搜索结果: 31-45 共查到“知识库 高分子材料学”相关记录113条 . 查询时间(2.27 秒)
在研究等离子聚合法所合成的聚对二甲苯(ppPX)薄膜的化学结构和性能的基础上, 考察了ppPX作为铜在Si--SiLK基体上阻隔层的应用可能性。在特定辉光射频条件下, ppPX膜表面的苯环能够保留。加热退火后, 铜向裸Si--SiLK和向经ppPX接枝修饰的Si--SiLK基体的扩散程度存在差异。经由Ar和N2载气所承载的对二甲苯单体所聚合得到的ppPX, 具有不同的结构和性能, 后者能改善铜和聚...
Effect of multiple injection moulding on some properties of polycarbonate
Engineering polymers Multiple injection moulding Recycling
2009/12/3
Purpose: The aim of this work was to investigate the influence of multiple (up to 6 times) injection moulding of polycarbonate (PC) on some properties of the obtained moulded pieces. The investigation...
Acceleration of charged particles in laser beam
Acceleration of charged particles Laser Maser Relativistic dynamics
2010/8/16
The interest in practical development of accelerating devices for charged particles recently has rapidly grown. The elaboration of new theoretical models and many successful experiments resulting in g...
Estimation of stresses in layers of dentures’ relining materials
Biomaterials Denture relining Strength Biting load
2009/12/2
Purpose: Durability tests of materials relining dentures should be carried out in conditions reflecting the real
loading that accompanies bite force transmission. The influence of geometry resulting ...
Surface modification of PBO fiber by electrostatic discharge for composites
Composites Surface treatment Surface free energy
2009/12/1
Purpose: PBO fibers provide great potential applications as reinforcement fibers for advanced composites due
to the excellent thermal resistance and specific stiffness and strength. However, the inte...
Butadiene-acrylonitrile elastomers as PVC modifiers
Engineering polymers PVC compouds Mechanical properties Window sealing
2009/12/1
Purpose: The purpose of the paper is to present the results of research programme on influence of acrylonitrilebutadiene
copolymers on plasticized polyvinylchloride compounds used as window gasket ma...
甲基丙烯酸酯/二甲基丙烯酸酯自由基共聚合体系中的自加速和凝胶行为
交联聚合 动力学 凝胶化
2009/11/25
对甲基丙烯酸聚乙二醇单醚酯/二甲基丙烯酸聚乙二醇酯共聚体系分别实施常规自由基聚合（FRP），原子转移自由基聚合（ATRP）和可逆加成-断裂链转移（RAFT）自由基聚合，通过观察聚合速率、双键转化率、凝胶点以及交联网络的发展，比较FRP、ATRP和RAFT共聚合体系的反应动力学和交联行为。3个聚合体系均出现了自加速现象，ATRP体系的自加速由扩散控制的自由基脱活造成，RAFT体系的自加速来自于扩散控...
Microstructural and thermal analysis of Cu-Ni-Sn-Zn alloys by means of SEM and DSC techniques
Cu-Ni-Sn-Zn alloys DSC technique Scanning electron microscopy
2010/8/16
Most Pb-free solders are Sn-based alloys with addition of low melting metals (such as Zn) or metals forming eutecticts or peritectics with Sn (such as Cu). Copper and nickel are common substrate mater...
Organic Light Emitting Diodes operation and application in displays
LED OLED Displays Organic materials Optoelectronics
2010/8/16
Organic materials are of great interest for electronics applications, as they have many advantages over their inorganic counterparts.They may often be solution-processed, allowing the fabrication of d...
磨碎玻璃纤维/聚氨酯/环氧灌封材料的形态结构与力学性能
磨碎玻璃纤维 聚氨酯 环氧树脂
2009/8/28
采用真空灌注工艺，制备磨碎玻璃纤维(MG)/聚氨酯(PU) /环氧(EP)灌封材料，并对其力学性能和微观结构进行研究。研究结果表明：随着PU含量的增加，PU/EP共混聚合物的拉伸和冲击强度呈先升后降的变化趋势。当PU含量为15%时，共混聚合物的综合力学性能最佳，拉伸强度为60.57 MPa，冲击强度为23.56 kJ/m2，与EP相比分别提高32.77%和115%。为进一步提高材料的强度，并保持良...
一维纳米材料中电子局域态分布
纳米材料 电子局域态 局域中心 晶界无序度
2009/8/26
从一维纳米随机链模型出发,在考虑近邻、次近邻相互作用的情况下,运用多对角全随机厄米矩阵求解方法计算了一维纳米材料的电子局域态中心位置。针对晶界无序度和晶粒大小,讨论了材料中的电子局域态分布。研究结果表明:局域态中心位置随能量的改变而改变,并且在不同的能量范围内局域态分布不同,在某些能量范围内,能量变化很小而局域位置变化很大,电子跳跃很容易发生,而在另一些能量范围内,能量变化很大但局域位置变化很小,...
离子液体除了是许多聚合物的良溶剂外，对聚合物的相转变也有一定的影响。综述了国内外关于离子液体对聚合物相转变影响的研究现状，包括玻璃化转变、结晶、凝胶等。离子液体对许多聚合物表现出增塑作用，显著降低了聚合物的玻璃化转变温度，甚至熔点。另外，离子液体能够促进蛋白质等聚合物结晶结构的形成。在离子液体作用下，聚甲基丙烯酸甲酯的立构混合物形成了可逆性热凝胶。
含氟半脂环透明聚酰亚胺薄膜的制备和性能
有机高分子材料 光通讯 聚酰亚胺
2009/6/4
分别将脂环族二酐单体1,2,3,4--环丁烷四酸二酐(CBDA, I)、1,2,4,5--环戊烷四酸二酐(CPDA, II) 和1,2,4,5--环己烷四酸二酐(CHDA, III)与芳香族含氟二胺1,4--双(4--胺基--2--三氟甲基苯氧基) 苯(6FAPB, a)和4,4´--双(4--胺基--2--三氟甲基苯氧基)联苯(6FBAB, b)反应制备两个系列的含氟半脂环族聚酰亚胺...