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Study of Chlorinated Polyvinyl Chloride (CPVC) Strengthening and Toughening

Author: LiWenHui
Tutor: HuangChengYa
School: South China University of Technology
Course: Materials Science
Keywords: Chlorinated polyvinyl chloride Toughened and strengthened Rheological properties Heat resistance Thermal stability
CLC: TQ325.3
Type: Master's thesis
Year: 2010
Downloads: 121
Quote: 0
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Abstract


The papers by physical blending of chlorinated polyvinyl chloride (CPVC) modified to improve its processing performance, impact resistance, examine the various modifiers mechanical properties, processing performance, heat resistance and thermal stability excellent impact, to prepare a comprehensive performance of the CPVC resin. ADD CPE, NBR, MBS impact modifier, can significantly improve the impact properties of the CPVC resin, wherein, add 30 parts of MBS impact strength of the sample can be by 2.7kJ / m 2 improve to 49kJ / m 2 . The impact modifier, however, adversely affect the tensile and bending properties to the resin, wherein MBS less influence on the tensile bending performance. The impact properties of rigid particles of CPVC not improve. Inorganic rigid particles added, can increase the bending modulus of the resin. The CaCO 3 content increases, the CPVC flexural modulus significantly improved by the 0 copies 3.432GPa to 40 parts 4.490GPa. Elastomers and rigid particles synergy elastomer played toughening effect, rigid particles play an enhanced role in reducing elastomer tensile and bending properties. Among them, add 15 parts of NBR, and 10 parts of ABS sample impact strength of 66.5kJ / m 2 ; adding 15 parts of NBR with 15 parts of CaCO 3 sample impact strength was 44.2 kJ / m 2 . Add DOP or ACR as a processing aid, can significantly improve the processing performance of the CPVC. DOP and ACR is conducive to the promotion of CPVC plasticizing, reduce torque and improve the processing performance. Add 20 copies of ACR to balance torque resin can reduce 3.8 N · m the plasticized time 0.32min. NBR is conducive to reduce the torque of the CPVC resin, but the plasticization time is extended. Organic rigid particles (PVC, ABS) helps to improve the processing performance of CPVC, but little improvement; rigid inorganic particles (CaCO 3 , MMT), the processing properties of CPVC worse. Add 20 parts of MMT resin increase in the maximum torque 15.3N · m, equilibrium torque to increase 6.1N · m. The varying degrees of the organic modifier will reduce the heat resistance of the CPVC. NBR impact on the heat resistance of the CPVC, add 30 parts of NBR sample Vicat softening temperature 49 ° C lower than the absence of the sample. Inorganic rigid particles can improve the heat resistance of the CPVC, add 30 parts of CaCO 3 enables CPVC Vicat softening temperature by 9.7 ° C, and add 30 parts of montmorillonite allows CPVC Vicat softening temperature increased by 15.8 ℃ . Rigid inorganic particles can effectively raise the the CPVC heat aging stability. Add 30 parts of CaCO 3 , respectively, than the absence of the sample to improve 20min and 27.5min and add 30 montmorillonite sample thermal aging stability.

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CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polymer resin and plastic > PVC and plastic
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