胶束乳液聚合法低伤害储层固砂技术

为了解决化学胶结防砂方法中胶结剂占据一部分孔隙空间,造成渗透率大幅度降低而引起的储层伤害,基于乳液聚合原理,设计出一种由水、乙醇、阳离子表面活性剂、聚合单体和引发剂等组成的胶束乳液聚合低伤害储层固砂体系.该体系可在砂粒表面吸附一层阳离子表面活性剂胶束,胶束中增溶的聚合单体和引发剂发生乳液聚合,胶束转变为纳米级聚合物薄膜,将松散的砂粒胶结起来,形成具有较高机械强度的三维空间网络结构的固结体.胶束乳液聚合法可以作为一种低伤害储层固砂技术.     

电动修复清洗液的再生研究

利用732型阳离子树脂对含Cu,Ni的电动清洗液进行再生研究,结果表明,上行式交换效果明显优于下行式的交换效果,但流速对交换效果的影响不明显,流速为1～5 mL,min,对Cu、Ni的去除率都在97%～100%;考虑树脂性能,清洗液体积与树脂体积最佳比应为12:1;以50 mL浓度为5%的HCl对树脂进行再生,上行式明显优于下行式的洗脱效果.流速与洗脱率成反比关系,流速为0.5～1 mL/min的再生效果较为理想,洗脱率可以达到80%左右.     

原位聚合法制备微胶囊过程中影响因素的研究

为在乳液体系中制备具有较好表面形貌、粒径分布均一的电泳显示用微胶囊,以尿素和甲醛为原料,采用原位聚合法制备出脲醛树脂微胶囊,并对乳化剂的用量、搅拌速度、酸性催化剂的种类以及滴加速度和乳液的pH值等因素对微胶囊的形成、形态和质量的影响进行了系统的研究.结果表明,分别采用0.039 g(0.66x10-3moI/L)的吐温80(Tween-80)和0.1 mol/L的盐酸作为乳化剂和酸性催化剂,搅拌速度在600-800 r/min,乳液体系的pH值为1.5时所制备胶囊的形貌质量最好.     

原位聚合法制备聚碳酸亚丙酯/蒙脱土纳米复合材料及其性能

通过原位聚合的方法制备了聚碳酸亚丙酯(PPC)/蒙脱土(MMT)复合材料.TEM分析表明蒙脱土片层是以纳米尺度分散在聚合物基体中,形成了纳米复合材料.热学和力学性能测试表明,与纯的PPC相比,含蒙脱土的聚合物纳米复合材料的热学和力学性能举得到明显改善,尤其是材料的拉伸强度得到大幅度提高.     

Preparation of nano-compounded polyolefin materials through in situ polymerization technique: status quo and future prospects

Nano-compounding of polyolefins, an economical yet very effective route to high-performance polyolefin materials, has received considerable attention in recent years. Unlike most of the other polymers, polyolefins are chemically inert, which dictates that nano-compounding of polyolefins has to be conducted via in situ polymerization. In this review, a technological progress of the nano-compounding of polyolefins via in situ polymerization technique was summarized thoroughly, with emphasis laid on the current research status of polyolefin/montmorillonite (MMT) nanocomposites. A clear perspective for future researches on this specific family of materials was envisaged. Supported by National Natural Science Foundation of China (Grant No. 50373048) and State Key Development Program of Basic Research Program of Ministry of Science and Technology of China (Grant No. G2003CB615600)     

Preparation and Application of Microencapsulated Disperse Dyes

Microcapsules containing disperse dyes were prepared by means of in-situ polymerization. Polyester fabrics were multiple-transfer printed and color-mix printed using those microencapsulated dyes under different process conditions. By color measurement instrument, it can be seen that the times of multiple-transfer printing are up to ten while under appropriate conditions, especially when the transfer printing time is 50 seconds and the transfer printing temperature is 180° C. On the other hand, the K/S value of each transfer printing can keep almost constant. Meanwhile, the visual effect of color-mix printing with microencapsulated disperse dyes is special in the varicolored exhibiting if compared with conventional disperse dyes.     

两亲接枝共聚物作乳化剂时丙烯酰胺分配系数的确定

以两亲接枝共聚物－－聚苯乙烯接枝聚氧乙烯（ＰＳ－ｇ－ＰＥＯ）和聚人酸甲酯接枝聚乙烯（ＰＭＭＡ－ｇ－ＰＥＯ）作为乳化剂,选用合适的方法测试了丙烯酰胺（ＡＭ）在胶束和液滴中的分配系数－考察了两亲支共聚物的浓度对分配系数的影响,结果表明：分配系数与两亲接枝共聚物的浓度成正比关系,ＰＳ－ｇ－ＰＥＯ作乳化剂时,ηＰＳ－ｇ－ＰＥＯ＋０．１７６ｃＥ＾０．９８５,而ＰＭＭＡ－ｇ－ＰＥＯ作乳化剂时,ηＰＭＭＡ－ｇ－     

多用途覆合薄膜粘合剂制备与性能研究

以丙烯酸丁酯（ＢＡ）、醋酸乙烯（ＶＡＣ）赤主要单体,采用乳液聚合法制备多用途覆合薄膜粘合剂,探讨了ＶＡＣ、改性单体、乳化剂及反应温度对粘合剂性能的影响,得出最佳的制备条件为：ＶＡＣ用量１５％;改性单体用量４％;乳化剂用量２％;反应温度７５￣８３℃;所得粘合剂的剥离强度高达２８Ｎ／２５ｍｍ。     

高浓乳液聚合法制备单分散聚苯乙烯胶乳反应机理研究

报道了用高浓乳液聚合法制备均分散聚苯乙烯胶乳 ,并用激光散射对胶乳粒子进行了表征 .在单体、表面活性剂和引发剂质量一定的情况下 ,改变水的量 ,我们发现所得粒子直径与单体的质量分数呈线性关系 ,单体质量分数越大 ,粒子越小 .并对聚合机理进行了探讨 .     

Synthesis of styrene and tetrahydrofuran block copolymers by in situ transformation

In order to transfer the halogen terminus of polymers for block copolymer synthesis, the in situ trans-formation of living free radical polymerization of styrene into living cationic ring-opening polymerization of tetrahydrofuran was successfully performed. Three different initiator/catalyst systems of styrene were employed, I.e. (a) PhCH2C1/Bpy/CuC1, (b) 1-PEBr/Bpy/CuC1 and (c) CCl4/BDE/CuC1 system. With these monofunctional initiator or difunction-al initiator, both AB and ABA type block copolymers of styrene and tetrahydrofuran were obtained using a silver salt with strong acid (AgC1O4) as the transformation agent in the transformation of polymerization type. Characterization of these copolymers by nuclear magnetic resonance hydrogen spectra (1H-NMR), gel permeation chromatography (GPC) and dif-ferential scanning calorimetry (DSC) indicated this method is simple and feasible.