8-tetracyanoquinodimethane(TCNQ)과 methyliodide 및 요오드화 리튬을 이용하여 Li+TCNQ-를 제조하였다. 제조한 4차 암모늄 실란에 Li+TCNQ-를 가하여 4차 암모늄 실란-TCNQ adduct(ST)를 제조하고 이를 말단에 OH기를 갖는 poly(dimethylsiloxane)(PDMS)과 축합반응시켜 poly(dimethylsiloxane)-ST adduct(PST)를 제조하였다. PST 변성 말레화 폴리에틸렌(PST-g-MPE)은 말레화 폴리에틸렌과 PST를 internal mixer(Rheomix 600P)를 사용하여 용융중합으로 제조하였으며 여기에 카본블랙(CB)의 함량을 변화시켜 PST-g-MPE/CB 및 MPE/CB 복합체를 제조하였다. 제조한 복합체의 열적 특성을 측정한 결과 유사한 열분해 온도를 나타내었다. PST-g-MPE/CB 복합체의 인장강도는 카본블랙의 함량 증가에 따라 200∼308 MPa로 증가하였으며 모폴로지를 측정한 결과 MPE/CB 복합체보다 PST-g-MPE/CB 복합체의 경우에서 카본블랙의 분산이 보다 더 잘 이루어졌음을 확인하였다.

Keywords: quaternary ammonium salt silane; maleated polyethylene; 7,7,8,8-tetracyanoquinodimethane; carbon black