引用本文:
黄世强, 卿胜波, 朱杰, 肖汉文. 反应加工体系PVC/PHMS的转矩流变性能研究(Ⅰ)[J]. 应用化学,
2002, 19(8): 772-775.
Citation: HUANG Shi-Qiang, QING Sheng-Bo, ZHU Jie, XIAO Han-Wen. Torque Rheological Property of PVC/PHMS in Reactive Processing[J]. Chinese Journal of Applied Chemistry, 2002, 19(8): 772-775.
Citation: HUANG Shi-Qiang, QING Sheng-Bo, ZHU Jie, XIAO Han-Wen. Torque Rheological Property of PVC/PHMS in Reactive Processing[J]. Chinese Journal of Applied Chemistry, 2002, 19(8): 772-775.
反应加工体系PVC/PHMS的转矩流变性能研究(Ⅰ)
摘要:
含氢聚甲基硅氧烷(PHMS)与聚氯乙烯(PVC)在密炼机中反应加工后,通过FT-IR等方法证明有新的Si-C键形成。高含氢和低含氢聚甲基硅氧烷(分别为202#PHMS和206#PHMS)均可使PVC的最大转矩值(TQmax)有不同程度的降低。PVC的平衡转矩值(TQeq)随着206#PHMS量的增加呈现先略有增加然后下降的趋势;而随202#PHMS量的增加而增加,并且PVC的凝胶-熔融时间比加入等量206#PHMS时要短。随着2种PHMS量的增加,物料温度在温度最低点之后的上升速度减慢,而且平衡物料温度(Teq)先增加后下降。此外,PHMS不仅使PVC熔融塑化的总能耗(TTQeq)减小,而且使PVC密炼开始阶段能量的消耗速度减慢。
English
Torque Rheological Property of PVC/PHMS in Reactive Processing
Abstract:
Polyvinyl chloride(PVC) was chemically modified with polyhydromethylsiloxane(PHMS) via reactive processing in a Haake Rheomix 600P mixing mill. Two kinds of PHMS with different contents of Si-H (202#PHMS and 206#PHMS) were used to reduce the maximum torque(TQmax) of PVC. On increasing the 206#PHMS amount, the equilibrium torque(TQeq) of PVC increased slightly and passed through a maximum at 0.2 phr of 206#PHMS. In contrast, the TQeq of PVC modified with 202# PHMS increased continuously with increase in 202# PHMS content. Furthermore, the gelating-melting time for PVC modified with 202# PHMS was shorter than that for PVC with 206# PHMS. With addition of PHMS the equilibrium temperature(Teq) of PVC increased firstly and then decreased. PHMS was able to decrease not only the total energy(TTQeq) consumed in the reactive processing but also the consumption rate of energy in the initial period of the reactive processing.
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