Methods are proposed for determining MD of polypropylene by temperature precipitation. Conditions of temperature fractionation in a solvent were established experimentally and confirmed theoretically; constants were calculated for the conversion of temperature distribution to molar mass distribution....
Molar mass is a physical property in Chemistry that refers to the mass of a substance divided by its amount, and it is measured in kg mol^-1. From: Brydson's Plastics Materials (Eighth Edition), 2017 About this pageSet alert Also in subject area: EngineeringDiscover other topics On this...
Vinyl-terminated polypropylene (Mn SEC=3,100... K Matyjaszewski,J Saget,J Pyun,... - Journal of Macromolecular Science: Part A - Chemistry 被引量: 48发表: 2002年 Molar Mass and Structural Characteristics of Poly[(lactide-co-(aspartic acid)] Block Copolymers Summary: We report on various ...
It is of interest to study the effects of branching agents on branched PET (BPET). In this investigation the influence of branching agent concentration and ... CWA Krohe 被引量: 0发表: 2016年 Effect of Nucleating Agents on the Molar Mass Distribution and Its Correlation with the Isothermal ...
The changes in molar volumes, heat capacities, and enthalpies generated by a mass-action model are in good agreement with the loss of hydrophobic hydration of the polypropylene oxide central block of the Pluronics. However, the molecularity of the endothermic transitions is much smaller than the ...
Various empirical correlations between linear viscoelastic properties and molar mass distribution of linear polymers have been proposed. Many of these summarize the distribution in terms of the first few moments. This is sufficient when studying samples of limited variability. In parallel, various fundame...
1) low-molar-mass liquid crystal 小分子液晶 1. These interactions lead to the disappearance of inherent layer structures of the polymers, thus influence the layer structures of the low-molar-mass liquid crystal in the mixed Langmuir-Blodgett films. 研究了含有全氟辛基的小分子液晶与聚合物液晶...
The additive of low molar mass liquid crystal chemical (cyclohexyl-biphenyl-cyclohexane (CBC33)) or lubricant (glycerol monostearate (GMS)) was individually added to the blends of SPS in order to investigate the effects on the crystallinity of the blended SPS. From the experimental results, it ...
A technical, iso-tactic Polypropylene melt i-PP was measured using an MCR rheometer equipped with an Electrical Temperature Device consisting of basis plate and actively heated hood. The actively heated hood is based on a combination of radiation plus convection (N2,g) heating to prevent polymer ...
The molar mass distributions of polypropylenes are often determined via GPC with 1,2,4-trichlorobenzene or 1-chloronaphthalene as the eluent. Experiments are usually performed at temperatures between 130°C–160°C [16]. In this temperature range the density of a typical isotactic polypropylene is...