废合成树脂制品的分解与再生利用

探讨了超临界流体的特性及废合成树脂制品在超临界水中的分解与再生利用     

改性HCPE防腐蚀涂料底漆的研制

采用丙烯酸 (AA)甲基丙烯酸甲酯 (MMA)与高氯化聚乙烯 (HCPE)进行混合接枝 ,制得HCPE防腐蚀涂料底漆。主要介绍了改性后的HCPE防腐蚀涂料底漆的配方 ;列举了该涂料与氯磺化聚乙烯 (CSM )防腐蚀涂料的性能对比 ,讨论了溶剂、改造树脂、以及接枝单体的比例关系对涂料性能的影响。     

大孔阳离子交换树脂催化合成己酸烯丙酯

本文研究了D_(72)型大孔阳高子交换树脂催化合成已酸稀丙酯,产率可达80％以上.     

Synthesis of modified melamine-formaidehyde resin

In this paper, the conditions of modified melaminc-fotmaldchyde resin (MF) used for a flocculent such as the ratio of reactant, reaction time, reaction temperature and the value of pi I, were studied. The preferable synthetic conditions were melamine:formaldehyde: acrylamide (mole)=1:5:(2∼3), reaction temperature 70°C, reaction time 4 h, pH9.0. Supported by the Science Foundation of Shanghai Municipal Commission of Education (97A26)     

织物增强混凝土薄板的高温力学性能与微观界面黏结破坏性分析

研究目的：探讨不同温度和持续时间对织物增强混凝土（TRC）薄板裂缝行为和承载能力的影响。通过微观扫描电镜观测观测,分析纤维编织网与基体混凝土间的界面黏结破坏机理。创新要点：明确了高温后纤维编纵网与基体混凝土之间界向粘结破坏的主要原因。以温度和持时为基本参数,对TRC构件的耐高温性能进行正确评价。研究方法：通过三点弯曲试验（地图3）,对高温后试什的力学件能（见图4、5）进行测试。通过微观扫揣电镜观测（见图8～10）,了解高温下纤维编织网、坏氧树脂及基体混凝土的形态。重要结论：1．环氧树脂任200℃高温作用90min时劣化严重,造成纤维网与基体之间的界血黏结破坏,这是导致试件破坏的主要原因;2．在常温或120℃作用下,掺加聚丙烯（PP）纤维可以较大幅度地提高TRC构件的乐载能力;但在200℃、持续时间较长的高温作用下,PP纤维的掺入对试件的乐载力几乎没有影响。     

复合二元酸改性环氧树脂的制备工艺研究

用C36二聚酸、癸二酸与1,4-丁二醇二缩水甘油醚和双酚A型环氧树脂进行扩链反应,制备柔韧性环氧树脂预聚体。考察了配方组成、反应温度和催化剂等因素对羧基转化率的影响。结果表明,对于所给配方,当催化剂用量为0.1%,140℃下反应2 h,反应基本完全。另外,以柔韧性环氧树脂预聚体为基体树脂制备的固化物拉伸强度达到12.0 MPa,断裂伸长率为85%。     

A visible and long-wavelength photocured epoxy coating for stone protection

An epoxy coating modified by PDMS hydroxyl terminated is presented in this paper in order to evaluate its potential use as a protective of a stone surface. With a view to its use in restoration sites, visible and long-wavelength photoinitiated cationic polymerization is proposed here. The system investigated is based on a crosslinking mechanism which shows remarkable advantages for stone protection, such as the low toxicity of the products and facility of mixture preparation. Furthermore, the visible light exploitation represents the most important advantage, because it is easy to apply in a restoration site, with or without irradiation instruments. Besides coating characterization through FT-IR, DMTA analyses and contact angle measurement on glass slides, analyses were also carried out on coated plaster samples. These analyses were performed in order to evaluate the effectiveness of the protective, in relationship to hydrophobicity (contact angle measurement, capillary water absorption) and morphology surface changing (SE/SEM observations, colorimetric measurements) before and after polymer application and UV aging test of coated samples. The overall characterization makes it possible to consider it a suitable coating for stone protection.     

连续离子交换系统在山梨醇生产中的应用

阐述了连续离子交换（ISEP）系统的工作原理、特点及其生产实践中应用情况，并与传统固定床式离子交换系统进行了技术经济比较。     

稳健多元校正方法及其比较研究

本文提出了基于简单中位数法和重复中位数法的四种稳健多元校正方法。介绍了文献中的两种稳健多元校正方法用于比较。提出了一种信息效能指标作为评价标准。     

1-(β-氰乙基)-2-甲基咪唑的合成及性能研究

2-甲基咪唑与丙烯腈在乙醇中反应合成1-(β-氰乙基)-2-甲基咪唑，产率95.3％，对其结构和物理性质进行了表征、测定。研究表明，以1-(β-氰乙基)-2-甲基咪唑为环氧树脂固化促进剂，其性能优于咪唑和2-甲基咪唑。