水量對(duì)水性聚氨酯聚集形態(tài)及粘接性能的影響
發(fā)布時(shí)間：2019-02-11 08:20
【摘要】：以聚己二酸1,4-丁二醇酯二醇(PBA)為軟段,以異氟爾酮二異氰酸酯(IPDI)、2,2-二羥甲基丙酸(DMPA)、一縮二乙二醇(DEG)、水為硬段合成了一系列水性聚氨酯(WPUs),探討了水加入量對(duì)WPUs性能的影響。通過(guò)傅里葉變換紅外光譜測(cè)試(FT-IR)、粒徑測(cè)試、凝膠滲透色譜測(cè)試(GPC)、差示掃描量熱測(cè)試(DSC)、X-射線衍射測(cè)試(XRD)、熱重測(cè)試(TGA)、力學(xué)性能測(cè)試等對(duì)其結(jié)構(gòu)和性能進(jìn)行表征。通過(guò)紅外曲線擬合結(jié)果、DSC和XRD測(cè)試結(jié)果證實(shí),隨著加入體系中水量的增加,氫鍵化N-H伸縮振動(dòng)峰強(qiáng)度增加,WPUs結(jié)晶度降低。隨著水量的增加,乳液平均粒徑增大且分布變寬,同時(shí)WPUs的分子量及分子量分布系數(shù)逐漸增加;膠膜的拉伸強(qiáng)度和斷裂伸長(zhǎng)率均呈現(xiàn)先增大后減小的趨勢(shì),T型剝離強(qiáng)度顯示同樣的趨勢(shì)。力學(xué)性能測(cè)試結(jié)果表明,當(dāng)水加入量為0.94%(wt)時(shí),膠膜的力學(xué)性能最佳,拉伸強(qiáng)度達(dá)36.7 MPa,斷裂伸長(zhǎng)率達(dá)1026.5%;當(dāng)水加入量為0.74%(wt)時(shí),水性聚氨酯的T型剝離強(qiáng)度達(dá)到最大值,為1.9 N×cm~(-1)。
[Abstract]:A series of waterborne polyurethane (WPUs), was synthesized by using polyadipate 1-butanediol diol (PBA) as soft segment and isoflurone diisocyanate (IPDI), _ 2o _ 2-dimethylolpropionic acid (DMPA), / diethylene glycol (DEG),) as hard segment. The effect of water addition on the properties of WPUs was discussed. Fourier transform infrared spectroscopy (FT-IR), particle size measurement, gel permeation chromatography, (GPC), differential scanning calorimetry, (DSC), X-ray diffraction, (XRD), thermogravimetry, (TGA),. Its structure and properties were characterized by mechanical properties test. The results of IR curve fitting DSC and XRD show that the intensity of N-H stretching vibration peak increases and the crystallinity of WPUs decreases with the increase of water content in the system. With the increase of water content, the average particle size increases and the distribution becomes wider, and the molecular weight and molecular weight distribution coefficient of WPUs increase gradually. The tensile strength and elongation at break of the film increased first and then decreased, and the T-type peeling strength showed the same trend. The results of mechanical properties test show that when the water content is 0.94% (wt), the mechanical properties of the film are the best, the tensile strength reaches 36.7 MPa, and the elongation at break reaches 1026.5%. When the water content is 0.74% (wt), the T-type peeling strength of waterborne polyurethane reaches the maximum value, which is 1.9N 脳 cm~ (-1).
【作者單位】： 安徽大學(xué)化學(xué)化工學(xué)院安徽省綠色高分子重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】：O631.11
本文編號(hào)：2419553
[Abstract]:A series of waterborne polyurethane (WPUs), was synthesized by using polyadipate 1-butanediol diol (PBA) as soft segment and isoflurone diisocyanate (IPDI), _ 2o _ 2-dimethylolpropionic acid (DMPA), / diethylene glycol (DEG),) as hard segment. The effect of water addition on the properties of WPUs was discussed. Fourier transform infrared spectroscopy (FT-IR), particle size measurement, gel permeation chromatography, (GPC), differential scanning calorimetry, (DSC), X-ray diffraction, (XRD), thermogravimetry, (TGA),. Its structure and properties were characterized by mechanical properties test. The results of IR curve fitting DSC and XRD show that the intensity of N-H stretching vibration peak increases and the crystallinity of WPUs decreases with the increase of water content in the system. With the increase of water content, the average particle size increases and the distribution becomes wider, and the molecular weight and molecular weight distribution coefficient of WPUs increase gradually. The tensile strength and elongation at break of the film increased first and then decreased, and the T-type peeling strength showed the same trend. The results of mechanical properties test show that when the water content is 0.94% (wt), the mechanical properties of the film are the best, the tensile strength reaches 36.7 MPa, and the elongation at break reaches 1026.5%. When the water content is 0.74% (wt), the T-type peeling strength of waterborne polyurethane reaches the maximum value, which is 1.9N 脳 cm~ (-1).
【作者單位】： 安徽大學(xué)化學(xué)化工學(xué)院安徽省綠色高分子重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】：O631.11
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