A new method to investigate the mechanical degradation of polymers in solution is described that uses size exclusion chromatograms of the initial polymer and of the degraded sample. The incipient parts of these chromatograms are analyzed to obtain kinetic data about degradation at the level of ...
polymers/ polymerscritical molecular weightmolecular weight distributionnarrow molecular weight distribution polystyreneslimiting degree of polymerisationmechanical degradationgel permeation chromatography/ A8120S Preparation of polymers and plasticsThe androgen receptor has a subset of target DNA sequences, which ...
2) Polymer degradation 聚合物降解3) biodegradable polymer 生物降解聚合物 1. Types, characteristics, preparation methods, and animal experiment of biodegradable polymeric microspheres containing drug were introduced with an emphasis. 综述了我国聚合物微球研究的新进展,重点介绍了可生物降解聚合物药物微球的...
OF THE DISCLOSURE The resistance to mechanical degradation of poly- mer modified lubricating oils can be improved by reducing the elastic character of the fluids at a given viscosity and polymer concentration. Stored energy per bond, which is the energy for degradation, and which is provided by ...
The aim of the study was to define physico-mechanical properties of developed materials. The scope of the studies included: examining the static mechanical properties, properties of the surface and their changes during degradation. Moreover, intensity of the release of degradation products to the ...
The commercial importance of polymer blends implies interest in knowledge of their degradation behaviour under environmental stresses. Processes accompanying thermomechanical and thermal degradation of blends of commodity polymers are reviewed. Thermomechanical degradation, characteristic of melt processing, include...
[ACS Symposium Series] Radiation Effects on Polymers Volume 475 || Radiation-Degradation Studies of the Mechanical Properties of Polymer Matrix Composites ... RL Clough,SW Shalaby 被引量: 0发表: 1991年 Mechanical properties and radiation resistance of polymer matrix composites used in superconducting...
of less than 10 and/or a polymer having a topological non-linearity as evidenced by long-chain branches or large rings or loops and wherein the linear polymer and the polymer containing long-chain branches are polyisobutylene, ethylene copolymers, ethylene ter- and tetrapolymers, poly(alkylated ...
Thermosetting polymers are used in various industrial applications [1]. In the marine environment, complex conditions such as high salinity, high pressure, high humidity, and alkaline corrosion accelerate the degradation of polymers and greatly reduce their reliability [2]. Bottles, vessels, and pipes...
CHF 3 is a greenhouse gas with little reactivity, ultrahigh global warming potential, and large output as a byproduct of CHF2Cl, a feedstock of the tetrafluoroethene series polymers. Its economical disposal is vital for greenhouse gas abatement and carbon neutrality. Herein, CHF3 is used as a...