欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
通过控制2个组分的序列长度，制备了pPDA（对苯二胺）／ODA（4，4＇-二氨基二苯醚）-PMDA（均苯四羧酸二酐）嵌段共聚酰亚胺（b—PI）．采用偏光显微镜（PLM）、广角X射线衍射（WAXD）、透射电子显微镜（TEM）和力学性能测试研究了b—PI薄膜的聚集态结构．结果表明，所有b—PI薄膜均可结晶，生成微晶或不完善的小球晶．刚性棒状的pPDA—PMDA分子链段发生相分离，形成晶核，半刚性的ODA—PMDA分子链以pPDA—PMDA为晶核进行晶粒生长．在结晶过程中，晶核数目取决于pPDA／ODA比值及pPDA—PMDA（PP）链段长度，而晶粒尺寸依赖于ODA—PMDA链段（PO）的运动能力．通过调节二元胺的比例及2个嵌段组分的序列长度，可以对薄膜的聚集态结构实现可控制备，从而达到对性能的控制．
英文摘要：
pPDA/ODA-PMDA block copolymers （b-PIs） with different segment length of two components were prepared. Morphology and properties of their films were investigated by polarizingmicroscope （ PLM）, wide-angle X-ray diffraction （ WAXD ）, transmission electron microscope （ TEM ） and tensil test. Measured results show all films of b-PI are crystalline. At first, phase separation of rigid segment of pPDA-PMDA takes place, forming nuclei. Then, semi-rigid segment of ODA-PMDA grows around the nuclei and forms small and imperfection grains. The number of nuclei is dependent of the ratio between pPDA and ODA and segment length of pPDA-PMDA（ PP）, while the size of grains is depended on the movability of ODA-PMDA（PO） segment. Morphology and properties of films can be controlled by changing the ratio of dianmines and segment length of two components.
同期刊论文项目
同项目期刊论文
Preparation of PVDF/PMMA blend microporous membranes for lithium ion batteries via thermally induced
Preparation and properties of gel membrane containing porous PVDF-HFP matrix and cross-linked PEG fo
Preparation of PVDF/PEO-PPO-PEO blend microporous membranes for lithiumion batteries via thermally i
Fabrication?and?characterization?of?a?novel?TiO2?nanoparticle?self-assembly?membrane?with?improved?f
Preparation and characterization of PVDF-HFP microporous flat membranes by supercritical CO2 induced
Porous membranes modified by hyperbranched polymers 1. Preparation and characterization of PVDF memb
Improving hydrophilicity and protein resistance of PVDF membrane by blending with amphiphilic hyperb
Effect of the casting solvent on the crystal characteristics and pervaporative separation performanc
PVDF porous matrix with controlled microstructure prepared by TIPS process as polymer electrolyte fo
Study on the relationship of chemical structure and order aggregation ability of polyimides: A molec
Polymorphism in porous poly(vinylidene fluoride) membranes formed via immersion precipitation proces
Synthesis, characterization, and crystallization of thermoplastic aromatic semi-crystalline homopoly
Structure and ionic conductivity of porous polymer electrolytes based on PVDF-HFP copolymer membrane
Synthesis and Characterization of Novel Polyimides with Aromatic Ester Side Chain End-Capped by Meth
Improving the hydrophilicity of poly(vinylidene fluoride) porous membranes by electron beam initiate
The effects of quenching on the phase structure of vinylidene fluoride segments in PVDF-HFP copolyme
Grafting of styrene/maleic anhydride copolymer onto PVDF membrane by supercritical carbon dioxide: p
Porous membranes modified by hyperbranched polymers 2.effect of the arm length of amphiphilic hyperb
Structure Formation and Characterization of PVDF Hollow Fiber Membranes by Melt-Spinning and Stretch
Stretching Induced Steric Interaction between Backbone and Side chain in a Novel Polyimide Fiber Con
Effects of Catalyst Isoquinoline in Polymerization Process on the Aggregation Structures of Polyimid
A Novel Aromatic Polyimide with Rigid Biphenyl Side-groups: Formation and Evolution of Structures in
Preparation of PVDF porous membrane via thermally induced phase separation with diluent mixture of D
Effect of chemical interaction on morphology and mechanical properties of CPI-OH/SiO2 hybrid films w
Comparative study on morphology and properties of polyimide/silica hybrid films derived from differe
The Study on imidization degree of polyamic acid in solution and ordering degree of its polyimide fi
P(VDF-co-HFP) membrane for recovery of aroma compounds from aqueous solutions by pervaporation (. Et
A?facile?method?of?surface?modification?for?hydrophobic?polymer?membranes?based?on?the?adhesive?beha
Effect?of?Side?Chain?Structure?of?Polyimide?on?Pretilt?Angle?of?LiquidCrystal?Cell:?Experimental?and
Nonisothermal crystallization kinetics of poly(vinylidenefluoride) in a poly(vinylidene fluoride)/di
Structure formation and characterization of PVDF hollow fiber membrane prepared via TIPS with diluen
Preparation of poly(vinylidene fluoride) hollow fiber membrane via thermally induced phase separatio
Surface immobilization of polymer brushes onto porous poly(vinylidene fluoride) membrane by electron
Synthesis of novel polyimides with (tert-butyldimethylsiloxy)biphenyloxy
groups and the effect of si
Influence of alcohol-based nonsolvents on the formation and morphology of PVDF membranes in phase in
Synthesis of an Amphiphilic Glucose-Carrying Graft Copolymer and Its Use for Membrane Surface Modifi
Introduction of side chains containing biphenyl unit on the crystalline morphology and properties of
Novel aromatic polyimide fiber with biphenyl side-groups: Dope synthesis and filament internal morph
期刊信息
位置：