共查询到20条相似文献,搜索用时 156 毫秒
1.
为了获得具有良好综合性能的纸基覆铜板,以聚酰亚胺(PI)短切纤维和对位芳纶浆粕为原料,硅微粉为填料制备的加填PI纸的纤维纸,采用PI树脂作为基体树脂,制备了加填PI纸基覆铜板,研究了硅微粉对于PI纤维纸力学性能的影响以及对于纸基覆铜板介电性能和热学性能的影响。结果表明,硅微粉的加入,虽然在一定程度上影响了覆铜板的介电性能,但是有利于改善PI纤维纸的力学性能,同时提高覆铜板的耐热性能,使得最终制备而成的纸基覆铜板具有良好的综合性能,其中介电常数Dk为3.36,介电损耗Df介于0~0.02之间,热分解温度Td-5%为511℃,热膨胀系数CTE为3.31μm/(m·℃)。 相似文献
2.
王曙中 《高科技纤维与应用》2009,34(4):15-18,27
介绍芳纶浆粕和芳纶纸的发展概况、应用领域及市场前景情况,对国产芳纶纸、NOMEX纸和对位芳纶纸进行简单比较,认为芳纶纸的关键技术是纤维原材料、分散流送技术、斜网成型技术和热轧技术,并对国内芳纶纸的发展提出一些看法。 相似文献
3.
4.
对国产对位芳纶纸与T412 Nomex纸分别制作的3种规格蜂窝,并进行了主要物理和力学性能对比分析。结果表明,国产对位芳纶纸蜂窝主要性能优于T412 Nomex纸的NH-1蜂窝,基本能够满足用户的使用要求,但其对位芳纶纸在制备的精度上仍需要改进。 相似文献
5.
采用黏度法、X射线衍射法、光学显微镜及扫描电镜、差示扫描量热等手段对对位芳纶短纤维的分子结构、相对分子质量(MW)、聚集态结构、表面形貌结构和热性能进行了研究;采用槽式打浆机对对位芳纶进行打浆制得对位芳纶浆粕,探讨对位芳纶的结构对其浆粕化工艺及浆粕性能的影响。结果表明:对于特性黏数为1.80~3.97 dL/g的对位芳纶,其MW为(1.29~2.72)×104,结晶度为46.51%~57.10%,最大失重率为37.74%~46.90%;对位芳纶表面光滑,纤维呈刚性伸直状,MW大的芳纶,其纤维表面分丝帚化;MW和结晶度是影响对位芳纶强度、浆粕化工艺以及浆粕性能的重要因素,在制备对位芳纶浆粕时,应选择MW大于2×104,作用力大于纤维内部的次价力而小于主价力,在保证纤维长度的情况下,作用力越大,分丝帚化效果越好。 相似文献
6.
7.
本文全面测试、分析、研究了苏联的APMOC芳纶纤维和CBM芳纶纤维的性能,包括:力学性能,热物理性能、热分析、X射线衍射分析、扫描电镜表面形态与缺陷分析,红外光谱分析等,并与美国杜邦公司生产的Kevlar 49芳纶纤维进行了全面对比。研究表明APMOC芳纶纤维和CBM芳纶纤维在力学性能和热性能上都优于Kevlar 49芳纶纤维。 相似文献
8.
对位芳纶生产和应用技术进展(Ⅰ) 总被引:4,自引:0,他引:4
简介对位芳纶的供需和研发概况,着重叙述PPTA型芳纶、共聚型芳纶、俄罗斯芳纶等重要对位芳纶产品以及PBO纤维、M5纤维等相关高性能纤维的生产技术和主要性能,探讨了开发生产高性能纤维的通用技术;分析了对位芳纶应用的现状和技术;预测对位芳纶生产技术和应用技术的发展趋势。 相似文献
9.
10.
简介对位芳纶的供需和研发概况;着重叙述PPTA型芳纶、共聚型芳纶、俄罗斯芳纶等重要对位芳纶产品以及PBO纤维、M5纤维等相关高性能纤维的生产技术和主要性能,探讨了高性能纤维开发生产的通用技术;分析了对位芳纶的应用现状和技术;探讨对位芳纶生产技术和应用技术的发展趋势。 相似文献
11.
12.
13.
用国产对位芳纶纸制造AC-KH型蜂窝,测试其力学性能及介电性能,并将其与美国赫氏公司用杜邦对位芳纶纸制的同等规格的HRH-36型蜂窝进行力学性能对比.结果表明,国产AC-KH型蜂窝与赫氏HRH-36型蜂窝的力学性能相当,甚至部分数据还优于HRH-36; AC-KH型蜂窝的介电常数和介电损耗值都非常低. 相似文献
14.
15.
A high‐performance matrix is the key base for the fabrication of high‐frequency copper‐clad laminates. A high‐performance resin system based on commercial poly(phenylene oxide) (PPO) and 2,2′‐bis(4‐cyanatophenyl) isopropylidene (BADCy), coded as PPO‐n/BADCy (where n is the weight parts of PPO per 100 weight parts of BADCy), was developed. The effect of PPO on the key properties, including the dielectric and thermal properties, water resistance, and toughness, of the cured resins was investigated extensively. The results show that PPO not only catalyzed the curing reaction of BADCy but also reacted with BADCy to form a single‐phase structure. Furthermore, compared with the cured BADCy resin with 1 phr epoxy resin as a catalyst, the cured PPO‐n/BADCy resins had significantly increased impact strengths and decreased dielectric constants, loss, and water resistance. The reasons behind these desirable improvements are discussed from the view of structure–property relationships. These results suggest that the PPO‐n/BADCy system has great potential to be used as a matrix for high‐frequency copper‐clad laminates or other advanced composites. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献
16.
A novel method to prepare high performance copper clad laminates (CCLs) was developed by using bismaleimide/aluminum borate (Al18B4O33) whisker hybrid as the matrix. The typical important properties such as thermal, mechanical, and dielectric properties of CCLs were investigated in detail. Results show that the incorporation of surface treated Al18B4O33 whiskers with suitable concentration can noticeably increase the flexural strength and modulus, interlayer shear strength, the heat distortion temperature, as well as dielectric properties of the CCLs. Intensive studies show that the improved concrete strength of the matrix and that in the direction of thickness of CCLs are contributed to the noticeable improvement of mechanical properties of CCLs by using the hybrid matrix. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1325–1331, 2007 相似文献
17.
A composite was prepared that contained diglycidyl ether of tetrabromobisphenol A (DGETBA) and 1,5‐di(2,3‐epoxypropoxy)naphthalene (A), 4,4′‐bis(2,3‐epoxypropoxy)benzylideneaniline (B), or 4,4′‐bis(2,3‐epoxypropoxy)biphenyl (C), and then was cured using different ratios of dicyandiamide (DICY). The results of DSC, TGA, coefficient of thermal expansion, dielectric constant, and dissipation factor testing of the composite epoxy resins were analyzed, and investigation of the copper‐clad laminate using the composite epoxy resins as prepreg was also performed. Additionally, moisture absorption, peel strength, arc resistance, comparative tracking index, and flammability of the copper‐clad laminate were examined. Clearly, some of the physical or mechanical properties of the composite and the copper‐clad laminate can be improved by optimal addition of naphthalene–phenyl‐based epoxy. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 95: 1485–1492, 2005 相似文献
18.
19.