4A分子筛对EVA/APP/PETA复合材料阻燃性能的影响

以聚磷酸铵(APP)和聚对苯二甲酰乙二胺(PETA)复配制备了无卤阻燃乙烯-醋酸乙烯共聚物(EVA)/膨胀型阻燃体系(IFR)复合材料,通过极限氧指数仪、热失重分析仪(TG)和扫描电镜(SEM)分析了4A分子筛对复合材料的阻燃性能、热稳定性能和复合材料残炭表面形貌的影响。结果表明,当4A分子筛添加量为2%时,复合材料的极限氧指数达39%,比未添加4A分子筛的提高了4%,垂直燃烧达到V-0级。SEM表明,4A分子筛的加入提高了样品残炭表面致密度。     

SO4^2-／TiO2／La^3＋催化合成季戊四醇三丙烯酸酯

以自制的稀土改性固体超强酸SO4^2-／TiO2／La^3 为催化剂，通过酸醇直接酯化合成了季戊四醇三丙烯酸酯(PETA)，研究了反应条件对产率的影响、催化剂的制备条件对其催化活性的影响，得到较佳工艺条件，并简单探讨了催化剂的表面组成特征及催化机理。结果表明：当酸醇摩尔比为3．5：1，催化剂、阻聚剂用量分别为2％、1．5％(以酸、醇总质量计)，甲苯用量为55％(反应物总质量计)，120℃左右反应3h，产率可达78．5％；该固体酸催化剂可代替浓硫酸，是一种具有广泛应用前景的环境友好型催化剂。     

PETA熔融接枝PP/LDPE共混物的研究

研究了季戊四醇三丙烯酸酯熔融接枝PP／LDPE共混物体系中，各因素对产物熔体质量流动速率和熔体强度的影响，并对产物拉伸粘度和化学接枝情况等进行了测试及表征，实验结果表明，引发剂用量较低，单体用量较高时，产物的熔体质量流动速率小,熔体强度较高，拉伸粘度较大，且在拉伸过程中，产生了应变硬化效应；随着单体用量的增加，接枝率会有所上升。     

Development of Molecularly Imprinted Polymer in Porous Film Format for Binding of Phenol and Alkylphenols from Water

Molecularly imprinted polymers (MIPs) were fabricated on glass slides with a “sandwich” technique giving ~20 μm thick films. Methanol/water as a solvent, and polyethyleneglycol and polyvinylacetate as solvent modifiers, were used to give a porous morphology, which was studied with scanning electron microscopy and gravimetric analysis. Various MIPs were synthesized through non-covalent imprinting with phenol as the template; itaconic acid, 4-vinylpyridine, and styrene as monomers; ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, and pentaerythritol triacrylate (PETA) as cross-linkers. Binding and imprinting properties of the MIPs were evaluated based on phenol adsorption isotherms. Since phenol has only one weakly acidic hydroxyl group and lacks unique structural characteristics necessary for binding specificity, the preparation of selective MIPs was challenging. The recognition of phenol via hydrogen bonding is suppressed in water, while hydrophobic interactions, though promoted, are not specific enough for highly-selective phenol recognition. Nevertheless, the styrene-PETA MIP gave modest imprinting effects, which were higher at lower concentrations (Imprinting Factor (IF) = 1.16 at 0.5 mg·L⁻¹). The isotherm was of a Freundlich type over 0.1–40 mg·L⁻¹ and there was broad cross-reactivity towards other structurally similar phenols. This shows that phenol MIPs or simple adsorbents can be developed based on styrene for hydrophobic binding, and PETA to form a tighter, hydrophilic network.     

聚对苯二甲酰乙二胺成炭剂的制备及其应用

采用对苯二甲酰氯与乙二胺通过低温溶液聚合的方法合成了聚对苯二甲酰乙二胺(PETA),并将其作为碳源,聚磷酸铵(APP)作为酸源和气源组成膨胀型阻燃体系(IFR),对ABS进行阻燃效应研究.结果表明:PETA在APP的催化作用下能够很好的成炭,IFR的加入显著提高了ABS阻燃体系在高温下的残炭量;当APP的含量为25%,PETA的含量为12.5%时,ABS阻燃体系的极限氧指数为33,达到UL-94测试V-0级;SEM形貌分析也显示出成炭剂PETA的加入能促进阻燃体系在燃烧后表面形成均匀、致密的炭层结构.     

卷铝用改性丙烯酸树脂的合成

采用丙烯酸酯类单体、功能性单体——丙烯酸β-羟乙酯(HEA)、三羟甲基丙烷三丙烯酸酯(TMPTA)和季戊四醇三丙烯酸酯(PETA),合成了热固性丙烯酸树脂。与丁醇醚化的氨基树脂(582-2)、颜填料及助剂配合,制成了适用于铝箔的卷铝涂料。该涂料显示出优异的附着力、耐MEK擦拭和良好的T弯等性能。     

PETA与生物玻璃复合及其性能研究

这种材料是由具有PETA（四丙烯酸香戊四醇酯）液相树脂和生物玻璃复合而成。该材料含有硅氧烷－磷酸钙生物玻璃。本文论述了它们的复合及性能。     

An X‐ray Spectromicroscopy Study of Albumin Adsorption to Crosslinked Polyethylene Oxide Films

Synchrotron‐based X‐ray photoemission electron microscopy (X‐PEEM) is used to characterize the near surface composition of polyethylene oxide (PEO) combined with 1.5, 5, and 10 wt.‐% pentaerythritol triacrylate (PETA) crosslinker. It is found that as the concentration of PETA increases, it becomes the dominant component in the top 10 nm of the film surface. The same surfaces are also exposed to human serum albumin (HSA) and the distributions of the protein relative to PEO and PETA measured with X‐PEEM. A positive correlation is found between levels of PETA and HSA at the surface. Above PETA concentrations of 5 wt.‐%, HSA adsorption is significant, which suggests high levels of PETA (often used to immobilize PEO by crosslinking) can significantly reduce the non‐fouling properties of PEO.