摘要
针对C9石油树脂用作包覆材料时存在软化温度与残炭率低的问题,选用甲基磺酸(MSA)为质子酸催化剂,1,4-苯二甲醇(PXG)为交联剂,对石油树脂进行交联改性。考察了反应温度、PXG用量(PXG占石油树脂的质量分数)、MSA用量(MSA占石油树脂的质量分数)对改性石油树脂软化温度与残炭率的影响,利用傅里叶变换红外光谱、凝胶渗透色谱、热重分析和扫描电子显微镜等对改性树脂进行表征。结果表明,最佳工艺条件为:反应温度220℃,PXG用量9%(w),MSA用量7%(w)。在此工艺条件下,改性石油树脂软化温度可提升到115.9℃,残炭率达19.84%(w),与改性前相比,改性石油树脂重均分子量、热稳定性均明显提升。
Methanesulfonic acid(MSA)was selected as proton acid catalyst and 1,4-benzenedimethanol(PXG)as crosslinking agent for crosslinking modification of C9 petroleum resin which was used as coating material existing the problems of low softening point and low carbon residue yield.The effects of reaction temperature,the amount of PXG and MSA(PXG and MSA accout for the mass fraction of petroleum resin)on the softening point and carbon residue yield of the modified resin were investigated.The modified resin was characterized by Fourier transform infrared spectroscopy,gel permeation chromatograph,thermogravimetrric analysis and scanning electron microscope.The results show that the optimum process conditions are as follows:the reaction temperature is 220℃,the mass fraction of PXG and MSA are 9% and 7%,respectively.The softening point of the modified resin is increased to 115.9℃ and the carbon residue yield can reach 19.84%(w)under the conditions.The weight average molecular weight and thermal stability of the modified resin are significantly improved than those of the unmodified resin.
作者
余涛
侯文杰
施云海
李天余
Yu Tao;Hou Wenjie;Shi Yunhai;Li Tianyu(Institute of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;Baowu Carbon Technology Co.,Ltd.,Shanghai 201999,China)
出处
《合成树脂及塑料》
CAS
北大核心
2024年第5期1-5,共5页
China Synthetic Resin and Plastics
关键词
石油树脂
交联改性
1
4-苯二甲醇
甲基磺酸
软化温度
残炭率
petroleum resin
crosslinking modification
1,4-benzenedimethanol
methanesulfonic acid
softening point
carbon residue yield
