水溶性高分子纸塑胶的研制

介绍了一种丙烯酸酯 -醋酸乙烯共聚乳液胶粘剂的制备方法 ,该胶粘剂适用于塑料瓶贴标及纸塑复合 ,具有干燥速度快 ,水溶性等特点 ,适用于机械化操作     

无规共聚聚丙烯的结构与性能研究

通过核磁共振(13CNMR),红外光谱(IR)和差示扫描量热法(DSC)等表征分析手段对无规共聚聚丙烯(PPR)的物理结构与机械性能进行研究。结果表明:PPR具有典型的无规共聚物的结构,乙烯基团较均匀的无规分散于丙烯分子长链中;在分子序列结构中,EE和EEE联排的结构并不多;乙烯含量低的EP接点的含量偏低,相应的抗冲击强度偏低,乙烯含量高的EP接点的含量偏高,相应的抗冲击强度较高。乙烯在丙烯分子长链中的无规插入也适当的降低了共聚物的熔点。     

A comparative study on water-based coatings prepared in the presence of oligomeric and conventional protective colloids

Poly(vinyl acetate-co-butyl acrylate) latexes were prepared by using semi-continuous emulsion polymerization method in presence of two different protective colloids which were oligomeric N-methylol acrylamide and conventional poly(vinyl alcohol). The effects of these protective colloids on colloidal, surface and film properties of latexes were examined. Poly(vinyl acetate-co-butyl acrylate) synthesized with oligomeric N-methylol acrylamide, which was characterized by FT-IR, NMR and MALDI-TOF MS, was found to have lower viscosity, finer particle size, better latex stability, lower polydispersity, higher T_g and better film forming behavior compared to those synthesized from the poly(vinyl alcohol).     

三元梳型共聚物胺化物对油品流动性能的影响

通过自由基聚合和胺化反应合成了马来酸酐-α-烯烃-苯乙烯-g-十八胺三元梳型共聚物胺化物,利用1H NMR分析了梳型共聚物的化学结构,并通过流变学方法考察了三元梳型共聚物胺化物对模型油和高蜡原油油品流动性能的影响。结果表明:梳型共聚物胺化物可降低模型油的屈服应力值,尤其对高沥青质模型油,最高降幅接近90%。对于高蜡原油,梳型共聚物胺化物降低其屈服应力值最高达78%,凝点最高降幅达2.6℃。     

ATRP合成线性苯乙烯-丙烯腈共聚物

以α-溴代异丁酸叔丁酯(t-BBiB)为引发剂,CuBr/2,2′-联二吡啶(Bpy)为催化体系,在70℃下经原子转移自由基聚合(ATRP)反应进行苯乙烯(St)和丙烯腈(AN)共聚合合成苯乙烯/丙烯腈共聚物。采用GC、~1H NMR和GPC对聚合反应过程和聚合产物进行了分析和表征。结果表明:单体浓度的半对数曲线与聚合时间呈线性关系,聚合物摩尔质量随单体转化率的上升而线性增加,而且摩尔质量分布在1.2～1.3之间,表现出活性聚合反应特征。随着聚合反应的进行,共聚物组成趋向于原始单体组成,大分子链存在梯度结构。     

Chemo-enzymatic synthesis and sustained release of optically active polymeric prodrugs of chlorphenesin

Optically active polymeric prodrugs containing saccharides were prepared via a facile procedure combining enzymatic resolution with chemical polymerization. Polymerizable optically active chlorphenesin derivatives were obtained in excellent optically purity (ee > 99.9%) and high yield (∼50%) in short time (∼4 h) by lipase-catalyzed resolution after optimization of reaction conditions. Then, polymerizable optically active monomer was copolymerized with different polymerizable glycolipids using free radical polymerization method. The obtained optically active polymeric prodrugs bearing (R)-chlorphenesin residue were characterized by IR, NMR and GPC. In vitro released studies showed that the cumulative released optically pure chlorphenesin (ee = 88-92%) from the polymeric prodrug (VADG) was from 19.3% to 34.3% in pH 7.4, pH 5.4 and pH 1.2 after 7 days. The cumulative liberation rate of optically active polymeric prodrugs (ee = ∼88%) with different glycolipids was from 26.4% to 38.5% in pH 1.2.     

TR-96型地毯粘合剂合成与研究

介绍了自交联丙烯酸聚树脂乳液的合成方法，对该合成反应的投料比例，反应温度，反应时间等基本工艺作了分析和探讨。     

EVA共聚物的性能与应用

EVA共聚物广泛用作电线电缆中的热收缩材料,半导电屏蔽材料和阻燃绝缘材料,本文简要综述EVA共聚物的基本性能。     

乳液多元共聚浆料的合成与性能研究

为了解决PVA浆料难以生物降解的问题,研制开发了可替代PVA的乳液丙烯酸酯共聚浆料.利用红外光谱仪对合成的多元共聚浆料的结构进行了分析确认.对浆液浆膜性能进行了测试,与接枝淀粉、PVA制成混合浆对涤棉混纺纱进行了替代PVA的上浆试验.结果表明:乳液多元共聚浆料具有较低的粘度;与接枝淀粉配合使用对涤棉混纺纱线上浆可完全取代PVA,浆纱耐磨性、强伸性良好.