大型拉挤玻璃钢电缆桥架的研制

本文以 480× 36 0× 6mm大型拉挤玻璃钢电缆桥架为例 ,针对拉挤成型大尺寸的玻璃钢电缆桥架的外形、结构、性能设计以及生产设备、模具、工艺等技术问题进行探讨     

φ3．0m煤气炉的改造

对φ3．0m煤气炉生产强度低,消耗高的原因进行了分析,提出了炉底盘中心孔扩,提高炉膛高度等改造方案并加以实施,取得了较好的效果。     

Fracture and impact properties of modified nylon 11

Supertough nylon 11 is prepared by using a plasticizer. The influence of plasticizers on the impact property and tensile properties of plasticized nylon 11 were investigated. The results show that the impact strength is improved remarkably by methylbenzene sulfonamide, and the tensile strength is almost the same as that of natural‐grade nylon 11. The study of the fracture morphology on plasticized supertough nylon 11 indicates that the fracture surface of plasticized supertough nylon 11 has a special feature, which is different from the fracture surface of general ductile polymer materials. It is similar to that of a multilayer distorted lamellar structure. There are many oriented fibrillar clusters on each layer, which are perpendicular to the impact direction. This was a new breaking phenomenon, which is found on supertough nylon 11. In regard to the experimental results, a “multilayer crack extension” mechanism is put forward. The fracture of supertough nylon 6 also verified this mechanism. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 1600–1607, 2002     

二硼化锆陶瓷材料及其制备技术

主要介绍了二硼化锆陶瓷的制备技术，从二棚化锆的结构，性能到制备方法都做了综述和介绍，并对其前景和问题都做了展望。     

纳米碳酸钙粒子增韧增强不饱和树脂的研究

报道了纳米级碳酸钙填充不饱和树脂的性能研究，探讨了碳酸钙含量和钛酸酯偶联处理对不饱和树脂性能的影响，用扫描电镜（SEM）观察了试样的断裂口形貌，结果表明，用偶联剂处理的纳米碳酸钙粒子含量在4份左右时对复合材料的综合性能最佳，比未加纳米粒子的和未处理的材料冲击强度分别提高了370％和170％，拉伸强度分别提高了170％和150％，SEM分析说明未处理粒子增韧不饱和树脂的机理是粒子的“钉扎”效应和钝化裂纹，而偶联剂处理的纳米粒子增韧不饱和树脂的机理主要是料子导致基体产生了塑性变形。     

新型无机烧蚀材料的性能及潜在用途

本文对一新型石英纤维布增强无机型复合材料的制备及性能进行了一些探讨,指出其良好的高温热稳定特性及在烧蚀材料领域具有的潜在用途..     

Non-isothermal Crystallization of Poly(ethylene terephthalate) with Poly(oxybenzoate-p-trimethylene terephthalate) Copolymer

The influence of a poly(oxybenzoate-p-trimethylene terephthalate) copolymer, designated T64, on the non-isothermal crystallization process of poly(ethylene terephthalate) (PET) was investigated. All samples were prepared by solution blending in a 60/40 by weight phenol/tetrachloroethane solvent at 50°C. The solidification process strongly depended on cooling rate and composition of system. The crystallization rate of blends was estimated by crystallization rate parameter (CRP) and crystallization rate coefficient (CRC). From these results of CRP and CRC, it was predicted that the overall non-isothermal crystallization rate of PET would be accelerated by blending with 1–15 wt% of T64. The acceleration of PET crystallization rate was most pronounced in the PET/T64 blends with 5 wt% T64. The observed changes in crystallization behavior are explained by the effect of the physical state of the copolyester during PET crystallization as well as the amount of copolymer in the blends. An Ozawa plot was used to analyze the data of non-isothermal crystallization. The obvious curvature in the plot indicated that the Ozawa model could not fit the PET/T64 blend system well, and there was an abrupt change in the slope of the Ozawa plot at a critical cooling rate.     

炼厂外排污水回用于循环冷却水腐蚀影响因素初探

从单因素、多因素和复杂水系考察了炼厂外排污水回用于循环冷却水腐蚀的影响因素，结果表明，碳钢腐蚀的主要影响因素取决于离子特性、氧化膜的形成和溶解氧的扩散等综合协同作用，其中以离子特性的,影响为最大（如：Cl^-、Ca^2 、CO3^2-的腐蚀性较强）。碳钢腐蚀反应又可由以上三种主要影响因素分为三个反应控制区，而当电导率在0．1－2．0mS/cm范围时，其水质属于腐蚀危险高发区。从而也进一步说明水质的低电导率处理，其防腐效果并不理想，相反在高电导率情况下却表现出相对较好的低腐蚀性能。     

生物柴油的生产和应用

综述了生物柴油的发展历史和西方主要国家对生物柴油的研究、生产现状及有关的政策。讨论了各种生物柴油的制备方法及生物柴油应用的主要问题 ,对我国生物柴油的研究与开发提出了一些新的看法。     

MoO2Br2体系催化合成1,2—聚丁二烯—催化活性和聚合物分子量

催化体系活性的高低与主助催化剂(Mo与AL)及单体(D真)的加料方式有关,以Bd-Al-Mo的加料顺序为最佳。在固定Mo/Bd=7.0×10~(-5),与MoCl_4、MoCl_6和MoO_2Br_2体系相比,MoO_2Br_2体系催化活性最高,催化体系中Br代Cl真后,Mn和[η]的时间变化率,△Mn/△t和△[η]/△t,增大约1.5倍,Mn较其他钼系高约2倍,1,2—键节含量约98％,亦高于含Cl帽体系。