最新刊期
卷 17 ， 期 5 ， 2004
- 摘要：As a newly developed Rigid Inorganic Filler (RIF),except for the effect of reinforcement and toughening for polymer materials,many other excellent properties of glass bead and glass bead filled polymer materials have attracted much interests.From the toughening effect of glass bead,the tensile properties,the dynamic mechanical properties,the rheological properties,the interface and other properties of glass bead filled polymer materials,recent advances were reviewed in detail.关键词：Glass bead;Polymer materials;Composites;Advances
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发布时间：2022-09-18 - 摘要：Poly (lactic acid) was linear aliphatic thermoplastic polyester and environmentally benign material,which attracts many researchers to widely research.In this paper,according to the biodegradable properties of the other composition in the blends,poly(lactic acid) blends were divided into two varieties of fully biodegradable blends and partially biodegradable blends.And the progress of poly(lactic acid) blends was reviewed,based on the miscibility,the crystal structures,the improvements of properties and the lowered costs,etc.Their advance in the future was also introduced briefly.关键词：Poly(lactic acid);Blend;Biodegradable
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发布时间：2022-09-18 - 摘要：Polyhydroalkanoates (PHA) are a class of thermoplastic polyesters formed as carbon and energy reserve materials by various bacteria under nutrient-limited conditions in the presence of excess carbon source. PHA possess not only mechanical properties similar to synthetic polymers,but some features such as biodegrability,biocompatibility,piezoelectricity and optical activity,leading to its great potential for applications in many fields.Numerous studies have been done on PHA.This paper mainly reviews the progress in biosynthesis of PHA in recent years.关键词：Polyhydroxyalkanoates(PHA);Polyhydroxybutyrate(PHB);Biosynthesis;Clone;Tissue engineering
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发布时间：2022-09-18 - 摘要：With the rapid developments of laser and optical fiber communication techniques,improving the electro-optical properties of nonlinear optical poled polymers was seriously demanded.This could be realized by researches and optimizations in the aspects of molecular design and poling method.In this paper,we summarized the more recent development of synthesis,structures and properties of nonlinear optical polymers with the clue of the main-chain structure and the gist of nonlinear optical properties of the polymers as well as prospected their future application in optic communication.关键词：Nonlinear optical effect;Poled polymer;Interpenetrating polymer network;Research advance
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发布时间：2022-09-18 - 摘要：Biomaterials must be biocompatible,especially blood-compatible.Following the theory on the forming of thrombus,this article provides an overview of several main methods of grafting in the surface of materials to develop the blood-compatibility of materials.关键词：Blood-compatibility;Graft;Endotheliocyte;Albumin;Phospholipid polymers
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发布时间：2022-09-18 - 摘要：The synthetic means of polystyrene-b-dimethylsiloxane and polystyrene-g-dimethylsiloxane copolymer were introduced, for example,anionic polymerization, macromolecular and atom transfer polymerization.The developing prospects of polystyrene-dimethylsiloxane were discussed.关键词：Polystyrene;Polydimethylsiloxane;Copolymer
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发布时间：2022-09-18 - 摘要：Poly (butylene succinate) are polyesters with outstanding biodegradability.This review introduced basic properties,degradation mechanism and preparation methods of poly(butylene succinate) as well as the character of various PBS-based biodegradable materials.Development trends and applications of PBS base biodegradable materials were described.关键词：Poly(butylene succinate);PBS-based biodegradable materials;Biodegradation
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发布时间：2022-09-18 - 摘要：The recent advance of research in the interphase of thermalpalstics/carbon composites was reviewed in this paper.As matrix of composites,thermalplastics were hardly to disperse homogeneously in the reinforeed fiber to achieve eximious soakage for the reason of high melting viscosity,the coalescent of interphase was not satisfying.Thus there should be a new cognition to the optimization of interphase.The interphases would show bad combination neither for the lack of chemical bonds,nor for the connection with short chemical bonds.Hence an interphase with not only strong combination but also excellent relaxation ability should be optimized,meanwhile,the good miscibility with matrix should also be achieved.As the concept from Pluddemann "coupling agent should be parts of matrix" was concerned. We think that the best one was polymer itself which acted as matrix in the composites.Namely,it not only bonded with fiber but also be miscible with matrix.Therefore,this would be a new method for the optimization of interphase in composites.关键词：Thermal plastic;Carbon fiber composites;Matching design of interface
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发布时间：2022-09-18 - 摘要：Due to the attractive biodegradation and physicochemical properties,poly (D,L-lactide-coglycolic acid) (PLGA)and o-carboxymethyl chitosan(O-CMC) were chosen to microencapsulate 5-fluorouracil (5-FU) by improved W/O/W method.The mean size of the resulting5-FU-loaded nanoparticles (NPs) was 98.5nm with fine polydispersity (0.192) and high Zeta potential (61.48eV).The drug-loading level and encapsulation efficiency of the NPs were 18.9% and 86%,respectively.SEM was used to study the morphological change of NPs during the degradation;and the weight loss of NPs and pH change of degradation medium were traced as well.The investigation of 5-FU release behavior from NPs showed that(1) the release kinetics of5-FU from NPs in early12hours was coincided with Hugucbi release equation;(2)the release kinetics in20days was coincided with Zero-level release.关键词：O-Carboxymethylated chitosan(O-CMC);Poly (D,L-lactide-co-glycolic acid) (PLGA);Nanoparticles(NPs);Anticancer drug
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发布时间：2022-09-18 - 摘要：A new type of water-based lubrication additive-colloidal polystyrene-carbon nanotubes(PSt-CNTs) has been prepared.TEM shows that the PSt-CNTs colloid is tubes with tiny balls in nanometer scale.Four-ball test results indicate that both the load-carrying capacity and anti-wear of the colloidal PSt-CNTs are much superior to those colloidal PSt owing to the additive reinforced by CNTs.The optimum colloidal PSt-CNTs content is 1.0wt%.The worn surfaces were analyzed using SEM.Finally its lubrication mechanism was deduced preliminarily.关键词：Carbon nanotubes;Polystyrene;Lubricant Additive;Emulsion
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发布时间：2022-09-18 - 摘要：The purpose of this review is to detail the current theoretical understanding of the origin of piezoelectric and ferroelectric phenomena in polymers;to present the state-of-the-art in piezoelectric polymers and emerging material systems that exhibit promising properties;and to discuss key characterization methods, fundamental modeling approaches,and applications of piezoelectric polymers.Piezoelectric polymers have been known to exist for more than forty years,but in recent years they have gained notoriety as a valuable class of smart materials.关键词：Smart material;Piezoelectricity;Amorphous polymers;Semicrystalline polymers;Dipole orientation
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发布时间：2022-09-18 - 摘要：The mechanism and influence factors of linear,anionic PAM of high molecular weight and median charge density are analyzed in the paper.The four effects of PAM on water,soil and fertility conservation and harvest increasing are summarized.The paper also refers to degradation of PAM in soil and application safety,and shows a wide application prospect.关键词：Polyacrylamide;Soil amendment;Degradation;Soil and water conservation
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发布时间：2022-09-18 - 摘要：The ideal of design of functional polymer materials is the soul of the course of the functional polymers.It is based on the polymer physics,which correlates the structure and properties of polymers.The main line of the course of functional polymer materials is the relationship between the structure and properties. Three ways can be taken into account for designing functional polymer materials,which are chemical structure designing,bulk structure designing and composite structure designing.关键词：Functional polymer materials;Molecular design;The relationship between the structure and properties
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发布时间：2022-09-18 - 摘要：The power of mixed solvents in polymer solutions may not be the simple average of the power of individual components.The goodness of mixed solvents was discussed in terms of the solubility parameter theory,the occurrence of preferential adsorption and molecular characteristics of the system,especially in terms of intermolecular interactions.关键词：Mixed solvents;Solubility parameter theory;Preferential adsorption;Intermolecular interactions
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发布时间：2022-09-18
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