聚乙烯

In order to study the influence of preparation techniques on stability of different morphological silver colloid s, stable silver colloid s were produced by the reduction of AgNO3 with the protection of polyvinylpyrroli-done using KBH4 and N2H4 ----------- H2O as reductants.

为了研究制备工艺条件对不同形貌银胶体稳定性的影响，在超声场作用下，以AgNO3为前驱物，聚乙烯吡咯烷酮为保护剂，KBH4和N2H4·H2O分别为还原剂，制备了稳定的银胶体，并利用透射电镜和分光光度技术对制备的银胶体进行了表征。

UHMW-PE is a friendly and ideal material in the manufacture of protheses.

超高分子量聚乙烯无毒、无污染，是制作人工假体的理想材料。

The purpose of this work is to synthesize hydrophilic photosensitive polymers which possess high photosensitivity and at the same time high water resistance to fulfill the requirements of making screen printing plate for manufacturing electronic circuit board and thick film for integrated circuit and so on.

本文用重氮树脂为光敏剂，用聚乙烯醇和聚醋酸乙烯酯为成膜剂制作了感光性树脂，研究了聚醋酸乙烯酯对提高感光性树脂的耐水性的作用以及其对体系感度的影响。

The purpose of this work is to synthesize hydrophilic photosensitive polymers which possess high photosensitivity and at the same time high water resistance to fulfill the requirements of making screen printing plate for manufacturing electronic circuit board and thick film for integrated circuit and so on.

用重氮树脂为光敏剂、聚乙烯醇和聚醋酸乙烯酯为成膜剂制作了感光性树脂，研究了聚醋酸乙烯酯对提高感光性树脂的耐水性的作用以及其对体系感度的影响。

In the dissertation, a new stabilization method, equal-density method was adopted to prepare modified asphalts with storage stability at high temperature. In this method, a compound was prepared by premixing polymer and filler, and the compound was mixed with asphalt to prepare Polymer-Modified Asphalt by changing the ratio of polymer and filler. The asphalts with good storage stability were formed with the addition of filler, by regulating the density difference between polymer and asphalt. With identifying the effect of composition factor and the technique conditions on mechanical properties of polymer/filler compound and the molecular distribution of the polymer, identifying the effect of composition factor and the technique conditions on the properties and structure of polymer/filler modified asphalt, Styrene-Butadiene-Styrene copolymer, Low Density PolyEthylene, Styrene-Ethylene-Butadiene-Styrene block copolymer modified asphalts with good storage stability and performance were prepared. Rheological method, gel content analysis and swelling measurement were adopted to elucidate the interaction between the polymer and filler. Filler reduced the difference between the polymer and asphalt with the premixing technique, which led to the improvement of the storage stability of the modified asphalts. The thermo-oxidative aging process of base asphalt and PMA were studied and the effect of antioxidant additives on the base asphalt and PMA were analyzed.

本论文采用等密度方法，即预先混合聚合物与填料制备复合物，复合物在沥青中会吸收油份而溶胀，改变填料的用量从而调节聚合物与沥青的密度差异的方法，制备出高温贮存稳定的改性沥青，并研究了工艺条件和配方因素对聚合物/填料复合物力学和聚合物分子量分布的影响，系统考察了工艺条件和配方因素对聚合物/填料改性沥青性能与形态结构的影响，研制出性能优良、高温贮存稳定的苯乙烯-丁二烯-苯乙烯三嵌段共聚物、氢化SBS、低密度聚乙烯改性沥青，并通过流变学分析方法及凝胶和溶胀测试探讨了聚合物与填料的相互作用，指出经过预混工艺填料改变了聚合物与沥青的密度差异，以此说明聚合物/填料改性沥青高温贮存稳定的原因；研究了基质沥青和聚合物改性沥青热氧老化过程，并分析了抗氧剂对基质沥青及聚合物改性沥青的影响，探讨了抗氧剂提高沥青耐老化性能的原因。

XLPE power cable is widely used in grid system for its series of merits.

交联聚乙烯电力电缆由于其自身的一系列优点，在高压电网中得到了越来越广泛的应用。

Three activated carbons having different surface areas, coconut-shell based, pelletized and bamboo-derived, were modified by mixing them with four thermoplastic precursors, poly, hydroxy propyl cellulose, citric acid, and fluorine-containing polyimide followed by heat treatment at 900℃ for 1h.

三种具有不同比表面积的活性炭—椰壳基AC-C、粒状AC-P和竹基AC-B分别与四种热塑性前驱体—聚乙烯醇，羟基丙基纤维素，柠檬酸，含氟聚酰亚氨混合后，在900℃热处理1h。

Wrap a package; wrapped up the peelings.

每件衬衣都用聚乙烯袋包装。

Experience of process plants could include gas processing, ammonia, methanol, hydrogen, olefines sulphur, polyethylene, and polypropylene.

具备工艺装置经验包括天然气工艺、氨、甲醇、氢、烯烃、硫、聚乙烯、聚丙烯等。

It is necessary to develop a protein-free media for oocytes maturation that can prevent zona hardening. In this study, immature macaque oocytes were cultured in modified CMRL media alone or CMRL with either bovine calf serum or PVA for 24 hours. Also, in vivo matured oocytes were cultured in CMRL supplemented with PVA or serum for approximately 6 hours.

我们在本研究中，将非成熟的猕猴卵母细胞分别在改良的CMRL，或在含有胎牛血清或聚乙烯醇的改良CMRL培养基中培养24小时；同时，将体内成熟的卵母细胞分别在含有PVA或者胎牛血清的CMRL中培养6小时，然后进行体外授精，比较各组间精子穿透率或受精，以及胚胎发育情况。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。