电绝缘涂料

用于挤出涂装和挤出层压件的高绝缘LDPE／乙烯-乙酸乙烯基酯共聚物和聚甲基戊烯混合物；含硅烷表面活性剂的成膜组合物及电子设备绝缘用笼状化合物聚合物；生产绝缘膜的涂料组合物、使用该涂料组合物制备绝缘膜的方法、由其得到的用于半导体器件的绝缘膜及含有该绝缘膜的半导体器件；荧光型防污闪涂料；[编者按]     

改性聚苯胺膜在CO_2/CH_4分离中的应用研究

合成了一种由N-乙基苯胺和苯胺共聚的高聚物,并制备了其4种掺杂态共聚物膜。实验中在不同压力、不同进料组成下测试了共聚物膜及聚砜膜对CO2/CH4混合气的分离性能。实验结果表明:掺杂态不同对气体的分离性能有很大影响,其中二次掺杂态的分离系数最高,可达70,而去掺杂态的渗透速率最高,CO2可达2.15 GPU[1 GPU=7.501×10-10cm3/(cm2.s.Pa)],CH4达到0.049 GPU,均高于聚砜膜和文献中报道的聚苯胺膜的值,这是由于N-乙基的引入,改变了聚合物链的柔韧性。     

PVDF中空纤维膜接触器分离烟气CO2

以水（H2O）、氢氧化钠（NaOH）、氨基乙酸钾（GLY）、氨基乙酸钾-哌嗪（GLY-PZ）水溶液为吸收剂,研究了疏水性聚偏氟乙烯（PVDF）中空纤维膜接触器分离CO2/N2模拟烟气中CO2的技术,具体考察了流动方式、气液流率、吸收液浓度和温度、原料气CO2浓度、填充密度等对膜接触器吸收效率的影响。结果表明,气液逆流的腔流程模式具有较高的分离效率。不同吸收剂的分离性能为：NaOH > GLY-PZ > GLY > H2O。温度对各种吸收剂的影响随其种类不同而有所差异。膜接触器对烟气CO2的分离效率随填充密度、吸收液浓度和流率的提高而增大,随气体流率及其中CO2浓度的增大而减小。     

马来酸酐三元共聚物的制备及其复合材料的介电性能研究

以马来酸酐、乙酸乙烯酯和丙烯酸为单体,采用沉淀聚合法合成马来酸酐-乙酸乙烯酯-丙烯酸三元共聚物。将共聚物与锆钛酸铅(PZT)粉末热压共混,制备出系列高介电性的陶瓷/聚合物复合材料。通过对PZT/聚合物复合材料进行介电性能分析,结果表明复合材料的介电常数随PZT含量的增加而增加,介电损耗随PZT含量增加而减少。与不含丙烯酸的马来酸酐-乙酸乙烯酯二元共聚物/PZT复合材料相比,介电常数提高1倍左右,表现出超高的介电性能。高含量马来酸酐三元共聚物的采用有利于提高复合材料的介电性能。     

乙烯-乙酸乙烯酯共聚物的组成及其作为仿生原油抗胶凝剂的研究

正一种适于降低石蜡质原油倾点的聚合物组合物,包括协同混合物,所述协同混合物包括至少两个乙烯-乙酸乙烯酯共聚物,所述乙烯-乙酸乙烯酯共聚物的平均分子量Mw低于130000道尔顿(通过GPC测量),乙酸乙烯酯单体的含量在15%～50%重     

某些形状记忆热收缩材料的研究进展

综述了交联聚乙烯、(乙烯/乙酸乙烯酯)共聚物、(乙烯/丙烯酸乙酯)共聚物、含氟聚合物、反式1,4-聚异戊二烯等具有形状记忆功能的热收缩材料的研究现状,分析了其形状记忆机理,介绍了这些热收缩材料在包装材料、电线电缆、电子器件和医疗器材等领域的应用。     

聚吡咙膜的气体透过性能及应用

论述新型芳族含氮杂环聚吡咙膜的气体透过性能和应用，并与聚酰亚胺(PI)膜的气体分离性能进行比较。揭示出聚吡咙膜的扩散系数与气体分子有效直径之间及溶解系数和临界温度之间呈直线关系，指出气体在聚吡咙膜中的透过主要受扩散因素控制。与类似结构的PI膜相比，聚吡咙膜具有更优异的氧氮分离性能、CO2/CH4分离性能和氢氮分离性能，其透过系数和选择分离系数均高于PI膜，是一类很有发展潜力的聚合物膜材料。     

三元共聚物防垢剂的合成与性能研究

以水为溶剂,过硫酸铵为引发剂,马来酸酐、乙酸乙烯酯和丙烯酸为原料,合成了三元共聚物防垢剂,并对其进行了性能评价。研究了三元共聚物的质量浓度、温度及体系pH值等条件对其防垢率的影响。结果表明,合成的马来酸酐/乙酸乙烯酯/丙烯酸三元共聚物防垢剂对碳酸钙的防垢效果较好。     

SiO2/APTES/Zn2 BDC2 DABCO复合膜的制备和性能研究

将含有氨基的硅烷偶联剂3-氨丙基三乙氧基硅烷(APTES)接枝在多孔SiO2片上,得到氨基活化的多孔SiO2基底SiO2/APTES.以氨基活化的多孔SiO2为基底制备大面积连续致密的无机膜三乙烯二胺对苯二酸合锌(Zn2 BDC2DABCO),即SiO2/APTES/Zn2BDC2DABCO复合膜.通过傅里叶红外光谱(FTIR)、X-射线衍射(XRD)、扫描电镜(SEM)、气体分离测试对得到的复合膜的化学结构、表面形貌和气体分离性能等进行了表征分析.结果表明:制备的复合膜具有与模拟的立方体结构具有一致的晶相,且无机膜连续致密,无缺陷;气体分离测试结果显示该无机膜对CO2具有很好的选择性,可以用来分离和回收CO2.     

含氟聚合物及其涂料

0301()l7用于对建筑材料疏水和疏油处理的氟化共聚物:w002一40 557[国际专利申请,法]/法国:Atofina(Juhue,Didier等)一2002.5.23一21页一2000八4723(2000.1 1 .15);IPC COSF22O/24 本发明涉及氟化共聚物【由聚氟化单体、(甲基)丙烯酸醋氨基醇、乙酸乙烯醋和硅烷单体于有机溶剂(可以被蒸馏)中聚合制得」、含该氟化共聚物的水性组合物.以及用该组合物处理固体底材(特别是建筑材料)的应用。一种典型的聚合物是由甲基丙烯酸2一(二甲氨基)乙基醋14.7份、乙酸乙烯醋7.8份、乙烯基三异丙氧基硅烷3.9份和CF;(CFZ)】ICZH4OCOCH:CHZ(n=5、…     

PVA/CuSO4·5H2O复合膜的制备及其结构与性能研究

采用溶液流延法制备了不同五水硫酸铜(CuSO4·5H2O)含量的聚乙烯醇(PVA)/CuSO4·5H2O复合膜,采用扫描电子显微镜(SEM)、热失重分析(TG)、X射线衍射(XRD)、力学性能测试和透气性能测试等方法研究了CuSO4·5H2O对PVA薄膜的结构与性能的影响。结果表明,所制得的复合膜透明性好,Cu2+可与PVA上—OH络合破坏PVA分子内和分子间的氢键作用, 降低PVA的结晶度;该复合膜具有比纯 PVA 膜更高的拉伸强度和更低的断裂伸长率,表明Cu2+交联可明显改善薄膜的力学性能;在75 %相对湿度下CuSO4·5H2O的引入能促进薄膜对CO2气体的透过作用,但对O2的透过系数基本没有影响。     

Comparison of gas permeation in vinyl and vinylidene polymers

The gas transport properties of several simple vinyl and vinylidene polymers are compared to examine the effect of pendant group type (H, CH₃, F, Cl) and symmetry of placement. The literature contains extensive information about these polymers, which has been critically reviewed to obtain consistent data for interpretation of the effect of structure on gas permeability. The gas transport data available for many of these polymers are quite variable because of differences in additives, thermal history, and crystallinity. The values used here are from studies where the physical properties of the film were reported along with the transport data. The appropriate data were not available for poly(vinyl fluoride) or poly(vinylidene chloride). For poly(vinyl fluoride), permeability measurements and thermal analysis were done to supply this information. Results for poly(vinylidene chloride) were obtained by extrapolation of copolymer permeation properties. Estimates of the permeability of oxygen in the amorphous phase of each polymer are discussed in terms of the estimated fractional free volume of that phase. In this way, the intrinsic effects of molecular structure on gas permeation exclusive of crystallinity effects have been evaluated.     

Miscibility of poly(vinyl chloride) with ethylene-ethyl acrylate-carbon monoxide terpolyrners

Ethylene/ethyl acrylate/carbon monoxide ter polymers (E/ EA/CO) can exhibit a very high degree of miscibility with poly(vinyl chloride) as determined from dynamic mechanical measurements. The blends yield transparent films and show a large amorphous phase which exhibits only one major glass transition. However, some crystallinity can be detected and has been measured by differential, scanning calorimetry. Residual crystallinity is at least partially due to the somewhat non-uniform nature of the terpolymerization. The acrylate monomer exhibits faster polymerization rates than the other two constituents. By contrast, ethylene/ethyl acrylat copolymers are not miscible with poly(vinyl chloride). The addition of carbon monoxide to the termpolymer structure is believed to yield miscibility with poly(vinyl chloride) via specific interaction of the ketone carbonyl of the terpolymer (proton acceptor) and the tertiary hydrogen of poly(vinyl chloride) (proton donor). This specific interaction allows for a broad range of terpolymer compositions which retain miscibility with polyvinyl chloride. Similar results are also observed with ethylene/vinyl acetate/carbon monoxide (E/VA/CO) as well as ethylene/2-ethylhexyl acrylate/carbon monoxide termpojymers. The vinyl acetate terpolymers (and their blends) display a lower degree of crystallinity than the E/EA/ CO. This is consistent with the more uniform nature of the E/VAJCO terpolymerization.     

Crosslinking of pressure sensitive adhesive based on water‐borne acrylate

This publication shows how the kind of crosslinking agents and their contents influence important properties of acrylic based pressure‐sensitive adhesive (PSA) dispersions such as tack, adhesion and cohesion. Synthesized PSAs based on acrylic polymers, containing 2‐ethylhexyl acrylate, butyl acrylate, vinyl acetate, styrene and acrylic acid are used in the preparation of self‐adhesive dispersions used as coating of polyethylene foams and poly(vinyl chloride) and polyester foils. © 2003 Society of Chemical Industry     

Water-stable ZIF-300/Ultrason(R) mixed-matrix membranes for selective CO2 capture from humid post combustion flue gas

Water stable mixed-matrix membranes (MMMs) were developed to help control the global warming by capturing and sequestrating carbon dioxide (CO2) from post-combustion flue gas originated from burning of fossil fuels.MMMs of different compositions were prepared by doping glassy polymer Ultrason(R) S 6010 (US) with nanocrystals of zeolitic imidazolate frameworks (ZIF-300) in varying degrees.Solution-casting technique was used to fabricate various MMMs to optimize their CO2 capturing performance from both dry and wet gases.The prepared composite membranes indicated enhanced filler-polymer interfacial adhesion,consistent distribution of nanofiller,and thermally established matrix configuration.CO2 permeability of the membranes was enhanced as demonstrated by gas sorption and permeation experiments performed under both dry and wet conditions.As compared to neat Ultrason(R) membrane,CO2 permeability of the composite membrane doped with 40 wt％ ZIF-300 nanocrystals was increased by four times without disturbing CO2/N2 ideal selectivity.In contrast to majority of previously reported membranes,key features of the fabricated MMMs include their structural stability under humid conditions coupled with better and unaffected gas separation performance.     

Statistical studies of branched ester latex and paint properties

Vinyl versatate, butyl acrylate and 2-ethylhexyl acrylate were compared as comonomer, for colloid-stabilized vinyl acetate latex polymers to assess their impact on latex coating properties. Vinyl versatate afforded advantages in scrub resistance, gloss, hydrophobicity and higher glass transition temperatures. Butyl acrylate developed better wet adhesion efficiency, gel content and hiding efficiency. 2-Ethylhexyl acrylate offered performance comparable to butyl acrylate in hiding efficiency, lowering copolymer glass transition temperatures, and gloss development. Combinations of these monomers, in many instances, afforded a better balance of performance properties than individual monomers alone. In the subject study, a simplex-centroid design was utilized to statistically map polymer compositions for determining the effect of comonomer composition on latex and paint film properties. In addition to developing contour maps of polymer and paint properties as a function of composition, a technique for studying structure-property relationships is presented.     

Development of CO2-Philic Blended Membranes Using PIM–PI and PIM–PEG/PPG

Blending is a simple method through which one can effectively tailor new polymers exhibiting the properties of their parent ones. Because the original properties of polymers are maintained after blending, various studies have used these films as gas separation membranes. In this study, a new CO₂ separation membrane is developed by physically mixing a polymer of intrinsic microporosity (PIM) with high gas permeability, polyimide (PIM-PI), as the hard segment and CO₂-philic PIM-poly(ethylene glycol)/poly(propylene glycol), or PIM-PEG/PPG, as the soft segment. Prepared by adding 5 mol.% of PIM-PEG/PPG to PIM-PI, the blended membrane PPB-5, with a tensile strength of 54 MPa and 35.5% elongation at break, shows better mechanical properties than commercial high-performance polymer membranes developed for gas separation, PEG-based blended membranes, and corresponding copolymer membranes with similar compositions developed in a previous study. In addition, it shows high CO₂ permeability (1552.6 Barrer) and CO₂/N₂ selectivity (29.3) due to the well-developed microphase separation characteristics originating from the optimal two-component composition, and the gas separation performance is close to the Robeson (2008) upper bound.     

含开放金属位点MIL-101(Cr)掺杂的混合基质膜制备及其CO2分离性能

以结构中含有开放金属位点的MIL-101（Cr）作为填料与3种不同的聚合物复合制备了混合基质膜,从填料结构、聚合物性质及填料-聚合物界面状况等角度对混合基质膜的CO₂分离性能进行了分析。结果表明,由于MIL-101（Cr）较大的孔道尺寸以及结构中开放金属Cr（Ⅲ）位点与CO₂分子间的Lewis酸碱作用,其掺杂能够同时显著提高PSF膜的CO₂通量及分离因子。而当聚合物渗透性及选择性较高时,MIL-101（Cr）的掺杂仅提高了气体通量,CO₂分离因子则略有降低。当聚合物分子链柔性较大时,MIL-101（Cr）的表面孔道会被分子链堵塞,造成混合基质膜气体通量的显著下降。     

热致相分离法制备聚(偏氟乙烯-六氟丙烯)/离子液体凝胶膜及 气体渗透性能

采用热致相分离（TIPS）法制备p(VDF-HFP)/[BMIM]PF6凝胶膜,对该膜的内部结构及机械性能进行表征,探讨了[BMIM]PF6添加量对凝胶膜的CO2/N2渗透性能影响。结果表明：随着[BMIM]PF6添加量的增加,p(VDF-HFP)/[BMIM]PF6体系的凝胶温度逐渐降低,凝胶膜的聚合物骨架结构由致密变成疏松的球晶结构;同时[BMIM]PF6的添加降低了凝胶膜的结晶度,改善了p(VDF-HFP)链段的柔韧性,因而膜的CO2和N2渗透系数显著增加,CO2/N2渗透选择性则先升高后降低;凝胶膜受扩散过程控制,当[BMIM]PF6添加量（质量分数）由0增加到60%时,凝胶膜的CO2渗透性系数从0.2 Barrer增加到94.3 Barrer。     

Preparation and gas permeability of polymer blend membranes of polystyrene and poly[1,1,1-tris(trimethylsiloxy)methacrylate propylsilane]

The gas permeability of O₂ and CO₂ was sutidied for various polymer blend membranes of polystyrene (PSt) and poly[1,1,1-tris(trimethylsiloxy)methacrylate propylsilane (PTMPS). In order to improve the compatibility of these polymer blends, the effect of addition of the graft copolymer was also investigated. The gas permeability of various composition polymer-blend membranes increases rapidly with an increasing content of PTMPS in the polymer blend. In the polymer blend membranes containing the graft copolymer, the gas permeability decreases with an increase in the graft copolymer content and then reaches a nearly constant value, when the PTMPS content remains constant. This result is attributed to a decrease in interstices at phase boundaries, owing to improvement in compatibility of the component polymers. This method of membrane preparation is very useful for making membranes with required properties.