丙烯酸2-乙基己酯与醋酸乙烯酯共聚合成高吸油性树脂的研究

以丙烯酸2－乙基己酯与醋酸乙烯酯为单体，采用悬浮聚合法，以单体自交联制得高吸油性树脂。对影响其吸油性能的多种因素，如单体配比、引发剂、油水相比的用量等，进行了系统的研究，得到的高吸油性树脂吸苯最高达16．1g/g，吸甲苯为14．8g/g，吸环己烷为13．3g/g，吸煤油为12．5g/g，可用于河面、海洋浮油的回收及工厂废水处理等领域.     

聚六亚甲基碳酸酯二醇增韧环氧树脂的结构与性能

采用羟基封端的脂肪族碳酸酯－聚六亚甲基碳酸酯二醇对环氧树脂进行了增韧，通过扫描隧道显微镜，扫描电子显微镜，差示扫描量热分析以及动态力学性能分析等方法研究了增韧ＥＰ的结构与性能的关系。     

助剂对Pd/树脂醚化催化剂催化性能的影响 Ⅰ.铝助剂的影响

研究了不同助剂对Ｐｄ／树脂醚化催化剂在临氢条件下对催化裂化汽油Ｃ５馏份与甲醇和Ｈ２反应的催化性能的影响。结果表明，在Ｐｄ／树脂醚化催化剂中引入Ｚｒ、Ｔｉ、Ｂ、Ｓｎ和Ａｌ等助剂后，都能改善催化剂的醚化、双键异构和二烯烃选择性加氢活性，其中以Ａｌ、Ｓｎ为最好。Ａｌ助剂的体积质量和负载方式对Ｐｄ－Ａｌ／树脂醚化催化剂的活性有影响。ＢＥＴ方法和Ｘ－射线荧光光谱分析（ＸＦＳＡ）表明，Ａｌ助剂对Ｐｄ－Ａｌ／树脂醚化催化剂的表面积、孔结构和Ｐｄ离子交换量影响较小。     

邻重氮萘醌改性酚醛树脂碱溶解特性的定量评价

本文提出了一种利用紫外—可见光分光光度仪定量评价高分子膜溶解速度的方法。并着重考查了邻重氮萘醌改性后的酚醛树脂在碱溶液中的溶解特性。实验表明,曝光后的树脂在碱溶液中首先溶胀,然后才开始溶解,即存在溶解滞后现象。溶解滞后和溶解速度与溶液的碱度有关,与树脂膜厚无关。     

环保中/高密度纤维板生产成本与性能问题 系统解决方案的研究(Ⅲ)

使用永港·伟方UF-1改性剂制备的改性脲醛胶粘剂生产E1级中纤板,胶粘剂生产成本降低10%,板材的各项力学性能均能达到国家标准,甲醛释放量达到了E1级标准,具有推广价值。     

织物树脂层压复合材料抗弹性能研究

针对防弹织物树脂层压复合材料的研制，考察了层压复合材料面密度，纤维类型，树脂体系，铺层混杂方式及纤维混杂分数，织物铺层，预置分层等因素对层压复合材料靶板弹道冲击性能的影响。     

硅粉/酚醛制备低成本碳化硅陶瓷复合材料

以低成本的硅粉和酚醛为原料 ,采用浆料浸渍 热压成型 反应烧结法制备了Cf SiC单向板 ,并对工艺条件进行了探讨。制备得到的单向板的弯曲强度达到 45 6 .8MPa ,断裂韧性达到 7.94MPa·m1 2 。     

钡酚醛树脂体系化学流变特性研究

在粘度实验和DSC热分析实验的基础上,对用于RTM工艺的钡酚醛树脂体系的化学流变特性进行研究,并根据双阿累尼乌斯方程建立树脂体系的流变模型。模型与实验结果具有良好的一致性。模型可揭示树脂体系在不同工艺条件下的粘度变化规律,定量预报RTM工艺树脂的低粘度平台工艺窗口,为合理制定RTM工艺参数、保证产品质量和实现工艺参数的全局优化提供必要的科学依据。     

Durability of hygrothermally aged graphite/epoxy woven composite under combined hygrothermal conditions

The objective of this study was to examine the effects of hygrothermal aging on the durability of a graphite/epoxy woven composite material system. The study was part of a larger project in which the objective was to evaluate and model the effects of moisture, temperature, and combined hygrothermal conditions on the strength and life of a graphite/epoxy woven composite material system. The results presented here represent an extension of the work by Patel and Case (Int. J. Fatigue 22 (2000) 809).

The hygrothermal aging consisted of cyclical temperature and moisture variations which were meant to simulate mission conditions for an advanced subsonic aircraft. Durability studies were carried out on the aged material system in the form of fatigue and residual strength testing under humid and elevated temperature environments. Damage mechanisms and failure modes were determined through fatigue testing, residual strength testing, and nondestructive evaluation.

Changes in physical appearance, thermal analysis results, fracture surfaces, and moisture diffusion behavior all supported the idea that the material was affected by the aging process. However, experimental testing also showed that the initial and residual tensile properties of the aged material were virtually unaffected by the imposed environmental aging (as compared to unaged material testing results), except when tested at elevated temperature. At elevated temperature, both the dynamic stiffness and residual strength were noticeably reduced from that at room temperature.     

硫脲树脂对Cu~(2+)吸附性能研究

考察了不同吸附时间、pH值和吸附温度下,聚对苯甲酰基硫脲树脂和聚酯基硫脲树脂对Cu2+的吸附性能影响;并对吸附动力学和热力学进行了研究。