Abstract:

A new type multifunctional waterborne Uv-curing polyurethane acrylate emulsion(PUA) with core-shell structure was synthesized from isophoronediisocyanate(IPDI), polytetrahydrofuran dimethylolpropionic acid(DMPA), pentaerythritol triacrylate(PETA). The polymer was characterized by means of Infrared Spectrum(FT-IR), Gel permeation chromatography(GPC), carbon-13 nuclear resonance magnetic spectrometry(¹³ CNMR ) 、transmission electron microscope(TEM),dynamic Chanical analysis (DMA). And the content of C=C was measured by means of chemical titration. The results showed that the synthesized resin was multifunctional waterborne Uv-curing polyurethane acrylate with highly branched chain through FT-IR, ¹³ CNMR analysis; The average molecular weight(Mn)and particle size distribation(D of the polymer were 11 374 and 3.75 respectively through GPC analysis; the morpho-core-shell structure and regular morphology logical structure of the most latex particle was sphere with the through TEM analysis; the glass transition temperature( T_g)of the multifunctional polymers coating was -39. 4 ℃ through DMA analysis. Tanδ curve didn't obviously appear double peaks or multi-peaks or multi-peaks, soft segment and hard segment had good compatibility: the final content of C=C was 4.9 meq/g through chemical titration analysis.

Key words: glycerol, waterborne Uv-curing, pentaerythritol triacrylate: polyfunctionality: polyurethane acrylate

摘要：

以异佛尔酮二异氰酸酯（ＩＰＤＩ）、丙三醇、聚四氢呋喃醚二醇（ＰＴＭＯ）、二羟甲基丙酸（ＤＭＰＡ）、季戊四醇三丙烯酸酯（ＰＥＴＡ）为原料，合成了一种具有核壳结构的新型多官能度水性光敏聚氨酯丙烯酸酯（ＰＵＡ）乳液。通过红外光谱（ＦＴ－ＩＲ）、凝胶渗透色谱（ＧＰＣ）、核磁共振碳谱（^１３ＣＮＭＲ）、透射电镜（ＴＥＭ）、动态热力学分析测试（ＤＭＡ）等物理测试手段对聚合物结构进行了表征，并通过化学滴定测定Ｃ=Ｃ双键的含量。ＦＴ－ＩＲ、ＮＭＲ分析表明，合成得到的树脂是带有多支链的多官能度水性光敏聚氨酯丙烯酸酯（ＰＵＡ）；ＧＰＣ分析表明，合成的多官能度 ＰＵＡ聚合物的数均相对分子质量（Ｍｎ）和分散度（Ｄ）分别为１１３７４和 ３.７５；ＴＥＭ分析表明，乳胶粒呈现一定的核壳结构，形态较规则，大多数呈球形；ＤＭＡ分析表明多官能度 ＰＵＡ聚合物涂膜的玻璃化转变温度为 －３９.４℃，ｔａｎδ曲线没有出现很明显的双峰或多峰，软段与硬段相容性好；化学滴定分析表明，此目标树脂中Ｃ=Ｃ双键的最终含量为４.９ｍｅｑ／ｇ。

关键词: 丙三醇, 水性光敏, 季戊四醇三丙烯酸酯, 多官能度, 聚氨酯丙烯酸酯