三嗪系列阻燃剂与磷酸三甲苯酯配合对丙烯酸系树脂的阻燃化研究

系统地研究了三嗪系列阻燃剂三烯丙基异三聚氰酸酯、二烯丙基溴丙基异三聚氰酸酯、二(2,3-二溴丙基)烯丙基异三聚氰酸酯、三(2,3-二溴丙基)异三聚氰酸酯等阻燃剂与磷酸三甲苯酯(TCP)配合对丙烯酸系树脂的阻燃效果及其阻燃机理。氧指数、热失重、微分热失重等研究结果表明,三嗪系列阻燃剂与TCP配合对丙烯酸系树脂有一定的阻燃作用,但无协同作用,阻燃剂按气相机理发挥作用,TCP单独使用阻燃丙烯酸系树脂,也有一定的阻燃作用。     

三嗪系列阻燃剂对丙烯酸系树脂的阻燃化研究

系统地研究了三嗪系列阻燃剂三烯丙基异三聚氰酸酯、二烯丙基溴丙基异三聚氰酸酯、二(2，3—二溴丙基)烯丙基异三聚氰酸酯、三(2，3—二溴丙基)异三聚氰酸酯等对丙烯酸系树脂的阻燃效果及其阻燃机理。利用氧指数、热失重、微分热失重等测试方法研究，结果表明三嗪系列阻燃剂对丙烯酸系树脂有一定的阻燃作用，阻燃剂按气相机理发挥作用，并且阻燃剂分子中双键的阻燃作用不容忽视。     

三嗪系列阻燃剂与氧化锑配合对丙烯酸系树脂的阻燃化研究

系统地研究了三嗪系列阻燃剂三烯丙基异三聚氰酸酯(TAIC)、二烯丙基溴丙基异三聚氰酸酯(DABC)、二(2,3-二溴丙基)烯丙基异三聚氰酸酯(DBAC)、三(2,3-二溴丙基)异三聚氰酸酯(TBC)等阻燃剂与三氧化二锑(Sb2O3)配合对丙烯酸系树脂的阻燃效果及其阻燃机理。氧指数(LOI)、热失重(TGA)、微分热失重(DTG)等研究表明,溴值低的DBAC、TBC和Sb2O3有协效作用,符合一般的卤-锑协同阻燃机理;而溴值高的TAIC、DABC和Sb2O3不但不具有协同效应,而且恶化原阻燃剂的阻燃效果;Sb2O3及其与三嗪系列阻燃剂配合阻燃丙烯酸系树脂,主要是发挥气相阻燃作用。     

双（2，3-二溴丙基）反丁烯二酸酯对丙烯酸系树脂的阻燃化研究

系统地研究了双（2,3-二溴丙基）反丁烯二酸酯（FR-2）及其与磷酸三甲苯酯（TCP）和三氧化二锑（Sb2O3）配合对丙烯酸系树脂的活性阻燃化研究。尉氧指数（LOI）、热失重（TGA）、微分热失重（DTG）等方法研究,结果表骧：FR-2对丙烯酸系树脂有一定的阻燃作用,但效果不短著。当FR-2与TCP或Sb203配用阻燃丙烯酸系树脂时,具有阻燃协同效应,阻燃效果很好。FR-2与TCP协效阻燃系统要优于FR-2与Sb2O3协效阻燃系统。     

TBC——一种新的高效阻燃剂

TBC学名为三(2,3-二溴丙基)异三聚氰酸酯,全名为1,3,5-三(2,3-二溴丙基)-均三嗪-2,4,6-三酮,它是一种新型、高效的添加型溴系阻燃剂。1974年,联邦德国开始研制,首先成功地用于发泡聚氨酯的阻燃。七十年代末,日本旭     

丙烯酸系聚合物阻燃剂

本文介绍了各种丙烯酸系聚合物阻燃剂的制备方法、性质和用途,其中包括有机磷酸酯和有机卤代磷酸酯、(2,3-二溴丙基)磷酸酯、含卤丙烯酸酯、铝系阻燃剂、卤化锡系列阻燃剂、卤化锑阻燃体系、2,3-二溴丙基羟基磷酸酯高效阻燃剂、甲基丙烯酸-2,3-二溴丙基酯以及烷(芳)基硫代次膦酸丙烯酯与甲基丙烯酸共聚物和含磷的甲基丙烯酸甲酯共聚物等。     

阻燃剂三（2，3—二氯丙基）异三聚氰酸酯（TCC）的合成研究

一、前言三(2,3—二氯丙基)异三聚氰酸酯[Tris(2,3—dichloropropyl)isocyanurate,以下简称TCC]全名为1,3,5—三(2,3—二氯丙基)一均三嗪—2,4,6—三酮[1,3,5-Tris-(2,3-dichloropropyl)—s—triazine—2,4,6—trionc],是一种带三嗪环的添加型含氯氮阻燃剂,与高效含溴阻燃剂TBC属同一系列产品。具有优良的阻燃性能、极低的挥发性、良好的相     

60吨/年新型阻燃剂TBC通过中试鉴定

TBC全称三(2,3—二溴丙基)异三聚氰酸酯,是一种带三嗪环的添加型高效溴系阻燃剂。具有优异的阻燃性、极低的挥发性和良好的相溶性,以及耐久、耐光、耐水和无毒等特性。属国外八十年代阻燃剂新品种,可广泛用作聚烯烃、发泡聚氨酯、不饱和聚酯、ABB、多种通用橡     

新型阻燃剂TBC技术鉴定会

TBC学名为三(2,3—二溴丙基)异三聚氰酸醋,是一种带三嗪环的添加型高效溴系阻燃剂。具有优异的阻燃性、极低的挥发性和良好的相溶性,以及耐久、耐光、耐水等特性。属国外高效燃阻剂的新品种,已广泛用于聚烯烃、发泡聚氨酯、不饱和聚酯、ABS、多种通用和特种橡胶以及合成纤维等的阻燃。     

提高阻燃剂TBC热稳定性的研究

<正> 一、前言阻燃剂TBC学名为三(2,3-二溴丙基)异三聚氰酸酯。是一种带三嗪环的添加型溴系阻燃剂,具有优异的阻燃性、很低的挥发性和良好的相容性,以及耐久、耐光、耐水和无毒等特性。可广泛用于聚烯烃、聚氨酯、聚苯乙烯、不饱和聚酯等塑料、多种橡胶和纤维的     

丙烯酸树脂对PVDF面漆性能的影响

研究了丙烯酸树脂对聚偏二氟乙烯（PVDF）面漆性能的影响。实验表明：丙烯酸树脂的组成结构对PVDF树脂的混溶性有影响。丙烯酸树脂结构中氢键给体的含量越多,丙烯酸树脂与PVDF树脂分散体的混溶性越差,聚甲基丙烯酸甲酯树脂与PVDF树脂的混溶性最好。外加强氢键给体也会破坏PVDF树脂与丙烯酸树脂形成的氢键,使体系的黏度和触变性急剧增加。     

高导热苯乙烯丙烯酸树脂复合材料制备及导热性能

苯乙烯丙烯酸树脂为墨粉主要组分,其导热性能提升可显著提高墨粉导热性能,进而延长打印、复印机使用寿命。通过在苯乙烯丙烯酸树脂中添加碳纳米管、石墨烯高导热单一或复合填料,在苯乙烯丙烯酸树脂构建连通导热网络以提高其导热性能。当苯乙烯丙烯酸树脂中添加0.75wt%多壁碳纳米管时,其导热系数可提高至0.1644 W/(m?K),增幅为31.31%;添加1.0wt%羧基改性多壁碳纳米管时,苯乙烯丙烯酸树脂导热系数可提高至0.1751 W/(m?K),增幅为39.86%;在苯乙烯丙烯酸树脂添加多壁羧基改性碳纳米管和石墨烯混合填料时,苯乙烯丙烯酸树脂导热系数可提升至0.2093 W/(m?K),增幅达到67.17%。表明碳纳米管和石墨烯混合填料可在苯乙烯丙烯酸树脂中形成有效的导热网络,从而显著提高苯乙烯丙烯酸树脂导热性能。     

Preparation and Characterization of Two-component Waterborne Poly-urethane Comprised of Water-soluble Acrylic Resin and HDI Biuret

A two-component waterborne polyurethane （2K-WPU） was prepared by mixing water-soluble acrylic resin and hexamethylene diisocyanate biuret, and then diluted for phase inversion with water. Compared with water-soluble acrylic resin, the phase inversion of 2K-WPU occurs at lower water content. It is indicated by TEM that 2K-WPU particles show a core-shell structure, in which HDI biuret is encapsulated by hydrophilic acrylic resin. 2K-WPU emulsion with HDI biuret has larger particle size and narrower distribution index, while for 2K-WPU emulsion with HDI isocyanurate, the latex not only has large particle size, but also has two-peak distribution. FTIR shows that the reaction between HDI biuret and acrylic resin can complete in 12h. In addition, studies on effect of composition of acrylic resin on performance of 2K-WPU show that narrowing the polar difference between water-soluble acrylic resin and HDI biuret and improving the miscibility of two components are the key to prepare the transparent and high gloss films with high crosslinking density.     

Structure and properties of epoxy resins modified with acrylic particles

The morphology and material properties of dicyandiamide (DICY)‐cured epoxy resins modified with acrylic particles consisting of a PBA (polybutyl acrylate) core and a PMMA (polymethyl methacrylate) shell and epoxy resins modified with acrylic rubber (PBA) particles alone were studied. It was found that the epoxy system modified with core/shell acrylic particles showed higher fracture toughness, indicating that the modification had a larger effect on improving the material properties of the epoxy resin. A characteristic shown by the core/shell acrylic particles is that they swell along with the epoxy resin under exposure to heat and gel before the latter cures. In this process, the epoxy resin penetrates the surface of the shell layer and a bond is formed between the epoxy matrix and the core/shell acrylic particles. This suggests that the epoxy matrix around the core/shell acrylic particles has the effect of increasing the level of energy absorption due to plastic deformation of the matrix. This is thought to explain why the epoxy resin modified with core/shell acrylic particles showed higher fracture toughness. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2955–2962, 1999     

Grafting onto polyester fibers. IV. Synergism during graft copolymerization of binary mixtures of vinyl monomers onto polyester fibers

Graft-copolymerization reactions of binary mixtures of vinyl monomers (acrylamide–acrylic acid and acrylonitrile–acrylic acid) with polyester fibers have been studied by chemical initiation technique using benzoyl peroxide as an initiator. The total graft add-on was determined gravimetrically, while the modified Kjeldahl's method for N-estimation was employed to determine acrylamide and acrylonitrile grafts in their mixtures with acrylic acid grafts. Synergism of very high order was noticed during the graft-copolymerization reactions. In the case of the acrylamide–acrylic acid system a very high order of synergism (129.15%) was noticed at equimolar proportions of the monomers in the grafting bath. Both acrylamide and acrylic acid showed synergistic influence over each other during graft-copolymerization reactions. In the case of the acrylonitrile–acrylic acid system, however, the presence of acrylonitrile reduced the graft yield of the acrylic acid component showing a negative synergism; but acrylic acid enhanced the acrylonitrile graft yield to a considerable extent. The results have been explained in terms of reactivity ratios of the monomers. The conductivity results of the monomer mixtures also supported the experimental results.     

Influence of Nature and Amount of Dispersant on Rheology of Aged Aqueous Alumina Gelcasting Slurries

Alumina slurries with three different levels of ammonium polyacrylate (Darvan 821 A) and dibasic ammonium citrate (DBAC) dispersants—lower than optimum, optimum, and higher than optimum—were chosen for investigation. The nature and amount of dispersants had a significant influence on viscosity and time-dependent behavior of freshly prepared and aged slurries. All slurries were subjected to static and dynamic aging treatments. All slurries were pseudoplastic in behavior, with the non-Newtonian index ( n ) being maximum for optimum amount of each of the dispersants. For freshly prepared slurries, hysteresis was the least for optimum amount and maximum for slurries with less than optimum amount of Darvan and DBAC dispersants. Slurries with below optimum amount of dispersant exhibited greatest aging. DBAC-based slurries experienced a greater percentage increase in viscosity than Darvan-based slurries during static aging. Biodegradability of DBAC contributed to aging of the DBAC-based slurries. All slurries, except the one with below optimum amount of DBAC, exhibited a decrease in viscosity after 48 h of dynamic aging. Static aging influenced the thixotropic behavior of slurries while dynamic aging had a minimal effect.     

Preparation and mechanism of free-radical/cationic hybrid photosensitive resin with high tensile strength for three-dimensional printing applications

A ultraviolet (UV)-curing free-radical/cationic hybrid resin is designed and developed by blending epoxy resin with an acrylic resin, including N-acryloyl morpholine, polyurethane acrylic ester (PUA), free-radical and cationic photoinitiator. During UV-curing, crosslinking locks the acrylate and epoxide polymers together through non-covalent interaction. Most likely, the interpenetrating polymer network (IPN) structure can be generated in the three-dimensional (3D)-printed objects. The obtained results from Fourier transform infrared spectroscopy (FT-IR) show that bisphenol A epoxy resin and acrylic resin are both successfully involved in the UV-curing process. In addition, the effects of the mass ratio of epoxy to acrylic resin and the UV irradiation time on the properties of the hybrid resin are systematically investigated using liquid crystal display (LCD) 3D printers. It is found that the tensile strength of the hybrid resin increases in a certain range and the elongation at the break maintains an upward trend with the increasing mass ratio. Finally, it is found that the shrinkage of the hybrid resin also depends on the mass ratio of epoxy to acrylic resin, which decreases with the increase of the epoxy resin content in a certain range. Thus, herein we propose a feasible UV-curing mechanism for the synthesis of hybrid resins for 3D printing applications.