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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. shu

Torque Rheological Property of PVC/PHMS in Reactive Processing

1.
Faculty of Chemistry & Material Science, Hubei University, Wuhan 430062

Corresponding author: HUANG Shi-Qiang,
Received Date: 26 November 2001
Available Online: 4 May 2002

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(TQ_max) of PVC. On increasing the 206^#PHMS amount, the equilibrium torque(TQ_eq) of PVC increased slightly and passed through a maximum at 0.2 phr of 206^#PHMS. In contrast, the TQ_eq 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(T_eq) of PVC increased firstly and then decreased. PHMS was able to decrease not only the total energy(TTQ_eq) consumed in the reactive processing but also the consumption rate of energy in the initial period of the reactive processing.
- poly(hydromethylsiloxane),
- polyvinyl chloride,
- reactive processing,
- torque rheological property
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