ethylene block 乙烯嵌段(2)   乙烯嵌段      Results show that PP-R and PP-B are crystallizable,but the crystallization rate and crystallinity of PP-R are slower and lower than that of PP-B.PP-R does not contain ethylene-propylene rubber(EPR) phase dispersed in the form of spherical particles and ethylene block(PE) phase,but PP-B does.      结果表明 ,PP -R和PP -B都能结晶 ,但PP -R结晶较慢、结晶度较低 ; PP -R不含而PP -B含有呈球粒状分散的乙丙橡胶 (EPR)相和乙烯嵌段 (PE)相 ; 短句来源      DSC graphs show that the ethylene block of PP 1330 can form co crystals with UHMWPE. Qenching makes co crystal markably increases ,therefore,the inter phase bonding force may be strengthened. \;      DSC谱图发现PP 1330的乙烯嵌段与UHMWPE可形成共晶 ,淬冷则可使共晶的含量显著增加 ,从而加强了两相间的结合力。 短句来源   相似匹配句对      in synthesis of ethylene.      可能在乙烯合成中所起的作用有所不同。 短句来源      fallopian tube block;      输卵管阻塞; 短句来源      DESIGN:Block randomizaed experiment.      设计随机区组实验研究。 短句来源      the relationship of ethylene and flower senescence.      乙烯与切花衰老的关系; 鲜花成熟度与瓶插寿命的关系等。 短句来源      Block copolymers of poly(L-alanine)/poly(ethylene glycol)(PAME) were synthesized by ring opening polymerization and their structures were characterized.      以氨基聚乙二醇单甲醚(MPEG-NH2)为大分子引发剂,采用开环聚合方法合成了聚L-丙氨酸-聚乙二醇嵌段共聚物(PAME),并对其结构进行了表征; 短句来源 查询“ethylene block”译词为用户自定义的双语例句     我想查看译文中含有：的双语例句 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。   ethylene block Mechanical properties-morphology of rolltruded propylene ethylene block copolymers 例句来源       Toughening isotactic polypropylene and propylene-ethylene block copolymer with styrene-ethylene butylene-styrene triblock copoly 例句来源                Propylene-ethylene block copolymer can be prepared by a simple process. Propylene was first homopolymerized in liquid monomer with a complex type catalyst, and then copolymerized in gas phase with ethylene and propylene. The activity and stereospecificity of the catalyst were so high that the very small amount of catalyst residues and atactic polypropylene possibly formed during the polymerization process might be left in the product without any further treatment. The block copolymer...             丙烯-乙烯嵌段共聚物可用较简易方法制得,使用络合型催化剂在液体丙烯中先进行均聚合,随后在乙烯和丙烯的气相中进行共聚合。由于该催化剂具有高活性和高定向能力,催化剂的残渣和无规物的含最很低,因而可以不经处理而残留在产品中。得到的嵌段共聚物含有5—20％(摩尔)的乙烯,并具有良好的耐冲击性能和机械性能。 文摘来源          Polypropylene is toughened by in situ fiber forming reinforcing of UHMWPE .The influences of shear stress at mixing,cooling system in molding and melt viscosity of UHMWPE on mechanical properties of composites are discussed. It is found that increase of shear stress and cooling velocity may benefit the enhancement of mechanical properties .The notched impact strength,tensile strength and elongation at break of PP/UHMWPE composites with composition ration of 90/10,can be 88.6kJ/m 2,45 1kpa,and 570%,re...             采用超高分子量聚乙烯 (UHMWPE)原位成纤增强、增韧聚丙烯 (PP)。讨论了混炼剪切力、成型冷却方式和UHMWPE熔体粘度对材料力学性能的影响。发现提高剪切力 ,加快冷却速度均有利于力学性能的提高 ,配比为 90 / 10的PP/UHMWPE的缺口冲击强度、拉伸强度和断裂伸长率可达 88 6kJ/m2 、45 1MPa和 570 % ,分别是PP 1330的 3 5倍、1 5倍和 2 5倍 ;而UHMWPE相对分子质量增加所引起的粘度上升则有损改性效果。DSC谱图发现PP 1330的乙烯嵌段与UHMWPE可形成共晶 ,淬冷则可使共晶的含量显著增加 ,从而加强了两相间的结合力。 文摘来源          Structure and properties of random copolymerized polypropylene(PP-R) and block copolymerized polypropylene(PP-B) and their blends are studied by IR,DSC,SEM and mechanical property testing.Results show that PP-R and PP-B are crystallizable,but the crystallization rate and crystallinity of PP-R are slower and lower than that of PP-B.PP-R does not contain ethylene-propylene rubber(EPR) phase dispersed in the form of spherical particles and ethylene block(PE) phase,but PP-B does.With the...             用IR、DSC、SEM和力学性能测试方法研究了一种无规共聚PP(PP -R)和一种嵌段共聚PP(PP -B)及其共混物的结构与性能。结果表明 ,PP -R和PP -B都能结晶 ,但PP -R结晶较慢、结晶度较低 ;PP -R不含而PP -B含有呈球粒状分散的乙丙橡胶 (EPR)相和乙烯嵌段 (PE)相 ;随共混物中PP -B含量增加 ,常温和低温冲击韧性显著提高 ,力学强度在略有下降后能持平或回升 ,这些性能变化是上述PP -R、PP -B结构特点的一种综合效应。 文摘来源   << 更多相关文摘         相关查询: block ethylene ethylene propylene block polymer ethylene) (ethylene ethylene-propylene block copolymers ethylene-propylene block copolymer polycaprolactone poly (ethylene oxide) block copolymer polydispersity ethylene-propylene block copolymer styrene-ethylene-butylene-styrene block copolymer poly (ethylene glycol)-polycaprolactone block copolymers polycaprolactone-poly (ethylene glycol) block copolymer  对查询结果不满意

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