熔融温度对PPS／PEEK中PPS的结晶熔融行为的影响

用粉末干混法制备结晶／结晶共混体系ＰＰＳ／ＰＥＥＫ，并用ＤＳＣ研究了不同熔融温度下淬火ＰＰＳ及ＰＰＳ／ＰＥＥＫ共混物中ＰＰＳ的结晶熔融行为。熔融温度（Ｔｍｅｌｔ）高于３６０℃时，对ＰＰＳ的结晶熔融行为有影响，结晶温宽（ΔＴｃ）随Ｔｍｅｌｔ提高而加宽；ＰＥＥＫ加入ＰＥＥＫ含量增加，使ＰＰＳ的结晶、熔融温度下降。共混物中的ＰＰＳ的结晶熔融行为受Ｔｍｅｌｔ影响更大。     

原位增容HAPE／PET共混体系结构与性能的研究

采用ＤＳＣ、ＷＡＸＤ、ＳＥＭ及ＴＧＡ研究了ＨＤＰＥ－ＰＥＴ共混体系在增容剂ＥＶＡＳ及ＥＡＡ作用下的结晶性,继口的形态结构及热稳定性。结果表明,ＥＶＡ及ＥＡＡ的加入使ＨＤＰＥ－ＰＥＴ体系中ＨＤＰＥ组分的熔融热焓降低,结晶度下降,但熔融峰位置和晶胞结构基本保持不变;从扫描电镜照片可以观察到ＥＶＡ及ＥＡＡ对共混体系具有一定的增容作用,且ＥＡＡ的效果优于ＥＶＡ;共混体系的热稳定性随ＥＶＡ及ＥＡＡ的加入有所     

CPE增容PVC／SBS共混体系的研究

通过冲击试验，应力－应变试验，动态力学分析（ＤＭＡ），扫描电镜（ＳＥＭ）及光学显微镜观察，研究了ＣＰＥ增容的ＰＶＣ／ＣＰＥ－ＳＢＳ共混物的性能与形态结构之间的关系。实验结果表明，ＣＰＥ对ＰＶＣ与ＳＢＳ共混体系有很好的增容作用，ＣＰＥ与ＳＢＳ在一定组成范围内对ＰＶＣ增韧具有协同效应，大幅度地提高共混物的抗冲击性能，尤其是对星型ＳＢＳ体系更加显著。     

TEOS-PEG无机-有机杂化复合材料的研究

阐述了溶胶凝胶法合成ＴＥＯＳＰＥＧ（正硅酸乙酯聚乙二醇）无机有机杂化复合材料的基本原理,且成功地合成出该材料,同时进行了红外表征及热分析,探索了ＴＥＯＳＰＥＧ凝胶比表面积、折射率及结构的影响因素。ＴＥＯＳＰＥＧ无机有机杂化复合材料具有优良的物化性能及光学性能,可广泛用作各种特殊用途的光学元件。     

嵌段共聚物对PPO／PP共混物的增容作用

研究表明苯乙烯－乙烯／丙烯嵌段共聚物及其混合顺序对聚／聚丙烯共混物形态和性能有一定影响。ＰＰＯ／ＰＰ共混物加入增容剂后，分散相颗粒变得精细均匀，缺口冲击强度大大提高。文中计算了ＳＥＰ／ＰＰＯ及ＳＥＰ／ＰＰ共混物的相互作用能密度Ｂ，计算表明，ＥＰ体积分数高的ＳＥＰ和ＰＰＯ的亲和力比ＳＥＰ与ＰＰ的亲和力小，因此当ＳＥＰ先与ＰＰＯ预混合，然后与ＰＰ混合，ＳＥＰ易于迁移到两相界面，降低了界面张力，减小了分     

TEOS—PEG无机—有机杂化复合材料的研究

阐述了溶胶－凝胶法合成ＴＥＯＳ－ＰＥＧ无机－有机杂化复合材料的基本原理,且成功地合成出该材料,同时材料了红有征及热分析,探索了ＴＥＯＳ－ＰＥＧ凝胶比表面积、折射率及结构的影响因素,ＴＥＯＳ－ＰＥＧ无机－有机杂化复合材料具有优良的物化性能及光学性能,可广泛用作各种特殊用途的光学元件。     

RPS/PE反应性共混研究

用ＩＲ、ＤＳＣ、ＧＰＣ研究了侧基含有过氧键的活性聚苯乙烯与聚乙烯之间的反频，用ＳＥＭ观察了共混物的断面形态。结果表明，ＲＰＳ／ＰＥ共混反应中生成ＰＳ－ｇ－ＰＥ，对ＰＥ／ＰＳ共混物具有增容作用，提高了共混物的力学性能。     

热孔法表征特种高分子合金超滤膜的孔径

用热分析方法（ＤＳＣ）对磺化聚砜（ＳＰＳＦ）与聚醚酮（ＰＥＫ）高分子合金超滤膜的孔径和孔结构进行了研究。由实验得到热谱图，经计算得到不同合金比（ＳＰＳＦ／ＰＥＫ）的超滤膜孔径及孔径体积分布。研究结果表明，在一定条件下，ＳＰＳＦ／ＰＥＫ以不同的比例混合时，其膜的孔径分布范围在５￣１５ｎｍ，平均孔径在６￣９ｎｍ之间；当合金比（ＳＰＳＦ／ＰＥＫ）等于或大于４：６时，所制得的超滤膜对聚乙二醇（ＰＥＧ，Ｍｗ     

FPE／CPE／PVC体系的界面粘结力、形态结构与性能的关系

用ＦＴ－ＩＲ光谱证实发了ＰＶＣ与ＦＥ-g-DBM(下称ＦＰＥ,用固相接枝法自制的固接枝物）之间存在着氢键和偶极－偶极的作用,其中以氢键作用为主。测定了ＰＶＣ／ＣＰＥ／ＰＥ和ＰＶＣ／ＣＰＥ／ＦＰＥ合金的力学性能,用ＤＳＣ、相衬显微镜及ＳＥＭ表征了这两个体系的形态结构、研究了共混物中界面粘结力与与形态结构、合金性能的相互关系。     

SRS 3D家庭音效处理器

ＳＲＳ３Ｄ家庭音效处理器田卫ＳＲＳ３Ｄ系统原理本文向大家介绍一款新颖的ＳＵＰＥＲＨＳＥＰ－Ａ型ＳＲＳ３Ｄ家庭音效处理器。ＨＳＥＰ是英文ＨＯＭＥＳＯＵＮＤＥＦＴＴＥＣＴＰＲＯＣＥＳＳＯＲ（家庭音效处理器）的缩写。ＨＳＥＰ具有系统成本低、环绕效果明显、功...     

固体高聚物电解质研究进展

介绍了固体高聚物电解质（Solid Polymer Electrolytes,简称SPE）的研究进展，主要涉及固体高聚物电解质的发展状况，研究热点，性能改善的几点方法等。同时，对SPE未来的研究进行了展望。     

固相萃取富集—高效液相色谱法分析水中多环芳烃(PAHs)

采用固相萃取与高效液相色谱联用技术,测定了水中的多环芳烃。实验中使用Supelco固相萃取过滤装置和Supelco C_(18)固相萃取小柱,100％的甲醇作为流动相。对于萤蒽(FLU),苯并(b)萤蒽(BbF),苯并(K)萤蒽(BkF),苯并(ghi)(BPer)及茚并(1,2,3-cd)芘(IP)的检测限分别为4.1,3.8,1.6,14.4,和3.8ng/L。     

丙烯腈类聚合物基固体电解质材料的研究进展

综述了以丙烯腈类聚合物为基体材料的固体电解质的特性和研究进展,对丙烯腈类聚合物用作固体电解质基体材料的研究前景作了展望.     

地表水中有机磷农残测定的前处理方法比较

分别采用液液萃取法和固相萃取法提取地表水样品中的有机磷农药残留。液液萃取法的方法检出限为0.05~0.2 ng/mL,加标回收率为86%~103%,相对标准偏差为2%~7%;固相萃取法的方法检出限为0.03~0.05 ng/mL,加标回收率为49%~118%,相对标准偏差为5%~18%。液液萃取法处理不同类型基体水样的测试稳定性较好,固相萃取法则对于洁净环境水体中痕量有机磷农药残留的富集更为适用。     

PEO基固态聚合物电解质膜的静电纺丝制备及性能EI北大核心CSCD

PEO基固态聚合物电解质被认为是目前固态锂电池领域极具产业化前景的固态电解质。为适应工业化生产,采用静电纺丝技术制备PEO/LiClO_(4)固态聚合物电解质(SPE),研究纺丝电压、纺丝液质量浓度和锂盐含量对SPE纤维膜形貌和直径的影响。通过扫描电子显微镜观察SPE中纤维的形貌,利用Image J软件分析SPE纤维的直径。通过DSC,XRD,FTIR-ATR和拉伸测试等手段对静电纺丝制备的SPE纤维膜的组成、结构、性能等进行研究。结果表明:当纺丝电压为15 kV、PEO/LiClO_(4)纺丝液质量浓度为6%、[EO]∶[Li^(+)]=10∶1(摩尔比)时,静电纺丝方法制备的PEO/LiClO_(4) SPE纤维膜具有较好的纤维形貌,平均直径为557 nm,分布均一;当[EO]∶[Li^(+)]=10∶1时,SPE纤维膜中PEO的熔点仅为53.8℃,结晶度低至18.9%;电解质在30℃时的离子电导率达到5.16×10^(-5)S·cm^(-1),同时具备良好的电化学稳定性和界面稳定性。     

高分子固体电解质(SPE)的研究进展

高分子固体电解质（ＳＰＥ）由于具有质轻、易成膜等特点，具有巨大的潜在应用价值，近年来得到了很大的发展。主要综述了各类高分子固体电解质的有关实验性研究工作，并简要地探讨了有关ＳＰＥ今后的研究工作。     

固相萃取-气相色谱法测定葡萄酒中16种有机磷农药残留

利用固相萃取(SPE)/气相色谱火焰光度(GC-FPD)技术建立了葡萄酒中16种有机磷农药残留量分析方法。样品加水稀释,过HLB小柱和LC-NH2小柱净化,浓缩、定容后,用气相色谱测定,外标法定量。各农药的方法定量限(LOQ)均为为0.01 mg/kg。添加回收实验,16种有机磷农药添加浓度为0.01-0.10 mg/kg时,添加回收率为65.3-92.3%,变异系数≤10%。     

Thiol-Branched Solid Polymer Electrolyte Featuring High Strength,Toughness, and Lithium Ionic Conductivity for Lithium-Metal Batteries

Lithium-metal batteries (LMBs) with high energy densities are highly desirable for energy storage, but generally suffer from dendrite growth and side reactions in liquid electrolytes; thus the need for solid electrolytes with high mechanical strength, ionic conductivity, and compatible interface arises. Herein, a thiol-branched solid polymer electrolyte (SPE) is introduced featuring high Li⁺ conductivity (2.26 × 10⁻⁴ S cm⁻¹ at room temperature) and good mechanical strength (9.4 MPa)/toughness (≈500%), thus unblocking the tradeoff between ionic conductivity and mechanical robustness in polymer electrolytes. The SPE (denoted as M-S-PEGDA) is fabricated by covalently cross-linking metal–organic frameworks (MOFs), tetrakis (3-mercaptopropionic acid) pentaerythritol (PETMP), and poly(ethylene glycol) diacrylate (PEGDA) via multiple C S C bonds. The SPE also exhibits a high electrochemical window (>5.4 V), low interfacial impedance (<550 Ω), and impressive Li⁺ transference number (t_Li+ = 0.44). As a result, Li||Li symmetrical cells with the thiol-branched SPE displayed a high stability in a >1300 h cycling test. Moreover, a Li|M-S-PEGDA|LiFePO₄ full cell demonstrates discharge capacity of 143.7 mAh g⁻¹ and maintains 85.6% after 500 cycles at 0.5 C, displaying one of the most outstanding performances for SPEs to date.     

Solid/Solid Interfacial Architecturing of Solid Polymer Electrolyte–Based All‐Solid‐State Lithium–Sulfur Batteries by Atomic Layer Deposition

Solid polymer electrolytes (SPEs)‐based all‐solid‐state lithium–sulfur batteries (ASSLSBs) have attracted extensive research attention due to their high energy density and safe operation, which provide potential solutions to the increasing need for harnessing higher energy densities. There is little progress made, however, in the development of ASSLSBs to improve simultaneously energy density and long‐term cycling life, mostly due to the “shuttle effect” of lithium polysulfide intermediates in the SPEs and the low interfacial compatibility between the metal lithium anode and the SPE. In this work, the issues of solid/solid interfacial architecturing through atomic layer deposition of Al₂O₃ on poly(ethylene oxide)‐lithium bis(trifluoromethanesulfonyl)imide SPE surface are effectively addressed. The Al₂O₃ coating promotes the suppression of lithium dendrite formation for over 500 h. ASSLSBs fabricated with two layers of Al₂O₃‐coated SPE deliver high gravimetric/areal capacity and Coulombic efficiency, as well as excellent cycling stability and extremely low self‐discharge rate. This work provides not only a simple and effective approach to boost the electrochemical performances of SPE‐based ASSLSBs, but also enriches the fundamental understanding regarding the underlying mechanism responsible for their performance.     

Development of an Electrophoretic Deposition Method for the In Situ Fabrication of Ultra-Thin Composite-Polymer Electrolytes for Solid-State Lithium-Metal Batteries

All-solid-state lithium-metal batteries offer higher energy density and safety than lithium-ion batteries, but their practical applications have been pushed back by the sluggish Li⁺ transport, unstable electrolyte/electrode interface, and/or difficult processing of their solid-state electrolytes. Li⁺-conducting composite polymer electrolytes (CPEs) consisting of sub-micron particles of an oxide solid-state electrolyte (OSSE) dispersed in a solid, flexible polymer electrolyte (SPE) have shown promises to alleviate the low Li⁺ conductivity of SPE, and the high rigidity and large interfacial impedance of OSSEs. Solution casting has been by far the most widely used procedure for the preparation of CPEs in research laboratories; however, this method imposes several drawbacks including particle aggregation and settlement during a long-term solvent evaporation step, excessive use of organic solvents, slow production time, and mechanical issues associated with handling of ultra-thin films of CPEs (<50 µm). To address these challenges, an electrophoretic deposition (EPD) method is developed to in situ deposit ultra-thin CPEs on lithium-iron-phosphate (LFP) cathodes within just a few minutes. EPD-prepared CPEs have shown better electrochemical performance in the lithium-metal battery than those CPEs prepared by solution casting due to a better dispersion of OSSE within the SPE matrix and improved CPE contact with LFP cathodes.