THE DETERMINATION OF THE MOLECULAR WEIGHT OF POLYPROPYLENE - ScienceDirectdoi:10.1016/B978-1-4831-9882-8.50067-1The formulae, so far determined, for the purpose of calculating the molecular weight from intrinsic viscosity data, both for atactic and isotactic polypropylene, are examined.G. MORAGLIO...
The molecular weight distribution of several polypropylene samples was studied by the column elution method. With the exception of a lower molecular weight sample, the molecular weight distribution curves were found to be well described by a revised log-normal function presented by DAVIS et al. The...
applied tohighmolecular weight polyethyleneacrylamide, sodium polyacrylate solution of broken [...] hennly.com hennly.com 在单螺杆造粒机基础上研制成功的DLJ系列解碎造粒机可很好地解决胶状体物料的破碎问题,可广泛适用于高分子量聚丙烯酰胺、聚丙烯酸钠等物料的解碎造粒,拓宽了挤压法造粒的应用范围。
[...]of instant noodle products, the packaging materials were mainly of polystyrene (PS),polyethylene(PE)coated paper, polypropylene whereas lids of containers were made from PS / PE copolymers film. cfs.gov.hk cfs.gov.hk 雖然即食杯麪產品種類繁多,但包裝物料主要是聚苯乙 烯、聚乙烯塗層紙...
We have shown by two separate measurements that polypropylene when melted after irradiation undergoes crosslinking from the inception of irradiation. The first proof was an immediate increase in the solution viscosity of a narrow molecular weight fraction of polypropylene. The second proof was the marke...
Subsequently, he discovered crystalline isotactic polypropylene (iPP) and demonstrated “Single Helix” structure of iPP. Due to their seminal contribution, these two names are indistinguishably used in the field of olefin polymerization catalysts. By the time Ziegler and Natta walked to the dais in...
in the presence of an or... AH Chapdelaine,RT Grey,VJ Kures 被引量: 0发表: 1993年 A method for improving the mechanical properties and the verarbeitungsfaehigkeit of short-chain polytetrafluoroethylene The average molecular weight and the melt viscosity of crystalline polypropylene are reduced ...
The average molecular weight and the melt viscosity of crystalline polypropylene are reduced by heating at 210 DEG to 350 DEG C. in the presence of an organo-tin compound selected from (1) R2Sn(OOCR1)2, wherein R1 is alkyl or a phenolic group, <FORM:1019916/C3/1> (2) or [-Sn(R...
in the presence of an or... AH Chapdelaine,RT Grey,VJ Kures 被引量: 0发表: 1993年 A method for improving the mechanical properties and the verarbeitungsfaehigkeit of short-chain polytetrafluoroethylene The average molecular weight and the melt viscosity of crystalline polypropylene are reduced ...
A single molecule of isotactic polypropylene has a molecular weight of 2106. Calculate the length in cm when the chain is extended , and the volume occupied if the molecule forms a single crystal with a density of 0.906g/cm3. 相关知识点: 试题来源: ...