采用静态浇铸法制备了单体浇铸尼龙(MC尼龙),使用智能巡检仪对聚合过程热效应引起的温度变化进行了采集,对比了催化剂用量对聚合热效应的影响,并对温度-时间曲线进行了拟合。结果表明,温度变化曲线呈明显的S状,根据斜率变化可分为三个阶段,其中最高聚合温度约199℃,最大温升约55℃;催化剂用量增加对提高聚合速率表现出先快后慢的趋势;运用Boltzmann函数拟合MC尼龙聚合过程温度变化优度较高。
Monomer casting(MC) nylon was prepared using static casting method,and the temperature variations caused by the thermal effects of polymerization were gathered by intelligent recording machine.Then the influences of content of initiator on the thermal effects of polymerization were compared.The results demonstrated that the temperature variation curve shown a S-shape clearly,and could be divided into three stages by the slope differences.The final temperature of polymerization was about 199℃.The maximum temperature change of polymerization was about 55℃.Polymerization could be accelerated by increasing content of initiator,but this acceleration effect became weakened in higher content.Boltzmann function showed a good performance in fitting temperature variations of MC nylon polymerization.
[1] 邓如生,魏运方,陈步宁.聚酰胺树脂及其应用[M].北京:化学工业出版社,2002.
[2] 孙向东.MC尼龙的合成、改性研究[D].沈阳:东北大学,2006.
[3] Hem R E,Chan H E,Leonard D T,et al.Bimodal fiber diameter distributed graphene oxide/nylon-6 composite nanofibrous mats via electrospinning[J].Colloids and Surfaces A:Physicochem.Eng.Aspects,2012,407:121-125.
[4] 杨海洋,郑梯和,刘爱学.阴离子聚合尼龙6的改性研究进展[J].化工新型材料,2010,38(5):45-47,52.
[5] Wei Z,Les J,S Ravi P S,et al.The effect of plasma modification on the sheet resistance of nylon fabrics coated with carbon nanotubes[J].Applied Surface Science,2012,258:8209-8213.
[6] 杨桂生,卢凤才.催化剂用量对MC尼龙合成、形态与性能的影响[J].高分子学报,1992(1):15-22.
[7] 冯德才,杨其,白燕超,等.引发剂和活化剂用量对MC尼龙性能的影响[J].塑料科技,2006,34(4):18-22.
[8] 孙向东,孙旭东,张慧波,等.MC尼龙制备工艺中存在的问题及解决方案[J].工程塑料应用,2003,31(12):69-71.
[9] 程晓春,固旭,张强华.共聚改性MC尼龙的制备与DSC分析[J].应用化工,2005,34(5):282-284.
[10] 蔡力峰,林志勇.DSC法研究纳米SiO2/MC尼龙6原位复合材料的多重熔融行为[J].塑料,2010,39(3):88-90.
[11] 张士华.MC尼龙复合改性与梯度复合管制备[D].南京:南京理工大学,2013.
[12] 陈绮虹,林轩,周红军.MC尼龙/Dy2O3纳米复合材料非等温结晶动力学[J].工程塑料应用,2009,37(12):61-64.
[13] 张军亮,刘新平.广义S形曲线及其非线性回归分析[J].纺织高校基础科学学报,2003,16(2):130-133.
