摘要：Three "double-cable" conjugated polymers with thienopyrroledione-based backbone and perylene bisimide as side units were designed as electron acceptor for polymer-polymer solar cells. The polymers show broad absorption spectra and low-lying frontier energy levels due to both aromatic backbone and side units. The new double-cable polymers can be used as electron acceptor to combine with several electron donors, in which power conversion efficiencies above 3% could be achieved.

摘要：Chirality is a unique phenomenon in nature. Chiral interactions play an important role in biological and physiological process- es, which provides much inspiration for scientists to develop cbiral materials. As a breakthrough from traditional materials, bi- ointerface materials based on chiral polymers have attracted increasing interest over the past few years. Such materials ele- gantly combine the advantages of chiral surfaces and traditional polymers, and provide a novel solution not only for the inves- tigation of chiral interaction mechanisms but also for the design of biomaterials with diverse applications, such as in tissue en- gineering and biocompatible materials, bioregulation, chiral separation and chiral sensors. Herein, we summarize recent ad- vances in the study of chiral effects and applications of chiral polymer-based biointerface materials, and also present some challenges and perspectives.

摘要：The inte rmixed phase is important in effective charge separation due to the formation of cascaded energy landscape between intermixed phase and pure phases in polymer/fullerene solar ***,the quantitative relationship between the charge separation and the content of intermixed phase has not been investigated clearly so ***,we proposed to tune the content of the polymer/PC71BM intermixed phase by cha nging the polymer solution conformatio ***[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene](PBTTT)and PC71 BM was selected as a model *** organization of the PBTTT in solution promotes the formation of ordered aggregates as aging time increases,the interdigitation of side-chains restricts the intercalation of PC71 ***,the intermixed phase formed by intercalation PC71 BM to PBTTT side chain can be *** the aging time increasing from 0 to 80 min,the extent of inte rcalation gradually from almost complete intercalated phase to almost *** the content of intercalated phase is about 11%,the charge dissociation is most efficie nt and short circuit current(Jsc)increased from 1.60 mA/cm2 to 4.94 mA/cm2,leading to optimized device performance.

摘要：In this paper, based on the principle of Arrayed Waveguide Grating (AWG)theory, some important parameters are optimized for polymer AWG around the central wavelength of1.55μm with the wavelength spacing of 1.6 nm. Then, a 9 X 9 polymer AWG is designed and thefabricating process are described . The cladding material is poly-methyl-methacrylate-co-glyciclylmethacrylate (PMMA-GMA) and the core material is the mixture of PMMA-GMA and bis-phonel-A epoxy. Inorder to obtain a better shape of the waveguide after the Reactive Ion Etching (RIE) using oxygen,an aluminum mask is used on polymer instead of conventional photoresist as mask in the fabricationprocess. The measuring results indicate that the fabricated optical waveguide achieves single-modetransmission.

摘要：以混凝土砌体墙爆炸试验为基础,借助LS-DYNA软件,分析混凝土砌体墙在爆炸荷载作用下的破坏机理及polymer Sheet膜材加固后的防护性能。研究结果表明:爆炸荷载作用下,墙体背爆面跨中位置、迎爆面上下端部为危险截面,最易破坏;爆炸荷载的峰值压力不超过0.385 MPa时,砌块之间脱离和飞溅较少,可不进行防护;当峰值压力大于0.385 MPa时,随峰值压力增大,破坏部位脱离的砌块数量增多,飞溅速度加快,对建筑物内部人员及设施威胁增大,必须进行防护加固;峰值压力不超过0.95 MPa时,膜材能够很大程度上发挥防护作用,阻挡散落砌块的抛射;当峰值压力大于0.95 MPa时,膜材自身在锚固处断裂,墙体与断裂的防护膜以整体形式向建筑内部抛射,建议此时采用索膜防护体系,以提高防护效果;最后给出了polymer Sheet膜材加固的砌体墙安全防护距离,以供设计参考。

摘要：New and high transparent structural element, steel-glass composite beam was developed in respect to fabrication, static-structural and architectural criteria and consists of steel flanges and glass web assembled together by semi-rigid polymer adhesive, which is the key element of whole composite system. These beams can be used mainly as members of high transparent roof or floor structure as well as stiffening fins for large area glass facades. This paper deals with experimental research performed at CTU （Czech Technical University） Prague, which started by adhesive selection and initial material tests by ISO527, continued via small-scale steel-glass connection tests and graduated by full-scale tests of hybrid beams with the span of 4 m. Generalized results of these experiments, analytical and numerical studies serve as device, how to accurately predict the behavior of the beam, describe the stress distribution along the cross section and safely and economically design such a kind of structure with semi-rigid shear connection, made by polymer adhesive.

摘要：Designing of high electrochemical performance organic electrode materials has attracted tremendous attention. Recent investigations revealed that quinone-based polymers along with the stable thioether bonds could achieve a high specific capacity and a good cycling stability simultaneously. In this study, we synthesized a novel ladder-structured polymer poly(2,3-dithiino-1,4- benzoquinone)(PDB) through a simple two-step polymerization. The electrochemical performance indicated that PDB could achieve a high reversible specific capacity of 681 m Ah g-1 with 98.4% capacity retention after 100 cycles. A good rate performance was also achieved with a fast recovery of the capacity after testing at different current densities. Ultra-long cycling performance of PDB was also investigated. The promising results of PDB provided us more confidence to continue searching for high performance polymers through the modification of organic structures.

摘要：Transdermal drug delivery systems have overcome many limitations of other drug administration routes,such as injection pain and first-pass metabolism following oral route,although transdermal drug delivery systems are limited to drugs with low molecular ***,new emerging technology allowing high molecular weight drug delivery across the skin—known as‘microneedles’—has been developed,which creates microchannels that facilitate drug *** this report,drug-loaded degradable conic microneedles are modeled to characterize the degradation rate and drug release *** a lot of data are available for polylactic acid-co-glycolic acid(PLGA)degradation in the literature,PLGA of various molecular weights-as a biodegradable polymer in the polyester family-is used for modeling and verification of the drug delivery in *** main reaction occurring during polyester degradation is hydrolysis of steric bonds,leading to molecular weight *** acid produced in the degradation has a catalytic effect on the *** in water,acid and steric bond concentrations over time and for different radii of microneedles are *** solve the partial and ordinary differential equations simultaneously,finite difference and Runge–Kutta methods are employed,respectively,with the aid of *** of the polymer degradation rate with its molecular weight and molecular weight changes versus time are ***,drug diffusivity is related to matrix molecular *** molecular weight reduction and accumulative drug release within the system are *** order to validate and assess the proposed model,data series of the hydrolytic degradation of aspirin(180.16 Da)-and albumin(66,000 Da)-loaded PLGA(1:1 molar ratio)are used for *** proposed model is in good agreement with experimental data from the *** diffusion as themain phenomena and autocatalytic effects in the reaction,the drug release profile i

摘要：Synthetic dry adhesives inspired by the nano-and micro-scale hairs found on the feet of geckos and some spiders have beendeveloped for almost a decade. Elastomeric single level micro-scale mushroom shaped fibres are currently able to function evenbetter than natural dry adhesives on smooth surfaces under normal loading. However, the adhesion of these single level syntheticdry adhesives on rough surfaces is still not optimal because of the reduced contact surface area. In nature, contact area ismaximized by hierarchically structuring different scales of fibres capable of conforming surface roughness. In this paper, weadapt the nature’s solution arid propose a novel dual-level hierarchical adhesive design using Polydimethylsiloxane (PDMS),which is tested under peel loading at different orientations. A negative macro-scale mold is manufactured by using a laser cutterto define holes in a Poly(methyl methacrylate) (PMMA) plate. After casting PDMS macro-scale fibres by using the obtainedPMMA mold, a previously prepared micro-fibre adhesive is bonded to the macro-scale fibre substrate. Once the bondingpolymer is cured, the micro-fibre adhesive is cut to form macro scale mushroom caps. Each macro-fibre of the resulting hierarchicaladhesive is able to conform to loads applied in different directions. The dual-level structure enhances the peel strengthon smooth surfaces compared to a single-level dry adhesive, but also weakens the shear strength of the adhesive for a given areain contact. The adhesive appears to be very performance sensitive to the specific size of the fibre tips, and experiments indicatethat designing hierarchical structures is not as simple as placing multiple scales of fibres on top of one another, but can requiresignificant design optimization to enhance the contact mechanics and adhesion strength.

摘要：Five polymer bonded explosives(PBXs)with the base explosive epsilon-CL-20(hexanitrohexaazaisowurtzi-tane),the most important high energy density compound(HEDC),and five polymer binders(Estane 5703,GAP,HTPB,PEG,and F_(2314))were *** dynamics(MD)method was employed to investigate their binding energies(E_(bind))< compatibility,safety,mechanical properties,and energetic *** information and rules were reported for choosing better binders and guiding formulation design of high energy density material(HEDM).According to the calculated binding energies,the ordering of compatibility and stability of the five PBXs was predicted as epsilon-CL-20/PEG < epsilon-CL-20/ Estane5703 ≈ epsilon-CL-20/GAP < epsilon-CL-20/HTPB < epsilon-CL-20/F_(2314).By pair correlation function g(r)analyses,hydrogen bonds and vdw are found to be the main interactions between the two *** elasticity and isotropy of PBXs based epsilon-CL-20 can be obviously improved more than pure epsilon-CL-20 *** is not by changing the molecular structures of epsilon-CL-20 for each binder to affect the *** safety and energetic properties of these PBXs are mainly influenced by the thermal capability(C_p^(deg))and density(p)of binders,respectively.