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聚合性能
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  polymerization performance
     PREPARATION OF A CHROMIUM BASED POLYETHYLENE CATALYST QCP 01 AND ITS POLYMERIZATION PERFORMANCE
     气相法铬系聚乙烯催化剂QCP-01的研制及其聚合性能
短句来源
     THE POLYMERIZATION PERFORMANCE OF NT-1 TYPE HIGH EFFICIENCY CATALYST FOR POLYETHYLENE
     NT-1型聚乙烯高效催化剂的聚合性能
短句来源
     Preparation of high efficiency PE catalyst Ⅱ. Polymerization performance of the catalyst
     高效乙烯聚合催化剂的制备 Ⅱ.催化剂的聚合性能
短句来源
     After analysing components of the high efficiency catalyst and propylene polymerization performance in high, low and room temperature reserve test, the result showed that stability of the catalyst was good, It might reserve at -30~45 ℃, so it suited to reserve and transport in special conditions.
     对高温、低温和常温贮存试验的高效催化剂的组成和丙烯聚合性能的分析 ,表明丙烯聚合高效催化剂的稳定性良好 ,适合在 - 30~ 45℃之间贮存 ,方便了丙烯聚合高效催化剂在特殊环境下的贮存和运输
短句来源
     The paper studied the effect of the pre-treatment on the polymerization performance of N catalyst. The result shows that pre-compounding benefits raising polymerization activity of the catalyst and bulk density of the polypropylene (PP) product and strengthening the resistance to impurity of the catalyst.
     考察了丙烯预聚、预络合对N催化剂聚合性能的影响,结果表明:预络合有助于提高催化剂的聚合活性以及聚合物的表观密度,提高催化剂的抗杂质干扰能力;
短句来源
  polymerization property
     Study on spherical polyethylene catalyst prepared from clay modified by magnesium chloride/alcohol adductⅡ. Polymerization property of the catalyst
     改性粘土用于制备乙烯聚合催化剂的研究 Ⅱ.催化剂的聚合性能
短句来源
     A method that change polymerization property of cyclopentadiene resin was put forward.
     提出了改变环戊二烯树脂聚合性能的方法.
短句来源
  “聚合性能”译为未确定词的双语例句
     Effect of Additives on Catalytic Activity for Acrylonitrile-polymerization by Ln(NPh_2)_3
     添加剂对Ln(NPh_2)_3催化丙烯腈聚合性能的影响
短句来源
     Effects of FeCl_3- Al(i-Bu)_3-phen Colloid System Preparation on Catalytic Activity for Butadiene Polymerization
     FeCl_3-Al(i-Bu)_3-phen胶体催化剂制备方法对催化丁二烯聚合性能的影响
短句来源
     The performances of propylene polymerization with a TiCl_4/MgCl_2/9,9bis(methoxymethyl)fluorine(BMMF) catalytic system in the absence of external donor were studied at various temperatures.
     研究了不同助催化剂和不同聚合温度对催化剂TiCl4/MgCl2/9,9-双(甲氧基甲基)芴(BMMF)丙烯聚合性能的影响.
短句来源
     The paper presents the structures of Ziegler Natta catalyst,Philips catalyst and metallocene catalyst for polymerization and the comparison of their catalytic properties,reviews their applications and developments in ethylene polymerization,discusses the structures and properties of PE made by these catalysts.
     介绍了高分子聚合用的ZieglerNatta 催化剂、Philips 催化剂以及茂金属催化剂的结构特点及聚合性能比较,论述了这些催化剂在乙烯聚合中的应用与发展以及所生成的聚乙烯的结构与性能。
短句来源
     By using Me2C(Ind)(Cp)Li2 and [(C9H7)Me2C]CpLi as -ligands, aseries of ansa-lanthanocene complexes have been synthesized andcharacterized in the first time. Their catalytic activities for polar monomerssuch as MilvIA were also studied.
     本文以Me_2C(CP)(Ind)Li_2和[(C_9H_7)Me_2C]CpLi为π辅助配体首次合成和表征了七个稀土金属有机配合物,并对其中一些配合物的催化聚合性能进行了研究。
短句来源
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  polymerization performance
Comparisons between relevant polymer properties show that the polymerization performance is only slightly influenced by the support.
      


A direct synthetic method of acrylonitrile has heen studied.It was synthe- sized at 80℃ by passing the gas-mixture of acetyleno and hydrogen cyanide in the mole ratio of 6-8:1 into a catalytic system(pH=1),composod of 625 gs of cuprous chloride,336 gs.of ammonium chloride and 625 gs.of water,the conversion percentage of hydrogen cyanide was greater than 92%.It was con- siderably affected by the moole ratio of acetylene and hydrogen cyanide and the velocity of passing the gas-mixture into the catalytic system.The...

A direct synthetic method of acrylonitrile has heen studied.It was synthe- sized at 80℃ by passing the gas-mixture of acetyleno and hydrogen cyanide in the mole ratio of 6-8:1 into a catalytic system(pH=1),composod of 625 gs of cuprous chloride,336 gs.of ammonium chloride and 625 gs.of water,the conversion percentage of hydrogen cyanide was greater than 92%.It was con- siderably affected by the moole ratio of acetylene and hydrogen cyanide and the velocity of passing the gas-mixture into the catalytic system.The amounts of hydrogen cyanide,acetaldehyde and acrylonitrile in the mixture of products were determined.The Small amount of impurities was romoved by fractional distillation.Acrylonitrile prepared by this method possesses the Same poly- merizing-ability as prepared by indirect meted.

我们对直接法合成丙烯腈进行了研究,以克分子比为7:1的乙炔与氰化氢的混合气体,通入含有625克氯化亚铜、336克氯化铵和625克水的催化剂(pH=1),在80℃反应,氰化氢的转化率达92%以上,乙炔与氰化氢的克分子配料比及通入催化剂的速度对产率有显著影响.对混合产物中的氰化氢、乙醛及丙烯腈含量进行了测定.用分镏的方法除去粗产品中的少量杂质,得到了与间接法有同等聚合性能的丙烯腈.

The initiator B for high-pressure polyethylene production, imported byPetroleum Chemicals Factory of Lanchow, after storage under 15°C. overa period of ten years, gave poor results when used in production. The causefor this has been investigated. Iodometric determination according to theprocedure described in reference (4) gave the peroxide content over 97%,Which is Within the prescribed technical level. Thermal decomposition ofboth the original sample and the twice-recrystallized sample in benzene at40°C. gave...

The initiator B for high-pressure polyethylene production, imported byPetroleum Chemicals Factory of Lanchow, after storage under 15°C. overa period of ten years, gave poor results when used in production. The causefor this has been investigated. Iodometric determination according to theprocedure described in reference (4) gave the peroxide content over 97%,Which is Within the prescribed technical level. Thermal decomposition ofboth the original sample and the twice-recrystallized sample in benzene at40°C. gave approximately consistent first-order kinetics, with rate const-ants varying with initial concentration. When used in emulsion polymeriz-ation of styrene, the initiator acted efficiently yielding polystyrene in theform of glassy beads, with conversion over 90%. Based upon the aboveresults it is concluded that the storaged initiator B, even though slightlydeteriorated as shown by the peroxide content due to decomposition, is yetan efficient initiator for styrene Polymerization and it should be possible touse it in high-pressure polyethylene production. The failure in actual produ-ction is presumably due to technological reasons.

兰州石油化工厂过去从国外进口的高压巨乙烯引发剂B经过在15℃以下冷库中贮放十年以上时间,用于生产效果不好,我们对其原因进行了分析研究。按照文献[4]中报导的碘量法进行测定,样品中过氧化物含量超过97%,仍在规定的技术指标之内。原样品及二次重结晶样品在苯溶剂中于40℃分解时,均给出近似一致的一级反应动力学,其速率常数随起始浓度而变化。当用原样品于苯乙烯悬浮聚合时,得到聚苯乙烯小球,转化率高达90%以上。根据以上结果,可以确定贮存引发剂B中过氧化物含量虽然稍有下降,但其引发苯乙烯聚合性能良好,用于高压聚乙烯生产应该是可以的。用于生产时效果不好大概是由于工艺上的原因。

Extracts from bark of Larix gmelini (Rupr.) Rupr. was studied to examine its potential value as bonding agent for particleboard without adding any synthetic resin. Starting from the extraction of raw material till the qualification tests of final products, some encouraging repeated results through the whole process were obtained. Extraction by 3 % sodium carbonate and sulfited was suitable. The yield could reach 30% based on oven-dried bark and its reactive phenolics up to 78%. Extracts were prepared both in...

Extracts from bark of Larix gmelini (Rupr.) Rupr. was studied to examine its potential value as bonding agent for particleboard without adding any synthetic resin. Starting from the extraction of raw material till the qualification tests of final products, some encouraging repeated results through the whole process were obtained. Extraction by 3 % sodium carbonate and sulfited was suitable. The yield could reach 30% based on oven-dried bark and its reactive phenolics up to 78%. Extracts were prepared both in desired concentrated liquid form and in dried powder. The powder was preferable due to the convenience for handling and kept for a year in room temperature without changing its effectual properties. Mixed planer shavings from ash and bass wood were first sprayed by concentrated extracts or by dissolved powder extracts which was easily soluable in hot water at about 60℃. Then, small amount of fine powdered paraformaldehyde was added to the shavings and the whole mass was well mixed for pre-pressing board. Schedule of hot press at 140℃ and 170℃ both under three-steps pressure was applied respectively. Types of particleboard of 1 cm. and 2 cm. in thickness were made and their density ranging from 0.67 to 0.80 g/cubic cm. which were mostly in the category of medium-density. Qualification tests such as modulus of rupture, tensile strength and thickness swelling were all met specification of our national standard. The progress in this field was reviewed and other related problems were discussed. This study proved that it is feasiable to use larch bark extracts as adhesive for particleboard with many advantages. To broaden the usage of this extracts and more barks from different tree species should be studied.

我们在研究落叶松树皮化学的基础上。根据它含有较高的多酚类和黄酮类化合物的特点应用其与甲醛反应的聚合性能,试验作为木工胶粘剂以供生产上的需要。这项研究以兴安落叶松树皮为主要原料,通过浸提、制胶、压板和质量测验等连续性的反复室内试验,先从刨花板开始验证其利用价值取得预期结果。采用稀碱直接处理树皮方法所浸提出干物质的得率按干树皮计可达30%,其中有用的反应物质达78%左右。浸提物可制备成浓缩液态或制成干粉更便于装运保存并易于热溶,质量不变。压板配胶主要用树皮胶粉及少量多聚甲醛,除石蜡外不加其它任何胶类或增强剂,施胶可用热溶约60℃胶水喷洒或将于胶粉洒匀,按一般三段加压,分别用140℃及170℃热压,制成1厘米及2厘米厚度的中密度刨花板,产品各项质量可达国家规定的一级品标准。综合分析衡量各方有关问题,认为落叶松树皮胶的一些优点是:一、资源丰富,得率较高;二、质量良好,成本较低;三、工艺简单,易于推广。此外,综合了国内外这类工作进展概况,展望未来,认为这类胶是有发展前途的。进一步研究使其能代替酚醛胶类,这对节约能源是有利的。即便作为一般木工胶以缓和胶源紧张也不应视为权宜之计。将来深入研究树皮多酚类和黄酮类化...

我们在研究落叶松树皮化学的基础上。根据它含有较高的多酚类和黄酮类化合物的特点应用其与甲醛反应的聚合性能,试验作为木工胶粘剂以供生产上的需要。这项研究以兴安落叶松树皮为主要原料,通过浸提、制胶、压板和质量测验等连续性的反复室内试验,先从刨花板开始验证其利用价值取得预期结果。采用稀碱直接处理树皮方法所浸提出干物质的得率按干树皮计可达30%,其中有用的反应物质达78%左右。浸提物可制备成浓缩液态或制成干粉更便于装运保存并易于热溶,质量不变。压板配胶主要用树皮胶粉及少量多聚甲醛,除石蜡外不加其它任何胶类或增强剂,施胶可用热溶约60℃胶水喷洒或将于胶粉洒匀,按一般三段加压,分别用140℃及170℃热压,制成1厘米及2厘米厚度的中密度刨花板,产品各项质量可达国家规定的一级品标准。综合分析衡量各方有关问题,认为落叶松树皮胶的一些优点是:一、资源丰富,得率较高;二、质量良好,成本较低;三、工艺简单,易于推广。此外,综合了国内外这类工作进展概况,展望未来,认为这类胶是有发展前途的。进一步研究使其能代替酚醛胶类,这对节约能源是有利的。即便作为一般木工胶以缓和胶源紧张也不应视为权宜之计。将来深入研究树皮多酚类和黄酮类化合物的基础理论并扩大树种和用途,可为充分合理利用

 
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