交替马来酸酐共聚物多缩乙二醇酯盐络合物中阳离子－高分子相互作用的研究

交替马来酸酐共聚物多缩乙二醇酯盐络合物中阳离子－高分子相互作用的研究丁黎明，林云青，周子南（中国科学院长春应用化学研究所长春１３００２２）关键词高分子固体电解质，离子传输，电子轨道结合能高分子固体电解质（ＳＰＥ）可塑性强，易制成大面积均匀薄膜，并具有...     

统计结构含氟丙烯酸酯共聚物的合成与表征

本文对含氟丙烯酸酯(FMA)与甲基丙烯酸丁酯(BMA)的RAFT细乳液共聚合及动力学进行了研究, 计算得到了FMA与BMA的竞聚率并制备出具有统计结构的含氟共聚物乳液.     

聚甲基丙烯酸胆甾醇酯共聚物的合成、结构与性能研究 Ⅳ.PMACE的相态转变及光学性质

Finkelmann和等人对侧链胆甾型高分子液晶的研究表明,将具有液晶功能的低分子基团,经过一个软段连接到柔性高分子主链上的梳型高分子在一定的温度下可以形成液晶态,调节侧链高分子液晶的分子结构、软段长度,可以改变其相态转变温度及微区形态。前已报导具有不同侧链结构的聚甲基丙烯酸胆甾醇酯共聚物的合成、相态转变及光学性质,本文通过对聚甲基丙烯酸胆甾醇乙烯酯共聚物(PMACE)的液晶态及结晶态的微细结构及相态转变与胆甾侧链含量关系的研究,给出了液晶态的形成条件及结构特征。     

高密度聚乙烯／超高分子量聚乙烯共混物高取向薄膜形态结构与力学性能的研究

高密度聚乙烯／超高分子量聚乙烯共混物高取向薄膜形态结构与力学性能的研究张伟广，赵勇，杨德才中国科学院长春应用化学研究所，高分子物理开放实验室，长春，１３００２２）关键词ＨＤＰＥ、ＵＨＭＷＰＥ、共混物、形态结构、力学性能如何提高高分子材料抗张强度和模量...     

新型梳状高分子固体电解质的研究（Ⅱ）

新型梳状高分子固体电解质的研究（Ⅱ）丁黎明，林云青，梁洪泽，汪东梅，王佛松（中国科学院长春应用化学研究所长春１３００２２）关键词梳状高分子，ＮａＣＩＯ＿４络合物，固体电解质，离子电导率聚环氧乙烷（ＰＥＯ）可以溶解多种碱金属盐并形成络合物，这种络合物具...     

胆甾液晶／聚合物多组分体系的结构与性质研究——Ⅰ.胆甾醇壬酸酯…

应用ＤＳＣ、偏光显微镜和动态力学分析，研究了胆甾液晶与甲基丙烯酸甲酯－甲基丙烯酸丁酯无规共聚物共混体系的相容性及相态转变，表明共聚物的组成、分子量大小可抑制胆甾液晶的相态转变，给出了形成稳定相容的液晶／高分子体系的最佳条件。     

聚醚醚酮酮结晶度研究

聚醚醚酮酮结晶度研究刘天西，王尚尔，张宏放，莫志深（中国科学院长春应用化学研究所高分子物理联合开放研究实验室长春１３００２２）那辉，王军佐，吴忠文（吉林大学化学系长春）关键词聚醚醚酮酮，广角Ｘ射线衍射，结晶度新型特种工程塑料聚醚醚酮酮（ＰＥＥＫＫ）具...     

一种含胆甾醇介晶基团的侧链液晶高分子的合成

以２，４－二异氰酸甲苯酯（２，４—ＴＤＩ）、胆甾醇、丙烯酸β－羟丙酯为原料，合成了含胆甾醇介品基团的侧链液晶高分子、并用ＮＭＲ、ＩＲ和元素分析方法对其结构进行了鉴定。聚合物的相转变温度和形态织构用ＤＳＣ、Ｘ－射线衍射和偏光显微镜进行了测定和观察。     

美国麻省大学的高分子研究

美国麻省大学的高分子研究胡汉杰国家自然科学基金委化学部，北京１０００８３何天白中国科学院高分子物理联合开放实验室，长春１３００２２杨小震中国科学院高分子物理联合开放实验室，北京１０００８０麻省大学（ＵｎｉｖｅｒｓｉｔｙｏｆＭａｓｓａｃｈｕｓｅｔｔｓ，...     

一种不含介晶基团的两亲性高分子的热致液晶行为

一种不含介晶基团的两亲性高分子的热致液晶行为张希，张瑞丰，沈家骢，赵晓光，周恩乐（吉林大学化学系，长春，１３００２３）（中国科学院长春应用化学研究所，中国科学院长春高分子物理开放实验室）关键词两亲性高分子，疏水作用，热致液晶热致液晶分子结构中含有几何...     

Controlling final morphologies of two-step polymerization induced phase separated blends of trimethylolpropane triacrylate/acrylate copolymer through copolymer molecular weight

Effect of molecular weight of a thermoplastic copolymer on final morphology of polymerization induced phase separation of trimethylolpropane triacrylate/copolymer blends have been studied. Two acrylate copolymers, ACHM and ACLM, mainly based on methyl methacrylate, butyl acrylate and styrene were synthesized with high and low molecular weight, respectively. Final morphology of TMPTA/ACHM and TMPTA/ACLM blends were investigated by optical microscopic observation of ensemble of surface and bulk phase separation status points of view. Image analysis were done to provide related characteristic length scales.Polymerization induced phase separation of TMPTA/ACHM and TMPTA/ACLM resulted in different final morphologies with different characteristic length scales, which was attributed to the kinetic effect of the copolymer chains mobility during two-step phase separation induced during the thermal history and UV-irradiation periods.     

Vinyl polymerization. 410. Polymerizations of vinyl monomers initiated by poly(styrene-co-sodium acrylate) or poly(methyl methacrylate-co-sodium methacrylate). A verification of the concept of hard and soft hydrophobic areas and monomers

It was found that the copolymers of sodium acrylate (AA-Na) with styrene (St) and of sodium methacrylate (MAA-Na) with methyl methacrylate (MMA) could polymerize vinyl monomers in an aqueous phase without the usual initiator. Interestingly, there was a definite composition of the copolymer for the polymerization of a given monomer; for example, when poly(St-co-AA-Na) was used, St, MMA, vinyl acetate, ethyl acrylate, methyl acrylate, and acrylonitrile were polymerized by the copolymer having mole ratios of AA-Na:St of 0.61:0.29, 0.47:0.53, 0.38:0.62, 0.30:0.70, 0.24:0.76, and 1.00:0, respectively. The copolymers of various compositions can form hydrophobic areas (HAs) in the water phase. As has been repeatedly reported, the polymerization proceeds in the HAs, and the following new hypothesis was recently proposed that the hard (the less hydrophilic) HA prefers to incorporate the hard monomer and the soft (the less hydrophobic or the more hydrophilic) HA prefers to incorporate the soft monomer. The results mentioned above support this hypothesis.     

Platelet and bacterial repellence on sulfonated poly(ethylene glycol)-acrylate copolymer surfaces

Novel poly(ethylene glycol) (PEG) and sulfonated PEG (PEG-SO₃) acrylate copolymers have been prepared and characterized to apply as coating and blending materials for biomedical applications. The modified surfaces using acrylate copolymers demonstrated increased hydrophilicity, possibly due to the hypothesized reorientation of PEG/PEG-SO₃ chains into water phase. All copolymer surfaces demonstrated less platelet adhesion than control. In addition, platelet adhesion on copolymer surfaces decreased as the chain length of PEG and sulfonated PEG in copolymers increases. All copolymer surfaces reduced bacterial adhesion significantly and the adhesion level differs depending on surfaces as well as media. The obtained results attest to the usefulness of these copolymers as a coating or additive material to improve the blood compatibility of blood contacting devices.     

Atom Transfer Radical Polymerization with Polypeptide Initiators: A General Approach to Block Copolymers of Sequence‐Defined Polypeptides and Synthetic Polymers

Summary: A novel two‐step polymerization strategy allowing the integration of sequence‐defined oligopeptides into synthetic polymers has been demonstrated by the successful synthesis of an oligopeptide‐block‐poly(n‐butyl acrylate) copolymer. The approach utilizes a solid‐phase supported synthesis of an oligopeptide macroinitiator (SPPS) followed by solution‐phase atom transfer radical polymerization (ATRP) initiated by the oligopeptide macroinitiator. The resulting block copolymer exhibited a low (1.19) and a controllable .

Poly(n‐butyl acrylate)‐block‐oligopeptide.     

疏水缔合型增稠剂聚(丙烯酰胺-丙烯酸高级酯)的合成及增稠性能研究

采用沉淀聚合法合成了聚（丙烯酰胺－丙烯酸十四酯），聚（丙烯酰胺－丙烯酸十六酯）和聚（丙烯酰胺－丙烯酸十八酯），重点讨论了共聚物中疏水基团数量及疏水基团链长对增稠性能的影响。采用凯达尔定氮法和动态热分析（DMTA）测定了共聚物的组成及玻璃化温度。     

Thermal stability of copolymers of vinyl acetate and methyl acrylate

The thermal degradation of a series of copolymers of vinyl acetate and methyl acrylate and the two homopolymers poly(vinyl acetate) and poly(methyl acrylate) obtained using Ce(IV) as initiator has been investigated using differential thermal analysis (DTA) and thermogravimetry (TGA) in dynamic nitrogen. The kinetic parameters E, n, and A have been obtained following several methods of thermogravimetric analyses. The stability increases as the methyl acrylate content in the copolymer composition increases. The incorporation of 5 mol % of vinyl acetate in the copolymer produces a marked decrease in stability compared to the homopolymer poly(methyl acrylate). There is evidence for an intramolecular lactonization process in vinyl acetate—methyl acrylate copolymers.     

Ethyl Acrylate‐Hydroxyethyl Acrylate and Hydroxyethyl Acrylate‐Methacrylic Acid: Reactivity Ratio Estimation from Cross‐linked Polymer Using High Resolution Magic Angle Spinning Spectroscopy

Solution free radical copolymerizations of hydroxyethyl acrylate/methacrylic acid (HEA/MAA) and ethyl acrylate/hydroxyethyl acrylate (EA/HEA) have been conducted in m‐xylene (60 wt% solvent level) over the temperature range of 70–130°C using tert‐butyl peroxybenzoate as initiator. High resolution magic angle spinning spectroscopy (HR–MAS) and 2D–NMR have been utilized to characterize the copolymer gel for copolymer composition. The reactivity ratio values have been determined from low conversion copolymer composition data using the computer software package RREVM, which is based on the error in variables model (EVM) method. Also, Arrhenius‐type reactivity ratio expressions have been developed that describe how reactivity ratios vary with temperature.     

N-异丙基丙烯酰胺/丙烯酸十八酯共聚物水溶液胶束及相分离行为研究

合成了N异丙基丙烯酰胺(NIPAM)和丙烯酸十八酯(ODA)的共聚物.利用荧光探针和滴重法研究了NIPAMODA共聚物在水溶液中的胶束形成过程.同时还利用荧光探针法研究了共聚物水溶液在温度升高时出现的LCST(LowerCriticalSolutionTemperature)现象,表明该高分子在温度升高时存在着相分离现象.利用LB技术测量共聚物不溶单分子膜的PA曲线,发现随着温度升高共聚物的单分子膜越来越凝聚的反常现象,这从另一个侧面证实了共聚物NIPAMODA的相分离行为,并对此现象作了讨论.     

含丙烯酸的苯丙共聚乳液乳胶粒形态的电镜研究

采用透射电镜观测了苯乙烯-丙烯酸丁酯-丙烯酸乳液共聚体系的乳胶粒形态,讨论了组分含量、共聚物链柔性和乳液pH值等因素对乳胶粒形态、乳液粘度及成膜性的影响.结果表明:软单体的加入和体系pH值的提高将促进乳胶粒的粘连成膜和溶涨及部分聚合物的溶解.羧基主要富集于乳胶粒表面.     

Solubility and diffusivity of methylmethacrylate and butylacrylate monomers in a MMA–BA copolymer

Mutual diffusion coefficients and sorption isotherms of methyl methacrylate (MMA) and butyl acrylate (BA) monomers in methyl methacrylate‐butyl acrylate copolymer (MMA‐BA) have been measured by gravimetric sorption. MMA is found to have higher solubility and diffusion rates in the copolymer than BA. Sorption data for MMA were interpreted using classical Flory‐Huggins thermodynamic theory with a constant interaction parameter (χ). A modified version of this theory has been applied to correlate the sorption data of BA, which exhibit a temperature and concentration‐dependent χ parameter. For MMA, the isotherm data reveal enhanced polymer‐solvent interactions with increasing temperature, while for BA the data indicate a drive toward phase separation with increasing temperature. Despite the difference in thermodynamic behavior, both monomers are found to exhibit Fickian diffusion and the diffusivity data are correlated reasonably well with the Vrentas‐Duda free volume theory. Some deviation between the free‐volume correlation and the experimental data is observed at the lowest temperature and BA concentration examined. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 1996–2006, 2007