A. A. Dalinkevich, I. M. Piskarev, L. V. Fomin, T. A. Nenasheva
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引用次数: 0
摘要
摘要 本文介绍了一项关于聚酰胺 PA-6（聚-ε-己内酰胺）制成的聚酰胺纤维在空气中接受 X 射线辐照后强度下降的动力学研究结果，其吸收剂量率范围为 0.16-10 Gy/s。研究表明，辐照聚酰胺纤维的强度会根据剂量率下降到某个极限值，并可用可逆的伪一阶反应速率定律来描述。该模型考虑了领带大分子降解和交联对取向聚合物（纤维）强度的相反影响以及取向聚合物的结构特征。该模型与实验结果非常吻合，可以描述在辐射氧化降解和链交联过程同时发生时，取向聚合物（纤维）和以其为基础的单向复合材料强度的变化。
Kinetics of Radiation-Oxidative Aging of Polyamide Fibers and Composites Based on Them
Abstract
The results of a study on the kinetics of the decrease in strength of polyamide fibers made from polyamide PA-6 (poly-ε-caprolactam) irradiated in air with X-rays in the range of absorbed dose rates of 0.16–10 Gy/s are presented. It has been shown that the strength of irradiated polyamide fibers decreases to a certain limiting value depending on the dose rate and can be described by the rate law of a reversible pseudo-first-order reaction. A structural–kinetic model of radiation-oxidative aging of fibers is considered, which takes into account the opposite influence of degradation and crosslinking of tie macromolecules on the strength of the oriented polymer (fiber) and the structural features of the oriented polymer. The model agrees well with experiment and makes it possible to describe the change in the strength of an oriented polymer (fibers) and a unidirectional composite based on them while the processes of radiation-oxidative degradation and chain crosslinking occur simultaneously.
期刊介绍：
High Energy Chemistry publishes original articles, reviews, and short communications on molecular and supramolecular photochemistry, photobiology, radiation chemistry, plasma chemistry, chemistry of nanosized systems, chemistry of new atoms, processes and materials for optical information systems and other areas of high energy chemistry. It publishes theoretical and experimental studies in all areas of high energy chemistry, such as the interaction of high-energy particles with matter, the nature and reactivity of short-lived species induced by the action of particle and electromagnetic radiation or hot atoms on substances in their gaseous and condensed states, and chemical processes initiated in organic and inorganic systems by high-energy radiation.
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