[논문]Preparation and Properties of Waterborne-Polyurethane Coating Materials Containing Conductive Polyaniline

Kim, Han-Do; Kwon, Ji-Yun; Kim, Eun-Young

doi:10.1007/bf03218404

Preparation and Properties of Waterborne-Polyurethane Coating Materials Containing Conductive Polyaniline 원문보기

Macromolecular research, v.12 no.3, 2004년, pp.303 - 310

Kim, Han-Do (Department of Textile Engineering, Pusan National University) , Kwon, Ji-Yun (Department of Textile Engineering, Pusan National University) , Kim, Eun-Young (Department of Textile Engineering, Pusan National University)

Abstract ▼ AI-Helper

We have prepared an aqueous dispersion of poly(aniline-dodecyl benzene sulfonic acid complex) (PANI-DC) that has an intrinsic viscosity (〔η〕) near 1.3 dL/g using aniline as a monomer, dodecyl benzene sulfonic acid(DBSA) as a dopant/emulsifier, and ammonium peroxodisulfate(APS) as an oxidant. We found that the electrical conductivity of a PANI-DC pellet was 0.7 S/cm. A waterborne-polyurethane (WBPU) dispersion, obtained from isophorone diisocyanate/polytetramethylene oxide glycol/dimethylol propionic acid/ethylene diamine/triethylene amine, was used as a matrix polymer. We prepared blend films of WBPU/PANI-DC with variable weight ratios (from 99/1 to 66/34) by solution blending/casting and investigated the effects that the PANI-DC content has on the mechanical and dynamic mechanical properties, hardness, electrical conductivity, and antistaticity of these films. The tensile strength, percentage of elongation, and hardness of WBPU/PANI-DC blend films all decreased markedly upon increasing the PANI-DC content. The antistatic half-life time ($\tau$$_<$TEX>$\frac{1}{2}$/) of pure WBPU film was about 110 s, but we found that those of WBPU/ultrasound-treated PANI-DC blend films decreased exponentially from 1.2 s to 0.1 s to almost 0 s upon increasing the PANI-DC content from 1 wt% to 15 wt% to > 15 wt%, respectively.

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제안 방법

FT infrared spectrum of PANI-DC powder was recorded in the range of 500 ~4000 cm1 using FTIR spectrometer (Impact 400D, Nicolet, Madison, WI) by the KBr disk method at a resolution of 4 cm" for 32 scans. Elemental analysis was carried out to determine the elements (C, H, N, S) of the PANI-DC powder using Ele-mental analyzer (Vario EL Ⅲ, Germany). The particle sizeof PANI-DC was determined using Particle Size Analyzer (Galai Production Ltd.
The effect of PANI-DC content on the mechanical property, dynamic mechanical property, hardness, electrical conductivity, and antistaticity of WBPU/PANI-DC blend films was investigated. The Tgs and Tgh of pure WBPU film were -58 and 8.

대상 데이터

Aniline monomer (Aldrich Chemical, Milwaukee, WI, USA) was distilled under reduced pressure prior to use. Dodecyl benzene sulfonic acid (DBSA, Sigma, Milwaukee, WI), ammonium peroxodisulfate (APS, Aldrich Chemical, Milwaukee, WI), dibutyl tin dilaurate (DBTDL, Aldrich Chemical, Milwaukee, WI) and methanol (Sigma, Milwaukee, WI) were used as received. Isophorone diisocyanate (IPDI, Aldrich Chemical, Milwaukee, WI), triethy- lamine (TEA, Sigma, Milwaukee, WI), ethylene diamine (EDA, Aldrich Chemical, Milwaukee, WI), methyl ethyl ketone (MEK, Sigma, Milwaukee, WI) and N-methyl-2- pyrrolidone (NMR Aldrich Chemical, Milwaukee, WI) were used after dehydration with 4 A molecular sieves for one day.
Dodecyl benzene sulfonic acid (DBSA, Sigma, Milwaukee, WI), ammonium peroxodisulfate (APS, Aldrich Chemical, Milwaukee, WI), dibutyl tin dilaurate (DBTDL, Aldrich Chemical, Milwaukee, WI) and methanol (Sigma, Milwaukee, WI) were used as received. Isophorone diisocyanate (IPDI, Aldrich Chemical, Milwaukee, WI), triethy- lamine (TEA, Sigma, Milwaukee, WI), ethylene diamine (EDA, Aldrich Chemical, Milwaukee, WI), methyl ethyl ketone (MEK, Sigma, Milwaukee, WI) and N-methyl-2- pyrrolidone (NMR Aldrich Chemical, Milwaukee, WI) were used after dehydration with 4 A molecular sieves for one day. Poly (tetramethylene oxide) glycol (PTMG, Mn = 2,000 g/ mol, Aldrich, Milwaukee, WI) was dried over calcium hydride at room temperature for 24 h.

이론/모형

The mechanical measurements were made in simple extension on dumbbell specimens using a tensile tester (Tinius Olsen 1000, USA) at a cross-head speed of 20 mm/minute according to ASTM D-412. Electrical conductivity of PANI-DC pellet and WBPU/BMSH-DC blend films were measured using a Surface Resistance Detector (CMT-SR1000N, CM Co. Ltd., Korea) and the usual four-probe method. The antistaticity of blend samples was measured using Static Honestometer (Shishido co.
Electrical Conductivity and Antistaticity. The electrical conductivity of WBPU/B\NI-DC blend films was examined using 4-probe techniques. The electrical conductivities of WBPU/PANI-DC blend films and PANI-DC pellet are shown in Table IL The electrical conductivity of PANI-DC pellet and WBPU film was 0.
2 (mm³) for DMTA measurement. The mechanical measurements were made in simple extension on dumbbell specimens using a tensile tester (Tinius Olsen 1000, USA) at a cross-head speed of 20 mm/minute according to ASTM D-412. Electrical conductivity of PANI-DC pellet and WBPU/BMSH-DC blend films were measured using a Surface Resistance Detector (CMT-SR1000N, CM Co.

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