双马来酰亚胺改性无溶剂环氧胶粘剂的研究

以双马来酰亚胺(BMI)、环氧树脂、芳香二胺等为原料,研制 BMI 改性的无溶剂环氧胶粘剂的耐热性能良好,其使用温度为-60～250℃。重点讨论了配方、组成与性能的关系。     

Polyurethane wood adhesive from palm oil-based polyester polyol

Polyurethane (PU) adhesives for wood bonding were prepared from palm oil-based polyester polyol in a solventless condition that reduces the risk of volatile organic compounds to human health and the environment. The polyester polyol was synthesized from epoxidized palm olein prior to reacting with polymeric 4,4′-methylene diphenyl diisocyanate (pMDI) and toluene 2,4-diisocyanate (TDI) to produce wood-bonding PU adhesives. The effect of glycerol cross-linker, dibutyltin dilaurate catalyst and NCO/OH ratio on lap shear strength and pot life of the PU adhesives were studied. The green strength of the PU adhesives was achieved on day 4 for TDI-based adhesives and day 5 for pMDI-based adhesives. The newly formulated PU adhesives have superior chemical resistance in cold water, hot water, acidic medium and alkaline medium by only showing light deterioration (2–8%) in lap shear strength. The PU adhesives prepared from pMDI exhibited higher lap shear strength and thermal stability as compared to adhesives prepared from TDI adduct. Both adhesives have improved mechanical performance (two folds higher in lap shear strength) as compared to commercial wood bonding adhesives.     

新型改性脂肪胺固化剂的合成及其在管道减阻耐磨无溶剂涂料中的应用

合成了一种新型的改性脂肪胺固化剂，并以此制备了用于天然气管道减阻耐磨的无溶剂涂料。该固化剂赋予涂层优良的机械性能、良好的耐盐雾性和耐化学介质浸泡性。通过电化学阻抗谱对该涂层的耐腐蚀性进行了评价，并对其减阻效果进行了研究。     

无溶剂丙烯酸系压敏胶的研究进展

简单地介绍了无溶剂型丙烯酸系压敏胶的优点,主要概述了国内两种无溶剂型丙烯酸系压敏胶,即热熔型和辐射固化型丙烯酸系压敏胶粘剂的研究进展,并结合实际发展情况,分析了丙烯酸系压敏胶的发展趋势。     

Synthesis and characterization of bio-based benzoxazines derived from thymol

In the present study, bio-based benzoxazine resins were synthesized from bio-based phenolic compound; thymol, and three different amines; ethylamine, aniline and 1,6-diaminohexane, and paraformaldehyde by solvent-free condensation reaction. The chemical structures of bio-based benzoxazines; T-ea (thymol, ethylamine), T-a (thymol, aniline), and T-dh (thymol, 1,6-diaminohexane) were characterized by proton nuclear magnetic resonance spectroscopy, Fourier transform infrared (FTIR) spectroscopy, elemental analysis, and high-resolution mass spectrometry. The curing studies of T-ea, T-a, and T-dh bio-based benzoxazines were performed by stepwise thermal treatment at 150, 175, 200, 225, and 250 °C. The polymerization (ring-opening and crosslinking reactions) of T-ea, T-a, and T-dh bio-based benzoxazines was investigated by FTIR spectroscopy. Cure analysis was conducted using differential scanning calorimetry and the changes in thermal properties of the T-ea, T-a, and T-dh bio-based benzoxazine resins and their corresponding thermally crosslinked polybenzoxazines PT-ea, PT-a, and PT-dh were studied by thermogravimetric analyzer. The results indicated that all the thymol-based polybenzoxazines have shown enhanced thermal stability. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47371.     

无溶剂双组分热喷快固化防腐涂料的研制与应用

针对我国石油沥青管道涂层的更新,及常用的环氧树脂类涂层和煤焦油磁漆涂层的补口,通过中间物质解决了石油沥青与环氧树脂的互溶性问题,研制出用于现场大修和补口的双组分厚浆型热喷快固化石油沥青聚氨酯涂料。采用高压无气喷涂,可作为新型重防腐涂料品种用于腐蚀防护领域。     

蒸煮袋用复合薄膜工艺分析及检测重点

干式复合工艺历史悠久,技术成熟,系列新国标如GB/T 10004的实施虽然对其有所限制,但仍无法阻挡干式复合工艺在蒸煮用复合薄膜的舞台上闪耀光芒。然而,这却给无溶剂复合工艺提供了良好的发展契机。随着两种工艺逐渐应用到蒸煮袋的制备中,复合薄膜的剥离强度和摩擦系数的影响因素更为复杂,仍是重点检测项目,需要包装生产企业加以重视。     

乙烯基酯树脂改性聚酯亚胺无溶剂浸渍漆的性能研究

采用乙烯基酯树脂对聚酯亚胺浸渍漆进行改性,制备了一种乙烯基酯改性聚酯亚胺无溶剂浸渍漆,对该漆的吸水性、耐化学药品性、粘结强度和储存稳定性进行测试,并对其进行红外光谱分析。结果表明:乙烯基酯树脂的加入可以改善聚酯亚胺无溶剂浸渍漆的漆片的吸水性、耐化学药品性和粘结强度。乙烯基酯树脂改性聚酯亚胺浸渍漆的综合性能良好,适用于中小型电机、变压器、电器等线圈的绝缘浸渍处理。     

无溶剂自流平环氧地坪漆的配方设计与施工应用

重点阐述环氧自流平涂料的配方组成及施工应用中的注意事项.     

A Polyester/Polypyrrole Textile-Based Ultrasensitive Wearable Microdistance Sensor

Microdistance sensor, which can accurately detect the microdistance change, possesses significant applications in the cutting-edge technologies including biomedicine, energy storage, and info-communications. However, the high cost, complicated operation, and stringent testing requirements of the existing microdistance sensors limit their widespread application in the frontier fields, especially for the intelligent wearable electronics. Herein, a novel mechanism to detect microdistance change is developed, in which the external microdistance brings a change in the thickness of conductive textile and further converts into a distinguishable electrical signal. The polyester/polypyrrole (PET/PPy) conductive textile is fabricated via in situ solventless polymerization, and the derived microdistance sensor exhibits an ultrahigh sensitivity of 179 m⁻¹ within the detection region of 10–480 µm, a high resolution up to 5 µm, and good stability. The excellent sensing performance can be attributed to the high elasticity, deformation-recovery property, and 3D network structures of the PET/PPy conductive textile. Furthermore, the wearable sensor is applied to detect the microdistance changes in human and robot activities, providing an efficient and low-cost solution for microdistance detection in intelligent medical, health monitoring system, and biomimetic robot.