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Synthesis, Characteristics of a Novel Phosphorus-Silicon Containing Flame Retardant and its Application in Poly(ethylene-co-vinyl acetate)
关键字：flame retardant; synthesis; cone calorimeter; EVM rubber; composites
As the new regulations like the European Directives on WEEE (Waste of Electric and Electronic Equipment) and RoHS (Restrictions of Hazardous Substances) restrict the demand for some brominated flame retardants, there is a growing ...
http://www.polymer.cn/research/dis_info12432 |
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Nanofibers-based DDS electrospun from co-dissolving solutions of Eudragit L-100 and diclofenac sodium
关键字：Eudragit L100, Electrospinning, Drug-loaded nanofiber, Drug delivery systems, colon-targeted
The paper presents the preparation and characterization of nanofibers-based drug delivery systems (DDS) electrospun from co-dissolving solutions of Eudragit L100 and diclofenac sodium (DS). Eudragit L-100 and DS could well co-dissolve in a&...
http://www.polymer.cn/research/dis_info11748 |
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In-situ measurement of the formation process of poly(ethylene-co-vinyl alcohol) (EVAL) membran using an UTDR technique
关键字：ultrasonic time-domain reflectometry (UTDR),immersion precipitation,mass transfer,heat transfer
Ultrasonic time-domain reflectometry (UTDR) technique was employed to visualize the kinetic behavior of poly(ethylene-co-vinyl alcohol) (EVAL) membrane formation. EVAL membranes were prepared by immersionprecipitation method in water/dimethyl sulfoxide (DMSO)/...
http://www.polymer.cn/research/dis_info11639 |
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Structure changes and tensile properties of poly(4,4’-diphenylsulphone terephthalamide-co-3,3’-diphenyl-sulphone terephthalamide) fiber during drawing process
关键字：polyarylsulphonamide fiber,tensile property,crystal structure,drawing technology
The tensile properties of the high-temperature resistant Poly(4,4’-diphenylsulphone terephthalamide-co-3,3’-diphenylsulphone terephthalamide) (PSA) filaments were investigated by the temperature-controlled Stress-strain Tester. The effects of drawing rate, drawing ratio&nb...
http://www.polymer.cn/research/dis_info11568 |
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PS/PS-co-TMI/PA6 体系的反应相容*
关键字：反应相容 相容剂 相容效率 相容极限
本文以PS/PS-co-TMI/PA6 共混体系作为研究对象，着重研究了具有不同接枝量的反应相容剂PS-co-TMI 的反应相容效率，并通过SEM（扫描电镜）对共混形态进行了分析，并通过FTIR（红外分析）和DSC（差示扫描量热）的结果分析了最终共混体系的成分。
http://www.polymer.cn/research/dis_info10968 |
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On the Structure and Free Volume Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Membranes via Various Crystallization Conditions
关键字：positron annihilation lifetime, free volume, crystallization temperature, rigid amorphous fraction, long period.
The crystalline structure and the free volume properties within the amorphous phase of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) membranes depend on the preparation conditions. The difference of free volume properties among various PHBV mem...
http://www.polymer.cn/research/dis_info10753 |
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新型植物性聚酯PDHCA-co-PHA的合成与性能研究
关键字：植物性聚酯
使来源于天然植物的3，4-二羟基肉桂酸(DHCA)和对羟基苯甲酸 (HA) 在200℃下进行熔融缩聚[1~3]，制得了新型聚酯（PDHCA-co-PHA），用核磁共振（1H-NMR），傅立叶红外(FTIR)光谱和凝胶渗透色谱(GPC)对PDHCA-co-PHA 的结构与相对分子量进行了表征，结果表明所合成的共聚物结构明确。通过差示扫描量热（DSC）和X-射线衍射（XRD）研究了共聚物的热性能与结晶性能，结果表明：PDHCA-co-PHA 的玻璃化转变温度(Tg)随HA...
http://www.polymer.cn/research/dis_info9422 |
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Swelling mechanism of porous P(VP-co-MAA)/PNIPAM semi-IPN hydrogel with different pore sizes prepared by freeze-treatment
关键字：swelling mechanism, microstructure, freeze-treatment, diffusion coefficient, fickian Law
The objective of this paper is to investigate the effect of the microstructure of the gel on the swelling mechanism. So, a series of porous gel with different pore sizes were prepared by freeze-treatment conventional hydrogel...
http://www.polymer.cn/research/dis_info8605 |
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EFFECT OF Mg-Al LAYERED DOUBLE HYDROXIDE ON THERMAL PROPERTIES OF EMAA NANOCOMPOSITES VIA MELT COMPOUNDING
关键字：layered double hydroxide; poly(ethylene-co-methacrylic acid); nanocomposites;melt compounding
Layered double hydroxides (LDHs) is a family of inorganic fillers with layered structure. In the paper, poly (ethylene co methacrylic acid) (EMAA) MgAl layered double hydroxide (LDH) nanocomposites were prepared via melt compounding us...
http://www.polymer.cn/research/dis_info8533 |
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高分子量poly(lactic-co-glycolic acid)(PLGA)的合成
关键字：高分子量 PLGA 合成 表征
以丙交酯和乙交酯为单体，采用开环聚合法合成了高分子量的PLGA。借助红外光谱、核磁共振、X-射线衍射和扫描电镜对产品进行了表征。PLGA的分子量采用粘度法进行测定，并测定了其力学强度。结果表明，得到的丙交酯和乙交酯具有很高的纯度。制备的PLGA是典型的半结晶共聚物，其结晶度为18.72%。PLGA的分子量和力学强度均随着GA 含量的增加而逐渐降低。此外，PLGA的断口形貌结果表明，GA的含量越高，PLGA断裂表面上的微裂纹和孔隙...
http://www.polymer.cn/research/dis_info8196 |
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