摘要
系统研究了 Ｐ２５００ Ｈ Ｍ Ｗ Ｐ Ｖ Ｃ／ Ｐ４００２ 部分交联粉末 Ｎ Ｂ Ｒ 的共混配比与工艺—亚微相态—力学性能之间的关系。结果表明， 在硬度相同的条件下， Ｎ Ｂ Ｒ 用量增加， 共混体系压缩永久形变降低， 作者从结构和亚微相态给予了解释； 同时， 体系的冲击回弹降低， 强度和伸长率呈单峰形变化。 Ｎ Ｂ Ｒ／ Ｈ Ｍ Ｗ Ｐ Ｖ Ｃ＝ ４０／１００ 时， 体系的综合性能最佳。除了共混配比与体系压缩永久形变性能密切相关之外， 剪切作用越强， 部分交联粉末 Ｎ Ｂ Ｒ 在 Ｈ Ｍ Ｗ Ｐ Ｖ Ｃ 中分散越好， 亚微相态中近似网络结构越多， 体系压缩永久形变越低。
In this paper, the relationship between the morphology mechanical properties of P 2500 HMWPVC/P 4002 partially crosslinked powder NBR blend and its blending conditions including blend ratio, blending technology was systematically studied. Results show that: on the condition of approximately same hardness, the permanent compression set of HMWPVC/NBR is improved with the increase of partially crosslinked NBR content, which was explained on the basis of its structure and morphology. Meanwhile, the rebounding property of the system becomes deteriorated, while the strength and elongation show peaky curve. The optimum comprehensive properties of the system are achieved when the blend ratio of HMWPVC to NBR is 100/40. Although the blend ratio is closely related to the permanent compression set of the system, the permanent compression set is also largely determined by blending technology, that is to say, the stronger the shear stress which means the better distribution of partially crosslinked NBR in HMWPVC and the more approximate network structure in the system, the lower the value of permanent compression set. In addition, the morphological structure model of the blend system is also put forward in the paper.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
1999年第3期12-16,共5页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金
