原位聚合芳香型聚氨酯／环氧树脂共混材料的动态力学性能研究

以自制的芳香型二元醇为原料，用原位聚合的方法制备了芳香型聚氨酯厮氧树脂共混材料。系统地研究了二元醇含量对共混材料动态力学性能、冲击性能的关系。结果显示，对环氧树脂增韧的同时，低温下的储能模量基本上没有降低，玻璃化转化温度有所提高，体系为均相体系。     

2003年我国热固性工程塑料进展

根据2003年国内公开发表的文献，分类叙述了我国在热固性树脂及塑料方面的研究进展。热固性塑料的研究仍然集中在热固性大品种树脂的改性、精细化、功能化和专用化方面。用纳米粒子、晶须材料改性环氧树脂以提高其力学性能、热性能，改进酚醛树脂的烧蚀、阻燃、耐磨性能，改善聚氨酯材料的阻燃性、力学性能及抗静电性能等，成为2003年我国热固性塑料行业的研究重点。     

聚氨酯脲增强增韧环氧树脂的研究

用原位多相聚合法合成了聚氨酯脲／环氧树脂互穿网络聚合产物（ＩＰＮ）,测定了产物的力学性能和热性能,探讨了ＩＰＮ中聚氨酯脲含量对环氧树脂增韧过程的影响。     

改性聚氨酯包膜剂的合成与性能研究

用环氧树脂和淀粉改性聚氨酯用作肥料包膜剂。以聚醚多元醇、异氰酸酯、扩链剂、环氧树脂和淀粉等为原料,用溶液聚合法合成了改性聚氨酯弹性体。研究了环氧树脂和淀粉对材料力学性能和降解性的影响,对比了改性材料的缓释和降解等性能。     

环氧树脂改性聚氨酯材料结构与性能研究

将环氧树脂E-51添加到聚氨酯材料中,采用不同添加工艺制备了不同比例的环氧改性聚氨酯材料,进行了力学性能测试,并通过红外光谱、热失重分析等对聚氨酯的形态结构和耐高温性能进行了表征。结果表明,环氧基在催化条件下能顺利和异氰酸酯反应生成噁唑烷酮结构材料;E-51采用前期添加工艺,其材料力学性能及耐热性优于后期添加;随着E-51用量的增加,材料硬度提高,拉伸性能降低,耐高温性能逐步提高。     

聚氨酯脲增强增韧环氧树脂性能的研究

用原位多相聚合技术合成了聚氨酯脲 /环氧树脂互穿网络聚合物 (IPN) ,得到了环氧树脂准分子复合材料 ,测定了产物的力学性能和热性能 ,探讨了聚醚分子质量和聚氨酯脲加入量对环氧树脂增强增韧过程的影响 ,并对反应体系的活性进行了考察。     

功能性聚氨酯微胶囊研究进展

介绍了微胶囊的种类及功能作用,并重点阐述了聚氨酯芳香型微胶囊、相变型微胶囊、基因工程细胞型微胶囊、油汽输送减阻剂型微胶囊和热敏记忆材料用热响应型微胶囊的制备方法与性能,并展望了聚氨酯微胶囊的应用前景。     

无卤阻燃环氧树脂固化物及其结构与性能

环氧树脂固化物具有一系列性能优势,是重要的电子材料之一,但因其极易燃烧而存在火灾隐患。采用一类扭曲非对称结构的二氮杂萘酮型二胺和二酚型无卤阻燃固化剂,与双酚A型环氧树脂(E51)和含磷环氧树脂固化,所得固化物具有优异的热学和动态力学性能,T可达157℃,热线胀系数低;与含磷树脂固化后所得g材料的阻燃性顺利通过UL94 V-0级测试。     

1993年中国聚氨酯研究与开发应用文摘(三)

聚氨酯水分散体系改性丙烯酸胶粘剂的性能／经菊琴（宁波市化工研究设计院）／聚氨酯工业，1993，（4）：35～36聚氨酯水分散体系加入到丙烯酸树脂胶粘剂中，明显提高胶粘剂的粘结性能。聚氨酯的种类、添加量、湿度、热和光将影响改性后丙烯酸乳液的粘结能力。聚丁二烯型聚氨酯／环氧树脂互穿聚合物网络的研究／贾德民（华南理工大学高分子系）／合成橡胶工业，1993，16（3）：142～145用同步法合成了聚丁二烯型聚氨酯／环氧树脂互穿聚合物网络，借助傅里叶红外光谱、动态力学温度谱、透射电镜和力学性能测试等手段，研究其合成、结构、形态…     

京山北化推出新型活性聚氨酯型环氧增韧剂

京山北化复合材料厂最近推出活性聚氨酯型环氧增韧剂，因其性能优越而受到用户欢迎。该产品为无色至淡黄色黏性液体，易分散于环氧树脂及尼龙、ABS、聚酯、酚醛树脂、丙烯酸酯树脂等中，溶于甲苯、卤代烃、丁酮、乙醚、醋酸丁酯等中，固化后可改善材料的柔韧性，提高多种性能，还可直接用脂肪胺或芳香胺等固化而得到性能优越的弹性体。     

轮胎用芳纶帘线的性能研究

研究了纶帘线的物化性能、动态力学性能及芳纶带束层（缓冲层）轮胎性能。试验表明，芳纶帘线具有高断裂强度、高模量、低断裂伸长率及独特的耐切割性能；其动态模量高、弹性好、滞后损失率小，耐疲劳性能较差；芳纶子午线轮胎高速性能好、质量小、滚动阻力低。     

Mechanical properties of an aromatic polyamide-imide composite film reinforced with an aromatic polyamide fiber cloth at high temperature

An aromatic polyamide-imide (PAI) film was reinforced with a plain cloth of aromatic polyamide fiber (Du Pont, Kevlar 49). The mechanical properties of the composite film were investigated by examination of the temperature dependencies of tensile dynamic mechanical properties, stress relaxation, and tensile stress-strain behaviors. The softening temperature of the composite film was lower than that of a homogeneous PAI film. At a high temperature, Kevlar fibers may act as a thermal conductor and lower the softening point of the PAI composite. The mechanical properties of the composite film at a high temperature are mostly controlled by the PAI matrix.     

Novel quinoline-based polyurethane elastomers. The effect of the hard segment structure in properties enhancement

Polyurethane elastomers incorporating a quinoline moiety along their polymeric backbones and aliphatic, aromatic or heterocyclic crosslinkers have been synthesized and characterized. For this, NCO-terminated urethane oligomers were prepared from poly(butylene adipate) diol and methylene diphenyl diisocyanate and were subsequently chain extended with 2,4-quinolinediol and different crosslinkers. This study reports the influence of the different crosslinker chemical structures and the hard segment molar ratio on the thermal and dynamic mechanical thermal properties, as well as on the mechanical properties of these elastomers. The fluorescence spectra of polyurethane elastomers were determined at an excitation wavelength of 290 nm. The different chemical structures of the crosslinkers determine the hard segment cohesion and reduce the mobility of the soft phase, having an important effect on thermal stability and on the mechanical properties of the polyurethane films. Thus the incorporation of aromatic crosslinkers results in polyurethanes with lower elongation and stress at break. The highest mechanical properties were obtained for polyurethanes crosslinked with aliphatic crosslinkers.     

刚性聚氨酯增韧改性环氧树脂的研究

在环氧树脂(EP)中加入以对苯二甲酸二甲酯为原料合成的端羟基芳香聚酯及2,4—甲苯二异氰酸酯(TDI),采用原位聚合法制备了刚性聚氨酯(PUR)增韧改性EP。用红外光谱表征了其反应,探讨了端羟基芳香聚酯含量、端羟基芳香聚酯与TDI摩尔比和固化剂用量对改性EP力学性能的影响,并用扫描电子显微镜观察了改性EP的冲击断面。结果表明,在提高EP韧性的同时,改性EP的其它力学性能都得以提高。     

Phase morphology and mechanical properties of blends of poly(p-phenylene sulfide) and polyamides

An experimental study of the blending, thermal transitions, phase morphology, and mechanical properties of poly(p-phenylene sulfide) (PPS)/polyamide blends is presented. Nylon-6, rubber modified nylon-6, nylon-66, nylon-11, nylon-12, and two partially aromatic amorphous polyamides were included in the study. Generally, blends of PPS with aromatic amorphous polyamides exhibit better mechanical properties than those with aliphatic polyamides. The blends with nylon-12 exhibit the best characteristics among the aliphatic polyamides.     

Preparation of an acrylics‐grafted polyester and its aqueous dispersion—mechanical properties of acrylics‐grafted polyesters

Mechanical properties of grafted polyesters were discussed. In the case of grafting of acrylics of more than 25% in the grafting product, mechanical properties of the grafting products decreased greatly compared with the raw polyester. The influence of the molecular structure of the grafted polyester was not observed. The effect of composition of the grafted polymers was discussed. Mechanical properties varied with the composition of the side chain. In the case of grafting onto aromatic polyesters, grafting of an aromatic unsaturated monomer improved the mechanical properties of the grafted polymer. On the other hand, in the case of grafting onto an aliphatic polyester, grafting of an aliphatic unsaturated monomer improved mechanical properties of the grafting polymer. We found that the grafting of the polymer having a high compatibility with the polyester improved the mechanical properties of the grafting products, from the determination of the compatibility of each polymer and the mechanical properties of the grafting products. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1149–1157, 2000     

原位聚合制备抗紫外芳香族支链锦纶6及其应用

通过添加均苯四甲酸二酐进行原位聚合制备抗紫外芳香族支链锦纶6(PA6-Ti O2)母粒,后与线型PA6进行共混纺丝,研究了抗紫外芳香族支链PA6的聚合工艺、纺丝工艺,探索支链PA6对纤维热学性能、加工性能、力学性能等的影响。结果表明:随着均苯四甲酸二酐含量的增加,芳香族支链PA6聚合熔体黏度减小,相对黏度逐渐降低,表明芳香族支链PA6的流动性增加;其结晶熔融温度逐渐降低,在相同纺丝温度下螺杆压力下降,表明可以有效改善其加工性能,但对纤维的力学性能有一定的影响;制备的抗紫外纤维在280~320 nm波长内,紫外线透过率小于10%,具有较好的紫外线遮蔽性能,从纤维断面扫描电镜(SEM)谱图可见基体相容性好。     

SBR/有机蒙脱土纳米复合材料的结构与性能研究

通过控制加入芳烃油、相容剂，采用乳液插层法制得了2种不同亚微观结构的SBR／有机蒙脱土（0MMT）纳米复合材料。透射电镜显示制得了插层型和半剥离型纳米复合材料。实验结果表明：炭黑N330的加入，降低了复合材料的延迟硫化现象，改善了复合材料的加工性能；SBR／OMMT／N330纳米复合材料具有优异的力学性能，其耐磨性能下降。     

Dynamic mechanical properties for polyurethane elastomers applied in elastomeric mortar

Dynamic mechanical properties of a polyurethane (PU) elastomer and a mortar processed with the same elastomer (modified polytetramethylene ether glycol (PTMEG)) were studied. The results obtained showed that the liquid aromatic amine ETHACURE® 300, used as cure agent, can be used to substitute the aromatic amine MOCA®, which is usually used as cure agent in high performance elastomers. The resulting mortar produced with ETHACURE® 300 presents similar dynamic‐mechanical thermal properties when compared with MOCA ®. However, dynamic‐mechanical thermal analysis studies showed that the mortar developed with ETHACURE® 300 presents some advantages such as the low values of tan δ, indicating a good capacity of recovery of the strain after retreating an applied force. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

新型低黏度苯并(口恶)嗪树脂

介绍了1种新型低黏度苯并口恶嗪树脂,用旋转黏度计研究了这种树脂的黏度,用DSC和凝胶化时间测试等研究了其固化反应行为,并对树脂浇注体和复合材料进行了力学性能测试。实验结果表明,这种树脂具有良好的工艺性能和较高的力学性能,可作为树脂传递模塑成型RTM的高性能复合材料基体树脂或高性能封装用树脂。