摘要
采用单独含有NH_3、HY的天然橡胶作为对照样,与含有复合保存剂HY/NH_3的天然橡胶进行性能比较,利用红外光谱仪测定天然橡胶结构,橡胶加工分析仪测定其加工性能,核磁共振交联密度仪测其交联密度,研究复合保存剂HY/NH_3对天然橡胶性能的影响。结果表明,HY/NH_3几乎不影响生胶结构;在应变、温度扫描环境下,NY-1的弹性模量G’最大,损耗因子tanδ最小,NY-3居中;在频率扫描环境下,NY-3的弹性模量G’最大,损耗因子tanδ居中,NY-1的弹性模量G’居中,损耗因子tanδ最小;三种扫描环境下,NY-2的弹性模量G’均最小,损耗因子tanδ均最大;老化前,复合保存剂样品的总交联密度小于NH_3、HY样品的总交联密度;老化后,所有样品的总交联密度均变小。
The natural rubber prepared by NH3 and HY alone as control samples were compared with that was prepared by composite preservative HY/NH3. The effect of composite preservative HY/NH3 on the structure and processing properties and crosslinking density of natural rubber were studied by infrared spectrometer and rubber processing analyzer and nuclear magnetic resonance cross-linked density meter. The results show that the structure of raw rubber is not affected by HY/NH3. The largest elastic modulus（ G＇）and smallest loss factor（ tan δ） are owned by NY-1 and middle ones are owned by NY-3 in the strain and temperature scanning environment. The largest elastic modulus（ G＇） of and middle loss factor（ tan δ） are owned by NY-3 and the middle elastic modulus（ G＇） and largest loss factor（ tan δ） are owned by NY-1 in the frequency scanning environment. The smallest elastic modulus（ G＇） and largest loss factor（ tan δ） are owned by NY-2 in the three scanning environments. The total crosslink density of samples are prepared by composite preservative is less than the total crosslink density of samples are prepared by NH3 and HY alone before aging. The total crosslink density of all samples are decreased after aging.
作者
李建伟
栗秀萍
桂红星
丁丽
赵立广
李艺璇
黄红海
LI Jian-wei;LI Xiu-ping;GUI Hong-xing;DING Li;ZHAO Li-guang;LI Yi-xuan;HUANG Hong-hai(School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China;Institute of Rubber Research,Chinese Academy of Tropical Agricultural Sciences,Danzhou 571737,China)
出处
《应用化工》
CAS
CSCD
北大核心
2018年第5期937-940,944,共5页
Applied Chemical Industry
基金
农业部基金项目(CARS-34-GW9)
中国热带农业科学院基本科研业务费(1630022017023)
关键词
天然橡胶
加工性能
弹性模量
损耗因子
影响
natural rubber
processing properties
elastic modulu
loss factor
effect
