Pai-Shan Pa
材料科学技术（英文）
A reuse fabrication module using micro electroetching as a precision machining process with a new design of a slant-form tool to remove the defective indium-tin-oxide (ITO) nanostructure from the optical poly-ethyleneterephthalate (PET) surfaces of digital paper display is presented in current studies. The low yield of ITO thin film deposition is an important factor in optoelectronic semiconductor production. The adopted precision reuse process requires only a short period of time to remove the ITO nanostructure easily and cleanly, which is based on technical and economical considerations and is highly efficient. In the current experiment, a large inclined angle of the cathode and a small end radius of the anode take less time for the same amount of ITO removal. A higher feed rate of the optical PET diaphragm combines with enough electric power to drive fast micro electroetching. A small rotational diameter of the anode accompanied by a small width of the cathode corresponds to a higher removal rate for the ITO nanostructure. A pulsed direct current can improve the effect of dreg discharge and is advantageous to couple this current with the fast feed rate of the workpiece. This improvement is associated with an increase in current rating. High rotational speed of the slant-form tool can improve the effect of dregs discharge and is advantageous to associate with the fast feed rate of the workpiece (optical PET diaphragm).
关键词:
Reuse fabrication
Pai-Shan Pa
材料科学技术（英文）
A reuse fabrication module using micro electroetching as a precision machining process with a new design of a slant-form tool to remove the defective indium-tin-oxide (ITO) nanostructure from the optical poly-ethyleneterephthalate (PET) surfaces of digital paper display is presented in current studies. The low yield of ITO thin film deposition is an important factor in optoelectronic semiconductor production. The adopted precision reuse process requires only a short period of time to remove the ITO nanostructure easily and cleanly, which is based on technical and economical considerations and is highly efficient. In the current experiment, a large inclined angle of the cathode and a small end radius of the anode take less time for the same amount of ITO removal. A higher feed rate of the optical PET diaphragm combines with enough electric power to drive fast micro electroetching. A small rotational diameter of the anode accompanied by a small width of the cathode corresponds to a higher removal rate for the ITO nanostructure. A pulsed direct current can improve the effect of dreg discharge and is advantageous to couple this current with the fast feed rate of the workpiece. This improvement is associated with an increase in current rating. High rotational speed of the slant-form tool can improve the effect of dregs discharge and is advantageous to associate with the fast feed rate of the workpiece (optical PET diaphragm).
关键词:
Reuse fabrication
金旭东
,
杨云峰
,
胡国胜
,
王标兵
高分子材料科学与工程
用DSC研究了熔融缩聚法制备的PA6/PA66/PA11共聚物的等温结晶行为.用Avrami方程分析了PA6/PA66/PA11的等温结晶动力学,其Avrami指数n值介于2.34～2.88之间,表明PA6/PA66/PA11是以二维盘状生长和三维球晶生长并存的球状晶体,然后计算了相关的结晶动力学参数.最后用Hoffman-Weeks理论计算出了共聚物的平衡熔点.偏光显微镜分析表明11-氨基十一酸的加入,使得共聚尼龙的球晶粒径进一步细化,数目增多.
关键词:
尼龙11
,
尼龙6
,
尼龙66
,
共聚物
,
等温结晶动力学
周光大
,
姚臻
,
曹堃
,
李伯耿
高分子材料科学与工程
采用差示扫描量热法研究了熔融共混聚己内酰胺/聚对(间)苯二甲酸己二胺(PA6/PA6IcoT)相容体系的结晶温度、结晶程度以及结晶动力学,并通过热台偏光显微镜、广角X射线衍射仪观察了PA6/PA6IcoT共混体系的结晶相形态和晶体结构.结果表明,共混物的结晶行为与其组成、结晶温度区域密切相关.在非等温结晶时,随着非晶态PA6IcoT 含量的增加,PA6相的相对结晶度增加,部分晶体结构由γ晶型转变为较完善的α晶型.在较高温度区域结晶时,少量的PA6IcoT就能使串并的晶核分开,形成大量微小晶粒.当PA6IcoT含量继续增加时,球晶数目会减少但尺寸增大.等温结晶动力学研究发现,结晶速度随PA6IcoT含量的提高而下降,Avrami指数值在4.5～6之间,并随着结晶温度升高而增大.
关键词:
聚己内酰胺
,
聚对(间)苯二甲酸己二胺
,
相容共混
,
结晶
欧育湘
高分子材料科学与工程
综述了无卤阻燃PA的最新研究进展,包括三聚氰胺衍生物(主要是其氰尿酸盐MC及聚磷酸盐MPP)和反应型磷化合物阻燃的PA,以及阻燃PA/无机物纳米复合物.讨论了上述几类阻燃PA的现状及阻燃机理,预测了新世纪前10年阻燃PA的发展趋势,并提出了今后宜加强的阻燃PA的研究领域.
关键词:
阻燃聚酰胺
,
无卤阻燃剂
,
反应型阻燃剂
,
纳米复合材料
邓鑫
,
戴文利
,
罗志强
,
郑云龙
高分子材料科学与工程
初步研究了聚酰胺6 (PA 6)/N,N'-乙撑双四溴邻苯二甲酰亚胺(NEBT)化合物体系着色的原因,认为是PA6分子链与NEBT分子中极性基团之间形成了氢键而自组装成发色基团.利用傅立叶红外光谱法(FT-IR)检测了PA6与NEBT之间氢键的作用.采用变温FT-IR研究比较了PA6与PA6/NEBT(PA6NET)分子间氢键的温度依赖性,研究表明,PA6NET分子间氢键具有较高的热稳定性.利用差热分析法(DSC)研究了PA 6与PA6NET的结晶与熔融行为.
关键词:
聚酰胺6
,
N,N'-乙撑双四溴邻苯二甲酰亚胺
,
发色基团
马海燕
,
刘兆峰
,
张军
,
马海军
高分子材料科学与工程
以PA6/PA66共聚物为原料,纺制大直径单丝。对大直径共聚尼龙单丝初生丝的后拉伸性能进行研究,主要分析拉伸温度、拉伸方式、拉伸倍率及其分配对单丝力学性能的影响,同时测定共聚尼龙单丝结构并与相关均聚物进行对比。研究了口模拉伸与常规拉伸对共聚尼龙单丝力学性能的影响。实验表明,采用二级拉伸方式时,最佳拉伸倍率为4.7倍,其中一级拉伸倍率占比85%。热水拉伸温度为90℃,热风拉伸温度为180℃。
关键词:
共聚尼龙
,
拉伸倍率
,
温度
,
力学性能
王元瑞
,
任亮
,
孟庆新
,
孙树林
复合材料学报
采用共辐照接枝法合成UHMWPE-g-AA接枝共聚物;采用共混技术制备UHMWPE/PA1010合金.以UHMWPE-g-AA接枝共聚物作为UHMWPE/PA1010合金增容剂.由于PA1010与UHMWPE-g-AA有较强的相互作用,UHMwPE/PA1010合金的冲击强度和断裂伸长率提高,韧性得到改善;同时,这种相互作用限制了PA1010的结晶,使PA1010中正常的结晶含量减少,结晶温度升高.SEM结果表明,增容作用使基体与分散相间界面张力减小,粘结性增强,从而使分散相的粒子尺寸减小,分布更加均匀,拉伸断面显示明显的牵拉现象.共混体系的摩擦系数与纯PA1010相比明显降低,摩擦时在PA1010表面形成完整UHMWPE的润滑膜,使磨耗量减小,摩擦系数降低.
关键词:
PA1010
,
UHMWPE
,
UHMWPE-g-AA
,
增容
肖华明
,
罗文波
,
吴国忠
,
赵荣国
高分子材料科学与工程
通过浸水实验、缺口冲击断裂实验和动态流变测试,考察了PTFE含量对PTFE/PA6和PTFE/PA66共混物的吸水率、冲击断裂强度及熔体黏度的影响以及熔体黏度随温度和频率的变化规律.结果表明,PTFE/PA6和PTFE/PA66共混物的吸水率均随着PTFE含量的增加而减小,即PTFE的加入抑制了共混物的吸水性.两种共混物的冲击强度比纯PA明显降低,但是吸收水对两种共混物冲击强度的影响不显著.随着PTFE含量的增加,共混物熔体的黏度先减小后增加,说明适量的PTFE可以改善共混物的成型加工特性.共混物熔体的黏度随加载频率的增大而降低,符合假塑性流体流动规律.有趣的是,对于PTFE/PA6共混物的黏度随着温度的升高而减小,而PTFE/PA66共混物黏度随着温度升高近似成指数规律增大.
关键词:
PTFE/PA6共混物
,
PTFE/PA66共混物
,
吸水率
,
冲击强度
,
复黏度
