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苯乙烯—丙烯酸钠共聚物改性PET结晶行为的研究 总被引:2,自引:1,他引:2
本文用DSC和FT-IR方法研究了PET/苯乙烯-丙烯酸钠共聚物共混体系的相溶性、等温结晶动力学、组成、温度等因素对结晶速率、结晶度等结晶行为的影响,并初步探讨了离聚物对PET的作用。 相似文献
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New linear and three-arm star polyisobutylenes carrying two and three terminal styryl endgroups, i.e., Fn = 2.0 and 3.0, respectively, have been prepared. The synthesis of these styryl-telechelic polyisobutylenes involved Friedel-Crafts alkylation by linear and/or three-arm star polyisobutylenes carrying tertiary chlorine endgroups of (2-bromoethyl)benzene or /β-bromoisopropylbenzene followed by de-hydrobromination. According to model studies, 1H-NMR, and UV spectroscopy, the conversions are essentially quantitative. These new terminally di- and tri-styrenated polyisobutylenes may be useful for the preparation of block copolymers and as cross-linking materials. 相似文献
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Many N-silylphosphinimines Me3SiN?P(X) RR′ undergo facile thermal decomposition with elimination of substituted silanes Me3SiX and formation of cyclic or polymeric phosphazenes (RR′PN). The process which is a new, general synthesis of phosphazenes has been used to prepare poly(dimethylphosphazene), (Me2PN), in nearly quantitative yield from Me3SiN?P(OCH2CF3)Me2. Convenient synthetic routes to the necessary silicon-nitrogen-phosphorus precursors are described and the results of their decomposition reactions are reported. 相似文献
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P. Rajalingam G. Radhakrishnan M. S. Lucia D. Kalyanasundaram 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(10):1471-1474
In spite of the low reactivity of allyl monomers, attempts have been made to prepare polymers by polyrecombination of allyl aromatic compounds. We were encouraged by the stability of allyl radicals [1-8]. The literature on the Claisen rearrangement of polyfunctional allyl aryl ethers contains some observations of the formation of tarry masses and resinification of polyfunctional aryl ethers. Details of the polymerization and the possible structures were not studied. We felt it interesting to synthesize this new monomer, 2-methyallyl-p-cresol, by the rearrangement, and to study in detail the polymerization and characterization of the polymer. 相似文献
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从含氢硅油制取水性氟硅聚合物 总被引:4,自引:1,他引:3
在无溶剂的条件下, 通过硅氢加成法将烯丙基聚氧乙烯聚氧丙烯醚, 氟化丙烯酸烷基酯接枝共聚到甲基含氢硅油侧链, 成功地合成了一系列有机氟硅聚合物. 通过高速剪切乳化法可制得不同质量投料比时的水性氟硅聚合物水分散物. 采用FTIR, 1H NMR和TEM对有关产物和乳液进行了结构分析, 并进一步系统研究了水分散物表面张力, 流变性等性能, 结果表明: 质量分数为2.0%的水性氟硅聚合物水分散物的表面张力降低至22.00~26.00 N/m, 其黏度随着剪切速率的增大有剪切变稠现象发生, 且不同质量投料比时, 其粒子粒径大小及形状也有较大差别. 相似文献
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含环氧端基酚酞聚芳醚腈的合成及表征 总被引:1,自引:0,他引:1
环氧树脂(ER)的冲击韧性和耐开裂性较差,因此,提高其抗冲强度而不显著影响力学性能和耐热性能是重要的研究课题.对于ER的增韧,以前主要采用液态橡胶.近年来,人们开始研究使用高性能热塑性树脂增韧ER[1~3].聚醚腈(PCE)是目前机械强度最高的热塑性... 相似文献
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Donald E. Kiely Arvind Vishwanathan Bevan P. Jarman Merilyn Manley-Harris 《Journal of carbohydrate chemistry》2013,32(6):348-368
Polyhydroxypolyamides (PHPAs) represent a class of synthetic polyamides derived from aldaric acid and diamine monomer units. This paper describes the synthesis of some poly(galactaramides), a class of polyhydroxypolyamides, that employs alkylene and substituted alkylenediammonium galactarate salts, with 1:1 molar equivalency of the diacid and diamine monomer components, as precursors for the polyamides. The salts were treated with acid/alcohol and then base in order to initiate the polymerization in methanol. The polyamides, labeled as prepolyamides, precipitated from solution and were then subjected to a second polymerization (postpolymerization) in a different solvent to produce a generally larger polyamide, labeled as a postpolyamide. 相似文献
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聚对苯基苯酚取代磷腈的合成与表征 总被引:9,自引:0,他引:9
环状三聚六氯化磷腈在α-氯代萘中开环聚合得到聚氯化磷腈.后者与对苯基苯酚钠反应合成了标题聚合物.测定了该聚合物的IR、~1H NMR谱.GPC估计其数均分子量为6×10~4.扭辫分析表明,该聚合物的玻璃化转变温度与粘流温度分别为0℃和130℃,硫化温度为210℃. 相似文献
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可溶性聚对二乙炔苯的合成与表征 总被引:2,自引:0,他引:2
一些π-共轭高聚物由于具有优良的荧光性能或三阶非线性光学性能而引起了人们极大的兴趣,合成新型可溶性π-共轭高聚物的研究已成为近年来的研究热点.对二乙炔苯的聚合研究已有报道. 相似文献
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环氧丙烷-三氯化铁、环氧氯丙烷-二乙基氯化铝和铝卟啉-环氧氯丙烷体系是合成分子量为10~4数量级晶态和10~5数量级非晶态聚环氧氯丙烷的比较理想的体系。利用合成产物的分级试样确定了非晶态聚环氧氯丙烷的Mark-Houwink方程。 相似文献
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聚硅乙炔烷的合成与性能研究 总被引:2,自引:1,他引:1
70年代初苏联学者首次报道了聚硅乙炔烷的合成[1],1973年有人用炔化钙和二甲基二氯硅烷在熔融盐中反应,结果得到四环体物(Me2SiC≡C)4[2]。为了研究这类聚合物的性能,我们采用了新的合成路线合成可熔的聚硅乙炔烷。乙炔和格氏试剂发生交换反应,生成炔基双格氏试剂,它和有机二氯硅烷发生缩聚反应,生成聚硅乙炔烷。 相似文献
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聚苯乙烯-甲基丙烯酸甲酯功能微球的合成 总被引:3,自引:0,他引:3
本文研究了在用乳液聚合法合成苯乙烯/甲基丙烯酸甲酯共聚功能微球过程中,乳化剂、电解质、油水比、溶剂等因素对共聚胶乳微粒的粒径大小和粒度分布的影响。结果表明,乳化剂的种类和浓度对生成胶乳微粒的粒径有很大影响,且胶乳微粒的粒径随电解质浓度的增加以及油水比的减小而减小,加入溶剂可明显提高所得微粒的粒径。 相似文献
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TheSynthesisofPoly(ethyleneoxide)┐Block┐Polybutylacrylate**SupportedbytheNationalNaturalScienceFoundationofChinaandDoctoralfo... 相似文献
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可溶性聚对苯乙炔衍生物的合成 总被引:4,自引:0,他引:4
聚对苯乙炔(PPV)具有独特的光电性能,经强氧化剂掺杂后是一类重要的导电材料[1],而且具有良好的非线性光学(NLO)性质[2],也是目前性能最好的高分子电致发光材料[3,4].可溶性的PPV衍生物有望在显示领域广泛应用,从而成为电致发光领域研究的新... 相似文献