挠性覆铜板用无卤阻燃环氧树脂及其固化剂的研究进展

为了适应无卤无铅绿色环保发展要求,挠性覆铜板(FCCL)的环保性能越来越受到大家的重视。其中环氧树脂及其固化剂的无卤化是FCCL无卤化的两个重要方面。本文综述了近年来国内外在无卤阻燃环氧树脂及其固化剂的研究进展,并对其今后的发展做一展望。     

无卤挠性覆铜板的应用研究

使用无卤三层法挠性覆铜板（FCCL）制备一款双面挠性印制电路板（FPC）,在钻孔、沉镀铜、层压、化学镀金等关键的制程后检测基材的尺寸稳定性,结果表明该无卤FCCL具备优异的尺寸稳定性和可加工性。     

挠性覆铜板（连载四）

五、挠性覆铜板 挠性覆铜板（Flexible Copper Clad Laminte,简称FCCL）,是由导体材料和绝缘薄膜等材料组成的。挠性覆铜板主要用于加工、制造挠性印制电路板（FPC）,广泛应用在通讯、计算机、汽车电子、照相机、仪器仪表等领域。按制造方法分类,挠性覆铜板可分成以下两类产品：（1）胶粘剂型挠性覆铜板。（2）无胶粘剂型挠性覆铜板。     

聚酰亚胺薄膜／超薄铜箔挠性覆铜板的研制

文章研究了聚酰亚胺薄膜覆以5μm铜箔的挠性覆铜板的工艺和性能。同时探讨了环氧改性丙烯酸酯树脂、聚乙烯醇缩丁醛(PVB)-环氧树脂、丁腈-酚醛-环氧树脂体系的胶粘剂对性能尤其是弯曲疲劳性能的影响，聚酚氧树脂改性环氧树脂胶粘剂显著提高了覆铜板的弯曲疲劳性能；研究了涂胶工艺、胶层厚度、     

一种无卤覆盖膜的制备

文章介绍了几种应用于FCCL中的无卤阻燃剂,并从阻燃机理上进行分析。本公司制备了一种无卤覆盖膜,其胶粘剂配方采用CTBN增韧双酚A型树脂和含磷环氧树脂混合树脂体系,配合添加型阻燃剂OP935和Al(OH)3,固化剂使用DDS和Dicy混合固化体系。经检测表明,该无卤覆盖膜储存期超过3个月,不仅阻燃性可达到UL 94 VTM-0级,而且综合性能优异,能满足应用的要求。     

LCP在挠性覆铜板中的应用进展

文章介绍了液晶聚合物（LCP）的特点及其在挠性覆铜板（FCCL）中的应用,尤其对日本近期的LCP基FCCL进行了综述,同时对比研究了LCP膜和PI膜制备的FCCL的性能,分析了两者的优缺点。     

高导热挠性铝基覆铜板用环氧胶粘剂的研究

采用高导热填料球形氧化铝填充环氧胶粘剂,并添加了适量离子捕捉剂有效地控制有害离子的离子迁移,利用该胶粘剂粘接铝箔和铜箔制备成挠性铝基覆铜板。文章中探讨了环氧胶粘剂的热固化温度和时间、球形氧化铝含量对胶膜热导率的影响,通过显微镜测试了导热填料在胶粘剂中的分散均匀性,最后确定最优配方制备出一种综合性能优异的挠性铝基覆铜板。     

当前我国FCCL产业相关政策及现状

正1我国FCCL产业的发展及现状1.1我国FCCL产业的发展我国(一般指中国大陆地区,下同。)挠性覆铜板(FCCL)从20世纪80年代开始研制,研制单位、企业有电子十五所、湖北化学研究院、原国营第704厂研究所等。1987年在原国营第704厂通过了"覆铜箔聚酰亚胺薄膜"和"覆铜箔聚酯薄膜"两种三层法挠性覆铜板的设计定型,并形成了1条自制的小     

印制线路板用无卤型覆铜板——玻纤布面·玻纤纸芯·环氧树脂JPCA-ES-03

1 适用范围按照JPCA-ES-01(无卤型覆铜板试验方法)进行测定,氯(Cl)、溴(Br)含量分别小于0.09wt％的覆铜板,定为无卤型覆铜板。本标准适用于印制线路板用玻纤布面、玻纤纸芯、环氧树脂、无卤型覆铜板(以下简称覆铜板)。备注1 本标准引用的标准如下: JIS C 5603 印制电路术语 JIS C 6481 印制线路板用覆铜板试验     

JPCA标准印制线路板用无卤型覆铜板——玻纤布·环养树脂 JPCA-ES-04-2000

1 适用范围按照 JPCA—ES—01(无卤型覆铜板试验方法)进行测定,氯(Cl)、溴(Br)含量分别小于0.09wt%的覆铜板,定为无卤型覆铜板。本标准适用于印制线路板用玻纤布、环氧树脂、     

环保型挠性覆铜板的研制

采用端羧基丁腈橡胶（CTBN）增韧改性含磷环氧树脂体系,配合使用添加型磷系阻燃剂SPB-100得到挠性覆铜板用胶液,以此制备的环保型挠性覆铜板不含卤素、锑和铅、汞、镉、六价铬等有害重金属,满足欧盟RoHS指令要求,板材剥离强度为1．25N／mm,阻燃性达到UL94 VTM-0级,且具备较好的尺寸稳定性、电性能和耐折性。     

聚乙烯阻燃光缆护套料的制备工艺研究

在低密度聚乙烯(PE)中添加了纳米氢氧化镁(Mg(OH2))和磷酸三苯酯(TPP)组成的协同阻燃剂,采用共混挤出的方法制备了纳米Mg(OH2)/PE阻燃光缆护套料.对制得的样品进行了氧指数(OI)、示差扫描量热(DSC)法和力学性能的测试,实验结果表明,样品的OI大幅度提高,力学性能和玻璃化温度均满足阻燃光缆护套的要求.     

Effect of Ni-Cr Layer on Adhesion Strength of Flexible Copper Clad Laminate

In this study, the effect of a Ni-Cr layer on the adhesion strength of flexible copper clad laminate (FCCL) was evaluated after thermal treatment. The changes in the chemical composition, morphology, and adhesion properties were characterized by scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and 90 deg peel test. The results showed that both the peel strength and thermal resistance of the FCCL increased with increasing Cr ratio. The thermal treatment of the FCCL increased the proportion of C-N bonds and reduced that of the C-O and carbonyl (C=O) bonds in the polyimide. The roughness of the fracture surface decreased with increasing thermal treatment temperature and holding time. The chemical function and roughness of the fracture surface were affected by the Ni-to-Cr ratio.     

A Large‐Area,Flexible, and Flame‐Retardant Graphene Paper

Similar to the paper‐making process, the efficient flame retardant graphene paper is conveniently obtained by using graphene oxide (GO) and hexachlorocyclotriphosphazene (HCCP) aqueous pulp. The “paper pulp” can also conceivably be used as ink to make other hydrophilic films become flame retardant paper. Further, the as‐prepared reduced GO‐HCCP paper (RGO‐HCCP paper), compared with GO‐HCCP paper, can maintain its intact structure for a longer time in an ethanol flame. As a consequence of these preparation methods, the bearing temperature of the as‐prepared graphene papers shows a significant increase.     

无卤型CEM-1覆铜板的开发

研究了采用含磷环氧树脂和氢氧化铝作为阻燃剂,开发出不含卤素和锑元素的无卤型CEM-1覆铜板。产品性能符合IPC-4101/4110标准,卤素含量达到JPCA-ES-01-1999标准要求。     

Polydopamine‐Graphene Oxide Flame Retardant Nanocoatings Applied via an Aqueous Liquid Crystalline Scaffold

A highly effective flame retardant (FR) nanocoating was developed by conducting oxidative polymerization of dopamine monomer within an aqueous liquid crystalline (LC) graphene oxide (GO) scaffold coating. Due to its high water content, the LC scaffold coating approach facilitated fast transport and polymerization of dopamine precursors into polydopamine (PDA) within the water swollen interlayer galleries. Uniform and periodically stacked (14.5 Å d‐spacing) PDA/GO nanocoatings could be universally applied on different surfaces, including macroporous flexible polyurethane (PU) foam and flat substrates such as silicon wafers. Remarkably, PDA/GO coated PU foam exhibited highly efficient flame retardant performance reflected by a 65% reduction in peak heat release rate at 5 wt% PDA/GO loading in an 80 nm thick coating. While many physically mixed flame retardants are usually detrimental to the mechanical properties of the foam, the PDA/GO coating did not affect mechanical properties substantially. In addition, the PDA/GO coatings were stable in water due to the intrinsic adhesion capability of PDA and the transformation of GO to the more hydrophobic reduced GO form. Given that PDA is produced from dopamine, a molecule prevalent in nature, these findings suggest that significant opportunities exist for new polymeric FRs derived from other natural catechols.     

Fabrication and adhesion strength of Cu/Ni-Cr/polyimide films for flexible printed circuits

The adhesion strength of a Cu/Ni-Cr/polyimide flexible copper clad laminate (FCCL), was evaluated according to the thickness of the Ni-Cr (Ni:Cr = 95:5 ratio) seed layer using the 90° peel test. The changes in the morphology, chemical bonding and adhesion properties were characterized by SEM, AFM and XPS. The peel strength of the FCCL increased with increasing thickness of the Ni-Cr seed layer, due to the increase in the ion bombardment caused by the higher power used in the Ni-Cr sputtering process. This increase in the FCCL peel strength was attributed to the lower proportion of C-N bonds and higher proportion of C-O bonds in the polyimide surface. The adhesion strength between the metal and polyimide was mostly attributed to the chemical interaction between the metal layer and the functional groups of the polyimide.     

无卤阻燃玻纤增强PA66工程塑料的改性研究

PA66是PA产品中产量最大、应用最广的品种,但存在较易燃烧、燃烧时容易起泡、滴落的缺点,极大的限制了其在各领域的进一步推广应用.目前,对PA66的改性研究主要集中在增强和阻燃两方面,玻纤增强PA66是对PA66增强改性使用最广泛的产品,本文研究不同阻燃剂对玻纤增强PA66阻燃性能的影响和增韧剂用量对无卤阻燃玻纤增强PA66综合性能的影响.研究结果为:红磷阻燃母粒和MCA按一定质量份进行复配协效阻燃,阻燃剂用量少且阻燃效果优异;马来酸酐接枝POE对无卤阻燃玻纤增强PA66体系有良好的增韧效果.     

Functionalizing Carbon Nanotubes by Grafting on Intumescent Flame Retardant: Nanocomposite Synthesis,Morphology, Rheology,and Flammability

An intumescent flame retardant, poly(diaminodiphenyl methane spirocyclic pentaerythritol bisphosphonate) (PDSPB) has been covalently grafted onto the surfaces of multiwalled carbon nanotubes (MWNTs) to obtain MWNT‐PDSPB and according nanocomposites were prepared via melt blending. After high density PDSPB (65 wt %) were attached to the MWNTs, core‐shell nanostructures with MWNTs as the hard core and PDSPB as the soft shell were formed. The resultant MWNT‐PDSPB was soluble and stable in polar solvents, such as DMF. The optical microscopy and TEM results showed that the functionalized MWNTs can achieve better dispersion in ABS matrix. The linear viscoelastic behavior indicated that MWNT‐PDSPB can form network structure at very low nanotube loading than un‐functionalized MWNTs. The results of flammability showed that better flame retardancy was obtained for ABS/MWNT‐PDSPB nanocomposites due to the better dispersion of MWNT‐PDSPB in ABS matrix. The flammability of the composites is strongly dependent on the network structure of nanotubes which reduces the diffusion of volatile combustible fragments generated by polymer degradation which diffuse towards the surface of the burning polymer to evaporate to feed the flame. The grafting of intumescent flame retardant of PDSPB can improve both the dispersion of nanotubes in polymer matrix and flame retardancy of the nanocomposites.