不饱和聚酯片状模塑料力学性能的研究

研究了玻纤布、短切玻纤及碳酸钙对不饱和聚酯片状模塑料力学性能的影响,实验发现:玻纤布增强不饱和聚酯片状模塑料的力学性能比短切玻纤好,随着玻纤含量的增加,不饱和聚酯片状模塑料的拉伸强度先增加,达到一极大值之后减少。碳酸钙填充不饱和聚酯片状模塑料,随着碳酸钙含量的增加,不饱和聚酯片状模塑料的拉伸强度明显降低,弯曲强度增加。     

PE-UHMW挤出中空吹塑设备与工艺的研究

改型设计了改性超高相对分子质量聚乙烯的挤出中空吹塑设备，设计采用了专用的挤出螺杆、机筒、模头和模具，并研究改进了吹塑工艺及生产方法，从而克服了超高相对分子质量聚乙烯的加工难点，得到了合格的吹塑制品。     

塑料注射成型新技术——微孔发泡技术的应用

主要介绍微孔发泡技术的工艺过程、应用特性及加工条件、气体条件对微孔发泡过程的影响     

塑料注射成型新工艺

简要介绍了气体（水）辅助注射、模具滑动注射、熔芯注射、受控低压注射、注射－压缩、剪切控制取向注射、推－拉注射、层状注射、微孔发泡注射等注塑料工艺的原理，特点及应用前景，说明塑料注射成型工艺的发展趋势主要以节能，节约原材料，提高成型效率，改进制品性能，提高其附加值为前提。     

精密注塑件的生产稳定性探讨

针对精密注塑件的生产,介绍了设计,成型精密注塑件的基本要求,探讨了原材料,注塑机,电压,环境温湿度及模具积垢等因素对生产精密注塑件稳定性的影响,研究了评估工艺参数敏感性的试验方法和获得稳定工艺的手段;说明了统计过程控制（SPC）的基本原理,以及如何利用控制图和工序能力指数CP,CPK来评估,预测工序能力,确保工序确定性。     

Effect of crystallization and interface formation mechanism on mechanical properties of film‐insert injection‐molded poly(propylene) (PP) film/PP substrate

A previous study has shown that the adhesion between the film and substrate of film‐insert injection‐molded poly(propylene) (PP) film/PP substrate was evident with the increases in barrel temperature and injection holding pressure. In this second part of the research work, the crystallinity at the interfacial region (i.e., region between the film and the injected substrate) was extensively studied using FTIR imaging, polarized light microscopy, and DSC in an attempt to determine the level of influence that crystallinity has on the interface and bulk mechanical properties. Consequently, a more thorough and clearer picture of the influence of the inserted film on the interfacial crystallinity and subsequently the substrate mechanical properties, such as peel strength and impact strength, has been revealed. The initial proposition that crystallinity could enhance film–substrate interfacial bonding has been confirmed, judging from the higher peel strength with increasing crystallinity at the interfacial region. Nevertheless, the change in crystallinity was not only confined to the interfacial region. With the film acting as heat‐transfer inhibitor between the injected resin and the mold wall, the total crystal structure of the substrate was substantially altered, which subsequently affected the bulk mechanical properties. The lower impact strength of film‐insert injection‐molded samples compared to that of samples without film inserts provided evidence of how the film could impart inferior properties to the substrate. The difference in cooling rate between the substrate and film might also cause other defects such as warpage and/or residual stress build‐up within the product. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 294–301, 2005     

流变参数对顺序共注成型芯层熔体最大填充量的影响

基于Hele-Shaw模型，采用有限元数值模拟技术，系统研究了壳层熔体流变指数和零切黏度对顺序共注成型芯层熔体最大填充量的影响规律，并基于流变学理论揭示了其影响机理，最终提出了顺序共注成型芯层熔体最大填充量与壳层熔体流变指数和零切黏度经验关系方程。     

顺序共注射成型充填过程的数值模拟

基于Hele Shaw流动模型,推导出顺序共注射成型充填过程的数值模型;并引入厚度分数,采用控制体积法来实现运动界面的追踪。数值模拟结果与moldflow的模拟结果相吻合,并且能够正确反映芯皮层熔体黏度比对注射压力和界面形貌的影响。     

Cure monitoring via different techniques: Isothermal cure of an epoxy-novolac molding compound

The isothermal cure of an epoxy-novolac molding compound was studied by means of Fourier-transform infrared spectroscopy (FTIR) and dielectrometry (DE). Results obtained were compared with previous differential scanning calorimetric (DSC) observations. The behavior of epoxide conversion (_FTIR) measured via FTIR was found similar to (but not exactly coinciding with) the extent of cure (_DSC) determined previously by means of DSC. As for the DE analysis, directly measurable properties such as permittivity () and loss factor () varied in a complicated manner during the course of cure, showing strong dependence on both temperature and frequency. Other dielectric parameters (such as ionic conductivity, relaxed permittivity, and characteristic relaxation time) previously suggested in the literature as suitable for cure monitoring purposes were found difficult to determine within the limited frequency range (10⁰ to 10⁴ Hz) here. With some arbitrariness, the relative drop in log (at 100 Hz) was taken as an index (_DE) for the extent of cure. It was observed that _DE behaves in a manner similar to _FTIR and _DSC Comments on the application of these three techniques in the characterization of thermosetting systems were given.     

注塑模浇口位置优化新方法--经验搜索法

将数值模拟技术和优化算法相结合，提出了基于数值模拟技术的浇口位置的优化方法：经验搜索法。并对浇口位置与塑件质量关系进行了分析和总结，归纳出浇口位置设计的基本原则，提出了确定各类塑件浇口位置的具体准则。通过算例分析和方案比较，证明所提出的优化方法是行之有效的。