硬聚氯乙烯低发泡挤出成型研究

采用自由发泡挤出的方法研究了硬聚氯乙烯低发泡挤出成型的配方设计和工艺条件控制。讨论了稳定剂品种，改性剂品种和发泡剂用量对制品密度，泡孔结构以及外观表面的影响。还揭示了口模温度和螺杆转速与制品密度的关系。     

异型密封条挤出模头的研制

橡胶异型密封条板式挤出模头设计的关键点是首。何使口模区各胶料质点的出口压力及流速均匀一致和如何确定口模的形状尺寸。根据流变学理论设计出初始口型曲线尺寸、并需进行试挤以修正口型曲线和尺寸。本文以一典型异型密封条挤出模头的研制为例，详细介绍了异型密封条挤出模头的设计方法及基本思路。     

提高丙烯和混合碳四产品收率的对策与措施

中国石油化工股份有限公司茂名分公司化工事业部乙烯装置随着运行周期的延长，高低压脱丙烷塔和脱丁烷塔结垢严重，分离效果变差，造成丙烯和混合碳四产品的收率降低。通过分析丙烯和混合碳四产品损失大、收率低的原因，提出对策并采取相应措施，从而有效地提高了丙烯和混合碳四产品的收率。     

三芳基甲烷树脂的磁性行为

介绍了ＢＡ／Ｐｙ，ＢＡ／Ｐｈ和ＰＨＢＡ三种具有三芳基甲烷结构Ｂ阶树脂的合成方法及分子链的单元结构形式。对用紫外光和激光照射法进行脱氢反应的实验条件及脱氢化后树脂的磁性能（磁滞现象，矫顽力和磁化强度）进行考查。     

Synthesis of superabsorbent resin by ultraviolet photopolymerization

Synthesis of superabsorbent resin (SAR) was achieved by a new method, that of direct UV photopolymerization, and in particular the synthesis of a SAR of acrylic acid–potassium acrylate copolymer by UV photopolymerization was investigated. Influences of ratio (mol) of acrylate monomer to acrylic acid monomer, photoinitiators, crosslinking agents, and exposure time of UV light on the water‐absorbent properties were investigated. The results showed that the water absorbency (Q) of SAR based on Irgacure 1700 or Irgacure 1800 was 545–530 mL/g, but under the same conditions Q was 450 mL/g for the SAR based on Irgacure 651. N,N′‐Methylene bisacrylamide, hydroethyl acrylate, and glycerol were used as crosslinking agents, of which N,N′‐methylene bisacrylamide was the most effective. It crosslinked the molecular chains through attending the copolymerization with acrylic acid (AA) and potassium acrylate. When the exposure time was 5 min, the value of Q was 1368 mL/g (the content of N,N′‐methylene bisacrylamide was 100 ppm). © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1618–1624, 2004     

发酵法生产甘油的技术经济评述

介绍了甘油的国内外市场状况及发酵法生产甘油的技术进展，对１０００ｔ／ａ的发酵法甘油装置进行了经济评价。     

Structure and properties of collagen‐konjac glucomannan‐sodium alginate blend films

A new kind of blend film was made by mixing the solutions of collagen, konjac glucommnnan (KGM), and sodium alginate. The structure of the blend film was characterized by FTIR, XRD, atomic absorption spectrophotometer, and SEM, respectively. The effects of weight ratio between the polymers on light transmittance, tensile strength, elongation at break, water permeability, and water absorption of the film were studied. The results showed that there were strong interactions and good compatibility between collagen, KGM, and sodium alginate in the film. The film possesses good mechanical properties. Therefore, it can be applied in biomedicine as a new type of biomaterial. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

Evaluation of PLGA/chitosan/HA conduits for nerve tissue reconstruction

A micro-envioment for nerve cells and tissue growth were designed and constructed via surface modification of poly(L-lactide-co-glycolide)(PLGA) with chitosan and hydroxyapatite(HA). The poly(L-lactide-co-glycolide)/chitosan/hydroxyapatite (PLGA/chitosan/HA) conduits were manufactured by a combined solvent casting and particulate leaching technique. The conduits were highly porous with an interconnected pore structure and 76.5% porosity. Micropores with 50–100 micrometer diameter were formed in the conduits. In vivo application of PLGA/chitosan/HA conduits for reconstruction of 10 mm sciatic nerve defect was assessed by the walking track analysis, the quantifying of the wet weight of tibialis anterior muscle and the histological assessment. The conduits in host rats in vivo can not only be an effective in promoting regenerating of nerves but can also lead to favorable nerve functional recovery. Funded by the National Natural Science Foundation of China(No.50774096)     

退火温度对铜纳米颗粒复合材料的三阶非线性光学性质的影响

采用离子注入法制备铜纳米颗粒复合材料,在波长为790 nm的入射激光作用下,运用Z-扫描技术测量了铜纳米颗粒复合材料的非线性光学折射率和非线性光学吸收系数,分析了退火温度对铜纳米颗粒复合材料光学性质的影响。结果表明,随着退火温度的升高,铜纳米颗粒复合材料的颗粒尺寸明显增大,且光学非线性折射率上升。通过改变非晶二氧化硅中铜纳米颗粒复合材料的形状,得到不同的三阶非线性光学系数的特定值。     

PEGDA/NIPAM共聚物水凝胶的溶胀性能及体积相变研究

以IRGACURE2959为光引发剂,聚乙二醇双丙烯酸酯(PEGAD)和N-异丙基丙烯酰胺(NIPAM)为单体,通过紫外光引发光聚合合成了PEGDA/NIPAM共聚物水凝胶.研究了不同单体质量比凝胶材料在不同温度和pH值下的溶胀性能,测试凝胶在不同温度水中的体积相变.研究结果表明,水凝胶的平衡溶胀率随着NIPAM质量浓度增大而增大,随着环境温度的升高而减小,随着环境pH的增大而增大;NIPAM引入后,随着温度升高达到凝胶低临界溶解温度(LCST)时,凝胶平衡溶胀率及溶胀比减小明显加快,发生体积相变;随着NIPAM质量浓度的增大,凝胶溶胀饱和率减小,凝胶具备良好的延缓溶胀性能.