甲基丙烯酸甲酯与琼脂糖的接枝反应及其共聚物的研究

本文研究硝酸铈铵作引发剂，甲基丙烯酸甲酯与琼脂糖的接枝共聚反应．考察了引发剂浓度、单体浓度、反应温度、反应时间及加料顺序对转化率，接技效率等的影响．红外光谱及热分析结果表明，所得产物为接枝共聚物．共聚物的玻璃化转变温度随接枝百分率的增加而降低，接枝共聚物可溶解于部分有机溶剂剂，并具有良好的热压成型性质．     

甲基丙烯酸甲醇与氰乙基化交联淀粉的接枝共聚反应及其改性接枝物对金属离子吸附性能的研究

以ＡＰＳ－ＴＵ和ＡＰＳ－Ｕ为引发体系，研究了氰乙基化交联淀粉与甲基丙烯酸甲酯（ＭＭＡ）的接枝共聚反应规律；ＩＲ，ＳＥＭ表征了产物的结构；当［ＡＰＳ］＝［ＴＵ］＝［Ｕ］＝３×１０－２Ｍ，［ＭＭＡ］＝６×１０－１Ｍ，Ｓ：Ｌ＝４：１００，６０℃，反应６小时时，Ｇ％、Ｅ％值最高．用ＮＨ２ＮＨ２改性后，含－ＣＯＯＮＨＮＨ２功能基的接枝共聚淀粉对Ｃｕ、Ｃｄ、Ｃｒ、Ｐｈ等重金属离子有较好的吸附性能．     

聚丙烯酰胺凝胶的研制

合成了带有芳香环的丙烯酰胺单体，使其与双甲叉丙烯酰胺共聚，改善聚丙烯酰胺凝胶的分子骨架结构，探讨了两类致孔剂的致孔机理．     

铈离子引发罗布麻接枝共聚反应──单体活性比较

本文采用丙烯酸甲酯（ＭＡ）、丙烯酸乙酯（ＥＡ）和丙烯酸丁酯（ＢＡ）．用铈离子引发将其与罗布麻纤维接枝共聚。结果表明：当［Ｃｅ４＋］为１０×１０－２ｍｏｌ／Ｌ、［Ｈ＋］为８×１０－２ｍｏｌ／Ｌ、［Ｍｏ］为１２×１０－２ｍｏｌ／Ｌ、４０℃反应３小时可得最大接枝率。在本文实验条件下，单体反应活性顺序为ＭＡ＞ＢＡ＞ＥＡ。     

松根轻油—苯酚—甲醛共聚合的研究

研究了松根轻油—苯酚—甲醛的共聚合过程,合成出性能优良的松根轻油酚醛树脂。利用红外光谱、核磁共振、质谱分析与元素分析等对松根轻油酚醛树脂的分子结构及基本性能进行测试,并探讨了共聚反应的机理。测试结果表明:松根轻油酚醛树脂具有高软化点、高油溶性等优良性能,可溶于多种有机溶剂;其生产工艺简便,原料成本低廉,具有较高的实际应用价值。     

Sulfonate-containing Copolymers Prepared by SemiContinuous Emulsion Copolymerizaiton of Styrene and Sodium Styrene Sulfonate

Soap-free emulsion copolymerization of styrene （St） and sodium sulfonate styrene （NaSS） could yield homodisperse sulfonate-containing particles with clean surface. But the incorporation of NaSS could never be increased beyond 2.6 % by weight in the conventional batch and seeded emulsion copolymerization in the ab- sence of emulsifier because large amounts of soluble polyelectrolyte would unstablize the reaction system if ex- cessive amount of NaSS was used. In our work, semi-continuous copolymerizations were carried out in the presence of mixed emulsifiers, and a new method to purify the latex polymer was developed. The influences of the NaSS mole ratio in the total monomers and the monomer addition time on the S content in the purified copolymer were investigated by elemental analysis.     

Mathematical Simulation of High-Conversion Binary Copolymerization

A new model for mathematical simulation of high-conversion binary copolymerization was established by combination of the concept of the three stage polymerization model (TSPM) proposed by Qin et al. for bulk free radical homopolymerization with the North equation to describe high-conversion copolymerization reaction exhibiting a strong gel effect, and the mathematical expressions of this new model were derived. Like TSPM, the new model also assmnes that the whole course of binary copolymerization can be divided into three different stages: low conversion, gel effect and glass effect stages. In addition, the reaction rate constants and the initiator efficiency at each copolymerization stage do not vary with conversion. Based on the expressions derived, a plot method for determining the overall rate constants and critical conversions was proposed. The literature data on conversion history for styrene (St)-methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDMA)-MMA copolymerizations were treated to examine the model, which shows that the model is satisfactory.     

分散剂对三元共聚反相悬浮聚合法合成高吸水性树脂的影响

以丙烯酸、丙烯酞胺、2—丙烯酰胺-2—甲基丙磺酸为原料，过硫酸钾为引发剂，N，N—亚甲基双丙烯酰胺为交联剂，环已烷为连续相，水为分散相，用反相悬浮聚合法合成了一系列高吸水性树脂，考察了分散剂种类、用量、混合分散剂、防粘剂对树脂物理状态和吸水性能的影响。     

钛酸四丁酯引发聚己内酯接枝改性淀粉的制备

以玉米淀粉和己内酯单体为原料,以钛酸四丁酯为催化剂,通过原位开环聚合制备聚己内酯接枝改性淀粉,并利用红外光谱和差热扫描对接枝改性淀粉和玉米淀粉进行了比较. 进而制备了接枝改性淀粉和聚己内酯的共混材料,并对共混材料的力学性能、疏水性和界面性能进行评价. 结果表明,对淀粉进行接枝改性后能够有效改善共混材料两相的相容性,且共混材料的力学性能有所提高. 共混材料的疏水性得到改善,吸水前后材料力学性能变化不大.