氨基衍生物对水性聚氨酯的改性研究
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摘要
以聚碳酸酯二元醇PCD；聚已内酯多元醇PCL；二羟基甲基丙酸DMPA为主要原料合成水性聚氨酯预聚体,为双组份中的A组分。再以三氮唑与异氰酸酯(异佛尔酮二异氰酸酯IPDI或异氰酸丙基三乙氧基硅烷IPTS)的反应产物作为B组分,将A、B组分合适配料比共混,经各项性能表征,发现改性后的水性聚氨酯性能要优于末改性的水性聚氨酯。
以聚碳酸酯二元醇PCD；聚已内酯多元醇PCL；苯基恶唑啉、二羟基甲基丙酸DMPA、异佛尔酮二异氰酸酯IPDI为主要原料合成水性聚氨酯,苯基恶唑啉的含量分别占水性聚氨酯总量的0.5%、1.0%、1.5%、2.0%、2.5%,涂膜后进行TG、X-RD、DSC、红外等表征,及耐水性和力学性能的测试,发现含苯基恶唑啉2.5%的水性聚氨酯性能最好,耐水性得到很大的提高。但随着苯基恶唑啉含量的进一步增大,聚氨酯的稳定性逐渐降低,故2.5%为最佳配方。
以六亚甲基二异氰酸酯(HDI)、三羟甲基丙烷(TMP)为原料合成了一种新型的低游离多异氰酸酯基团的TMP低聚体。再以此低聚体、聚己内酯多元醇(PCL-2000)、聚碳酸酯多元醇(PCD-1000)、二羟甲基丙酸(DMPA)、异佛尔酮二异氰酸酯(IPDI)为主要原料合成了WPU。经过红外、耐水性和力学性能的测试表征,改性后的水性聚氨酯综合性能得到提高。
Water-borne polyurethane prepolymer-A compound-was prepared with PC、PCL、DMPA as major materials, B compound was prepared with triazole and IPD1/IPTS. A compound and B compound were mixed with proper ratio and improvements of properties of modified water-borne polyurethane were found through various tests. Water-borne polyurethane was prepared with PCD、PCL、IPDI、DMPA and different ratios(0.5%、1.0％、1.5%、2.0%、2.5%) of phenyl-oxazole. TG、XRD、DSC、IR、water-resistance and mechanical properties of different modified systems were tested and it was found that water-borne polyurethane containing 2.5% phenyl-oxazole performed best among the above modified systems. However, along with the further increase content of phenyl-oxazole,polyurethane stability reduced gradually, for the best formula is to 2.5%.
An oligomer containing low free isocyanate group was prepared with HDI and TMP, and was used as a major component in the preparation of water-borne polyurethane together with PCL、PCD、DMPA and IPDI. Better over-all performance of modified water-borne polyurethane was observed through IR、water-resistance and mechanical properties.
以聚碳酸酯二元醇PCD；聚已内酯多元醇PCL；苯基恶唑啉、二羟基甲基丙酸DMPA、异佛尔酮二异氰酸酯IPDI为主要原料合成水性聚氨酯,苯基恶唑啉的含量分别占水性聚氨酯总量的0.5%、1.0%、1.5%、2.0%、2.5%,涂膜后进行TG、X-RD、DSC、红外等表征,及耐水性和力学性能的测试,发现含苯基恶唑啉2.5%的水性聚氨酯性能最好,耐水性得到很大的提高。但随着苯基恶唑啉含量的进一步增大,聚氨酯的稳定性逐渐降低,故2.5%为最佳配方。
以六亚甲基二异氰酸酯(HDI)、三羟甲基丙烷(TMP)为原料合成了一种新型的低游离多异氰酸酯基团的TMP低聚体。再以此低聚体、聚己内酯多元醇(PCL-2000)、聚碳酸酯多元醇(PCD-1000)、二羟甲基丙酸(DMPA)、异佛尔酮二异氰酸酯(IPDI)为主要原料合成了WPU。经过红外、耐水性和力学性能的测试表征,改性后的水性聚氨酯综合性能得到提高。
Water-borne polyurethane prepolymer-A compound-was prepared with PC、PCL、DMPA as major materials, B compound was prepared with triazole and IPD1/IPTS. A compound and B compound were mixed with proper ratio and improvements of properties of modified water-borne polyurethane were found through various tests. Water-borne polyurethane was prepared with PCD、PCL、IPDI、DMPA and different ratios(0.5%、1.0％、1.5%、2.0%、2.5%) of phenyl-oxazole. TG、XRD、DSC、IR、water-resistance and mechanical properties of different modified systems were tested and it was found that water-borne polyurethane containing 2.5% phenyl-oxazole performed best among the above modified systems. However, along with the further increase content of phenyl-oxazole,polyurethane stability reduced gradually, for the best formula is to 2.5%.
An oligomer containing low free isocyanate group was prepared with HDI and TMP, and was used as a major component in the preparation of water-borne polyurethane together with PCL、PCD、DMPA and IPDI. Better over-all performance of modified water-borne polyurethane was observed through IR、water-resistance and mechanical properties.
引文
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