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首页> 外文期刊>Digest Journal of Nanomaterials and Biostructures >EFFECT OF ALKALI TREATED WALNUT SHELL (JUGLANSREGIA) ON HIGH PERFORMANCE THERMOSETS. STUDY OF CURING BEHAVIOR, THERMAL AND THERMOMECHANICAL PROPERTIES
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EFFECT OF ALKALI TREATED WALNUT SHELL (JUGLANSREGIA) ON HIGH PERFORMANCE THERMOSETS. STUDY OF CURING BEHAVIOR, THERMAL AND THERMOMECHANICAL PROPERTIES

机译：碱处理核桃壳（核桃木）对高性能热疗剂的作用。固化行为，热力学和热力学性质的研究

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摘要

This paper presents a comparative analysis of high performance thermosets based on epoxy (Ep) and diaminodiphenylmethane (DDM) and its blend with DDM based benzoxazine (P-ddm); (Ep/P-ddm) with reinforcement using alkali treated walnut shell (TWN) at 10, 20 and 30 wt% reinforcement. Thermogravimetric (TGA) and x-ray diffraction (XRD) analysis of TWN showed improved thermal stability and crystallinity index. On 30 wt% TWN loading, the storage modulus (G′) of Ep/DDM system improved by 42%, while the values of G′ and Tg were enhanced by 58% and 30°C, respectively, on the similar loading in Ep/P-ddm, due to the increased number of functional groups on TWN particles. The degradation temperature peak (DTG) of all composites shifted towards the higher temperatures, which confirms the improved thermal stabilities. The prepared composites can be used in solder drip resistance and fire retardant applications as confirmed from limiting oxygen index and DTG peak value.
机译：本文对基于环氧（Ep）和二氨基二苯甲烷（DDM）的高性能热固性塑料及其与基于DDM的苯并恶嗪（P-ddm）的共混物进行了比较分析; （Ep / P-ddm），使用碱处理的核桃壳（TWN）以10、20和30 wt％的增强量进行增强。 TWN的热重（TGA）和X射线衍射（XRD）分析显示出改善的热稳定性和结晶度指数。在30％的TWN负载下，Ep / DDM系统的储能模量（G'）提高了42％，而在Ep的相似负载下，G'和Tg的值分别提高了58％和30°C / P-ddm，这是由于TWN颗粒上官能团的数量增加。所有复合材料的降解温度峰值（DTG）都移向了更高的温度，这证实了其改善的热稳定性。由极限氧指数和DTG峰值证实，所制备的复合材料可用于阻焊性和阻燃性应用。

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