• 폴리머
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• 제38권2호
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• pp.138-143
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• 2014

${\alpha},{\omega}$-Hydroxypropyl기를 갖는 polydimethylsiloxane을 합성하고 이를 hexamethylenediisocyanate(HDI)의 고리화 반응으로 제조된 HDI trimer와 반응시켜 말단에 이소시아네이트 기를 갖는 PDMS 변성 urethane(PSU)을 제조하였다. 이소시아네이트기를 갖는 PSU와 2-hydroxyethylmethacrylate를 urethane 반응으로 acrylate기를 갖는 PDMS 변성 urethane base 수지(PSUA)를 제조하였으며, 이를 FTIR, NMR로 구조를 확인하여 분석하였다. 제조한 base 수지에 아크릴계 경화제, 광 개시제, 용매들을 혼합하여 코팅 액을 제조하였으며 이를 PET 필름에 도포하고 자외선으로 조사하여 고경도의 유연성을 갖는 코팅 막을 얻었다. 얻어진 코팅 막의 광 투과도는 89.7%, 연필경도는 3H, 접촉각은 $88^{\circ}$였다.

• 통합자연과학논문집
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• 제6권1호
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• pp.1-7
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• 2013

Polyurethane resin containing isocyanate is marked by excellent tensile and mechanical strengths and this test aims to gauge its applicability as a medical high polymer. Tris [2-(acryloyloxy)ethyl]isocyanurate and hexamethylenediisocyanate were added to a basic mixing ratio of HEMA (2-hydroxyethyl methacrylate), MMA (methyl methacrylate), NVP (n-vinyl-2-pyrrolidone) and crosslink agent, EGDMA (ethylene glycol dimethacrylate) with increasing proportions and copolymerized respectively. Also, the basic physical properties of the polymerized high polymers including refraction rate, tensile strength, light transmission and water content were measured to confirm that they are appropriate as hydrogelcontact lenses. After measuring the physical properties of high performance polymers produced by adding tris [2-(acryloyloxy) ethyl]isocyanurate, it was found that the average tensile strengths of sample TRIS1 to TRIS10 were between 0.285 and 0.612 kgf, while the average values of refractive index were ranged from 1.441 to 1.449 with water content from 30.00 to 37.35%.The measurement of physical properties of the copolymers generated by adding hexamethylenediisocyanate showed that the average tensile strength of sample HEXA1 to HEXA10 ranged from 0.267 to 1.742 kgf, the refractive index ranged from 1.443 to 1.475 and water contents were in the range of 21.22 to 35.58%. In all combinations the transmission rates satisfied the transmittance of general hydrogel contact lenses. From theresults, it is possible to conclude that the produced copolymers can be used as contact lens materials with excellent tensile strength.

• Macromolecular Research
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• 제8권3호
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• pp.137-141
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• 2000

3,4-Di-(2'-hydroxyethoxy)-4-nitrostilbene (2) was prepared by the reaction of 2-iodoethanol with 3,4-dihydroxy-4-nitrostilbene (1). Diol 2 was condensed with 2,4-toluenediisocyanate ,3,3-dimethoxy-4,4'-biphenylenediisocyanate , and 1,6-hexamethylenediisocyanate to yield polyurethanes 3, 4, and 5 containing the NLO-chromophore. Polymers 3-5 were soluble in common organic solvents such as acetone and DMSO. The glass transition temperatures(T$\sub$g/) of the resulting polymers 3-5 were obseved around 100-114$^{\circ}C$. Electrooptic coefficients (r$\sub$33/) of the poled polymer films were in the range of 18-25 pm/V at 633 nm. Polymers 3-5 began to decompose around 250$^{\circ}C$ in TGA thermograms.

• Bulletin of the Korean Chemical Society
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• 제22권7호
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• pp.753-757
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• 2001

1-(2'2'3'-Tricyano-3-carbomethoxycyclopropyl)-34-di-(2'-hydroxyethoxy)benzene, (4) was prepared by the reaction of bromomalononitrile with methyl 3,4-di-(2'-hydroxyethoxy)benzylidenecyanoacetate (3). Diol 4 was condensed with tolylene-2,4-diisocyanate, 3,3'-dimethoxy-4,4'-biphenylenediisocyanate, and 1,6-hexamethylenediisocyanate to yield polyurethanes 5, 6, and 7 containing tricyanocyclopropane functionalities in the pendant group. The resulting polymers 5-7 were soluble in common organic solvents and the inherent viscosities were in the range of 0.25-0.30 dL/g. Polyurethanes 5-7 showed a thermal stability up to 300 $^{\circ}C$ in TGA thermograms. Solution-cast films showed Tg values in the range of 100-125 $^{\circ}C$ and piezoelectric coeffcients (d31) of the poled polymer films were 1.3-2.0 pC/N, which are acceptable for piezoelectric device applications.

• 폴리머
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• 제38권6호
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• pp.720-725
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• 2014

Hydride terminated polydimethylsiloxane과 allyl amine을 hydrosilylation 반응으로 aminopropylpoly-dimethylsiloxane을 합성하고, 이를 hexamethylenediisocyanate(HDI)의 고리화 반응으로 제조된 cyclic HDI trimer와 반응시켜 urea결합으로 결합된 polydimethylsiloxane 변성 urea을 제조하였다. Polydimethylsiloxane 변성 urea의 말단에 있는 isocyante기와 2-hydroxyethylmethacrylate를 반응시켜 말단에 multi acrylate기가 도입된 polydimethylsiloxane 변성 urea/acrylate(PUA)를 제조하였다. 제조한 화합물의 구조를 FTIR, $^1H$ NMR로 확인하였으며, PUA에 아크릴계 단량체, 광 개시제, 용매 등을 여러 가지 조성비로 혼합하여 코팅 액을 제조하였으며 이를 PET 필름에 도포하고 UV을 조사하여 고경도의 유연성을 갖는 코팅 막을 제조하였다. 제조한 코팅 막의 연필 경도는 3H, 접촉각은 $82^{\circ}$, bendability는 $7{\phi}$까지 scratch가 발생하지 않았다.

• 공업화학
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• 제18권4호
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• pp.386-390
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• 2007

본 연구에서는 분자량이 각각 530, 830, 1000, 1250 그리고 2000인 폴리카프로락톤디올(PCD) 및 분자량이 300과 900인 폴리카프로락톤트리올(PCT)과 헥사메틸렌디이소시아네이트(HMDI)를 이용하여 폴리우레탄 프리폴리머를 중합하였다. 이 프리폴리머들을 2단계 현탁 중합반응을 통하여 폴리우레탄 비드들을 제조하였다. 비드들의 입도는 입도분석기를 이용하여 분석 하였으며, 비드들의 입자직경은 $10{\sim}30{\mu}m$이었다. 중합된 폴리우레탄 비드들의 구조는 FT-IR 스펙트럼 분석으로 확인하였고, TGA를 이용하여 열적 특성을 분석하였다. $T_g$는 $-23{\sim}-53^{\circ}C$ 범위이고, PCD의 분자량이 증가할수록 폴리우레탄 비드의 $T_g$는 다소 감소하였다. 폴리우레탄의 비드의 응집방지를 위해 테트라에톡시실란(TEOS)로 코팅하여 폴리우레탄 비드/실리카 복합물을 제조하였다.