SMAS/AM/淀粉抗温接枝共聚物的研究

研究了甲基丙烯磺酸钠(SMAS)、丙烯酰胺(AM)与淀粉接枝共聚物的合成方法，接枝反应的影响因素和热稳定性。实验结果表明，该接枝反应基本符合自由基反应的一般规律，并且其聚合产物具有明显的抗高温能力。     

聚合物纳米复合材料的研究进展

介绍了聚合物基纳米复合材料的种类及制备方法，详细介绍了聚合物／层状硅酸盐纳米复合材料的研究，包括聚合物／层状硅酸盐纳米复合材料的种类、性能及研究的新进展。     

丙烯酸改性聚氨酯的合成与性能的研究

采用聚丙烯酸酯与聚氨酯共混、以水性聚氯酯为种子乳液进行丙烯酸种子乳液聚合以及水性聚氨酯与丙烯酸接枝共聚3种方法分别得到丙烯酸改性水性聚氯酯，通过激光散射粒径仪测定乳胶粒的粒径、乳胶膜的透明性、傅里叶变换红外光谱(FTIR)结构分析以及扫描电镜(SEM)对乳胶膜结构和表面形貌进行分析。结果表明：采用种子乳液聚合反应和接枝反应所得到的丙烯酸改性水性聚氯酯乳液乳胶粒粒径比水性聚氨酯的粒径显增大，表现出良好的相容性；由种子乳液聚合和接枝聚合制备的丙烯酸改性水性聚氯酯胶膜中颗粒与颗粒之间结合紧密，表面光亮、透明。     

一种聚羧酸型高效减水剂的试验研究

采用溶液共聚合成了一种聚羧酸型高效减水剂,对合成中影响减水剂性能的各种因素进行了分析;运用正交实验法,得出了合成该减水剂最佳配方和工艺条件;并研究了该减水剂对水泥净浆性能和混凝土性能的影响。结果表明,该产品掺量少(1.2%)、分散性能好(减水率25.4%)、混凝土性能高(抗压强度比178%)、不含甲醛等有害物,是一种良好的混凝土减水剂。     

Novel electrically conductive and ferromagnetic composites of poly(aniline‐co‐aminonaphthalenesulfonic acid) with iron oxide nanoparticles: Synthesis and characterization

Nanocomposites of iron oxide (Fe₃O₄) with a sulfonated polyaniline, poly(aniline‐co‐aminonaphthalenesulfonic acid) [SPAN(ANSA)], were synthesized through chemical oxidative copolymerization of aniline and 5‐amino‐2‐naphthalenesulfonic acid/1‐amino‐5‐naphthalenesulfonic acid in the presence of Fe₃O₄ nanoparticles. The nanocomposites [Fe₃O₄/SPAN(ANSA)‐NCs] were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X‐ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, elemental analysis, UV–visible spectroscopy, thermogravimetric analysis (TGA), superconductor quantum interference device (SQUID), and electrical conductivity measurements. The TEM images reveal that nanocrystalline Fe₃O₄ particles were homogeneously incorporated within the polymer matrix with the sizes in the range of 10–15 nm. XRD pattern reveals that pure Fe₃O₄ particles are having spinel structure, and nanocomposites are more crystalline in comparison to pristine polymers. Differential thermogravimetric (DTG) curves obtained through TGA informs that polymer chains in the composites have better thermal stability than that of the pristine copolymers. FTIR spectra provide information on the structure of the composites. The conductivity of the nanocomposites (～ 0.5 S cm^?1) is higher than that of pristine PANI (～ 10^?3 S cm^?1). The charge transport behavior of the composites is explained through temperature difference of conductivity. The temperature dependence of conductivity fits with the quasi‐1D variable range hopping (quasi‐1D VRH) model. SQUID analysis reveals that the composites show ferromagnetic behavior at room temperature. The maximum saturation magnetization of the composite is 9.7 emu g^?1. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

苯乙烯/丙烯酸丁酯微乳液共聚物链段分布的研究

以苯乙烯/丙烯酸丁酯(St/BA)为共聚单体,进行了微乳液聚合反应,测定了共聚物组成和共聚单体的竞聚率。由竞聚率计算了共聚物分子的链段分布,分析了共聚物分子的微观结构。     

BC-8嵌段聚丙烯并非嵌段物

介绍了日本三菱油化公司（现为三菱化学公司）BC-8嵌段聚丙烯的开发经过及实际结构。近年结构分析结果发现BC-8嵌段聚丙烯并非嵌段物，而是由均聚聚丙烯、EPR（乙丙橡胶）以及聚乙烯（链上有少量丙烯单元但并非嵌段物）三者组成的高分子合金。     

Humidity‐sensitive properties of new polyelectrolytes based on the copolymers containing phosphonium salt and phosphine function

A simple strategy was developed based on a new reactive function‐ and a salt‐containing new monomer, 4‐vinylbenzyl dimethyl 2‐(dimethylphosphino)ethyl phosphonium chloride (VDEPC), to obtain stable humidity‐sensitive membranes. The major ingredient of a humid membrane is crosslinked polyelectrolytes obtained from copolymers of VDEPC/2‐ethylhexyl acrylate (2‐EHA) = 1/0, 4/1, and 2/1. Isothermal humidity absorption experiments were performed for the estimation of humidity‐sensing materials. The crosslinked copolymers prepared from the reaction of VDEPC/2‐EHA = 4/1 with 1,4‐dichlorobutane showed an average impedance of 595, 39.1, and 3.9 KΩ at 30, 60, and 90% RH, respectively. Their hysteresis, temperature dependence, frequency dependence, and response time were measured. The reliability including water resistance and a long‐term stability were estimated for the application of the common humidity sensor. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1062–1070, 2003     

Graft polymerization of acrylic acid onto polyphenylene sulfide nonwoven initiated by low temperature plasma

Graft copolymerization of acrylic acid (AA) onto polyphenylene sulfide (PPS) nonwoven initiated by low temperature plasma was studied. The effects of various conditions on graft reaction and the grafting rate were investigated. SEM images showed that PPS nonwoven was grafted, and the graft copolymerization only occurred on the surface of PPS. It may be due to the chain transference going with the graft copolymerization. It was found that with the increasing of plasma power, treatment time, space between electrodes, monomer concentration, and temperature of graft polymerization, the grafting rate increased at first, went to the top, and then decreased. The PPS nonwoven surface graft reaction could be optimized by the following processing conditions: 120 s of plasma treatment time, 50 W of plasma power, 1.5 cm of space between electrodes, 30% (w/w) of monomer concentration, and 50°C of temperature of graft polymerization. Measurement of XPS showed that the peak of C1s of graft polyacrylic acid was existed, and the peak area increased with the increase of the grafting rate. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 5884–5889, 2006     

丙烯腈/醋酸乙烯酯/甲基丙烯磺酸钠三元水相共聚体系竞聚率的研究

根据该AN/VAC/SMAS三元共聚体系特征,根据竞聚率计算的原理,融合二元共聚和三元共聚的基础理论,利用核磁共振技术测定共聚物组成,用Mayo-lewis共聚物组成方程拟合实验数据计算竞聚率.同时研究了AN/VAC/SMAS三元水相共聚反应体系的特征,测定了该三元共聚体系表现竞聚率.