• 专利标题:   Production of poly(vinyl chloride)/poly(vinyl acetate) nanocomposite used in e.g. electronic application, involves preparing premix using graphene nanofiller and polytetrafluoroethylene mold, mixing with poly(vinyl chloride), and processing.
  • 专利号:   PL431108-A1
  • 发明人:   WILCZEWSKI S, SKORCZEWSKA K, LEWANDOWSKI K, TOMASZEWSKA J
  • 专利权人:   UNIV TECHNOLOGICZNOPRZYRODNICZY IM JANA
  • 国际专利分类:   C08J003/28, C08J005/00, C08K003/04, C08K007/00, C08L027/06, C08L031/04
  • 专利详细信息:   PL431108-A1 22 Mar 2021 C08J-005/00 202152 Pages: 1
  • 申请详细信息:   PL431108-A1 PL431108 10 Sep 2019
  • 优先权号:   PL431108

▎ 摘  要

NOVELTY - Production of poly(vinyl chloride)/poly(vinyl acetate) nanocomposite involves dispersing 0.1-3 g nanofiller such as carbon nanotubes and graphene in 100 g vinyl acetate for 15 minutes to 1 hour to obtain a mixture of vinyl acetate and carbon nanofiller, intensively stirring the mixture while adding 0.1-1.5 initiator in the form of organic peroxide soluble in vinyl acetate, preferably benzoyl peroxide to the mixture, heating to 55-70 degrees C, pouring the reaction mixture into a flat mold, preferably Teflon (RTM: polytetrafluoroethylene) or silicone, evaporating unreacted reaction substrates to obtain a polyvinyl acetate sheet with carbon nanofiller, cooling the sheet to at least 30 degrees C, grinding to a particle size of 250 mu m to obtain a premix, mixing the premix with poly(vinyl chloride) suspension together with other known processing additives, and processing at a maximum processing temperature of 170-200 degrees C to obtain the nanocomposite containing 0.004-2 wt.% carbon nanofiller. USE - Production of poly(vinyl chloride)/poly(vinyl acetate) nanocomposite used in construction application, mechanical application, electronic application, energy application, medicine application, and chemical industry. DETAILED DESCRIPTION - Production of poly(vinyl chloride)/poly(vinyl acetate) nanocomposite involves dispersing 0.1-3 g nanofiller such as carbon nanotubes and graphene by means of ultrasound with a frequency of 20-30 kHz and an amplitude of 35-200 mu m in 100 g vinyl acetate for 15 minutes to 1 hour while diaphragm cooling to 30 degrees C to obtain a mixture of vinyl acetate and carbon nanofiller, placing the mixture in a reactor equipped with a high-performance mechanical stirrer and a reflux condenser, intensively stirring while adding 0.1-1.5 initiator in the form of organic peroxide soluble in vinyl acetate, preferably benzoyl peroxide to the mixture for every 100 g vinyl acetate, maintaining the temperature of the mixture to less than 30 degrees C until the initiator is completely dissolved, heating to 55-70 degrees C at a rate of 5-10 degrees C/minute, maintaining for 15-60 minutes, pouring the reaction mixture into a flat mold, preferably Teflon (RTM: polytetrafluoroethylene) or silicone so that thickness of the mixture is 4 mm, placing the mold in a temperature chamber at 65-80 degrees C for a minimum of 12 hours under atmospheric pressure, and at 65-80 degrees C and a pressure of less than 20000 Pa for a minimum of 12 hours to evaporate the unreacted reaction substrates to obtain a polyvinyl acetate sheet with carbon nanofiller, cooling the sheet to at least 30 degrees C, grinding to a particle size of 250 mu m to obtain a premix, mixing 1-20 pts. wt. premix with 100 pts. wt. poly(vinyl chloride) suspension together with other known processing additives in traditional mixers intended for production of poly(vinyl chloride) blend, and processing by known processing methods depending on the poly(vinyl chloride) mixture and additives used at a maximum processing temperature of 170-200 degrees C to obtain the nanocomposite containing 0.004-2 wt.% carbon nanofiller.