Shanghai Daoqin Plastics Co., Ltd.

         polyphenylene oxide (PPO) (PPE) resin as is large engineering plastics 之一, tool has good flame retardant property, high temperature resistance property, electrical insulation property, dimensional stability and excellent material force property can. PPE long use temperature degree scope/range is –127～121℃, in long negative lower tool has excellent dimensional stability and electrical insulation property, widely used in electronics electrical appliances industrial, automotive industrial, industrial machine and outer medical devices and other. PPE tool has processing properties 差, resistant impact property can and other disadvantages, is improvement its processing properties, research will PPE and polystyrene (PS) (PS), polyamide (PA) (PA), terephthalic acid ester (PBT) blending. blending modified improvement PPE processing properties, in 一定程 degree upper reduce its resistant temperature property and flame retardant property. product PPE modified material in 也经常 add flame retardant and other improvement its flame retardant property can.

         light amount 化, more function 化, processing process environmental protection formed is material processing industry rise grade development direction. polymer micro foaming material tool has dimensions is 1～10 µm, 且泡孔 distribution uniform structure. versus for/regarding foaming material and polymer foam material, polymer micro material tool has light 质, high strong/high, impact strong/high degree high, hot, dielectric constant low, heat stabilized property good and fatigue lifespan long and other advantages, in aviation aerospace light structure material, micro electronics 封装材 material, automotive industrial parts and insulation material and other high new technology field/area tool has important application value. is, micro foaming structure in material in a large amount of has gas micro 孔孔洞, this increase polymer material in 燃烧时 and gas 接触面积, therefore reduce material flame retardant property can.

         China 科学院宁波材 material technology and engineering research 翟文涛博士团队 selection types polystyrene (PS) (PS) modified polyphenylene oxide (PPO) product material (PPE 340Z, PPE 540Z), high pressure oxidation carbon is foaming agent, through solid foaming technology, made PPE micro foaming material. research this types material flame retardant property can, foaming property can, and PPE in foaming front rear flame retardant property can, micro structure, rate and other for PPE resin flame retardant property can effect/influence.

        PPE foaming material made 备

         will PPE 340Z(PPE and PS ratio/proportion is 9∶5), PPE 540Z(PPE and PS ratio/proportion is 14∶5) resin pellets in 100℃ drying 3 h, using/adopting sheet/plate machine for PPE进行 pressure sheet/slice, temperature degree is 250℃, pressure is 10 MPa, holding pressure time is 6 min, made Sample.

         will upper made PPE sheet/slice high pressure in, using/adopting oxidation carbon is foaming agent saturated and, pressure is 4 MPa, saturated and time is 12 h. pressure rear fast speed from high pressure in sample, 并放入 different temperature degree (120～180℃) in foaming, foaming time is 20 s. sample rear, according to related testing standards made formed standards Sample.

        PPE foaming is

        PPE 340Z and PPE 540Z micro foaming material 膨胀倍 rate foaming temperature degree rise temperature 而逐渐 rise high, to most large 膨胀倍 rate rear reduce.

        PPE flame retardant is

        PPE 540Z ratio PPE 340Z resin tool has relatively high LOI value, micro foaming rear, for/regarding versus 似 膨胀倍 rate micro foaming material, PPE 540Z也 has versus for relatively high LOI value. for/regarding types PPE micro foaming material, its 膨胀倍 rate is how much, process in has generate phenomenon.

        PPE force property can

        无论 foaming and 否, PPE 540Z force property can excellent 于PPE 340Z. 随 膨胀倍 rate improve/increase, PPE340Z and PPE540Z tensile elastic property modulus and tensile strength 都逐渐 reduce. PPE 540Z in 膨胀倍 rate is 4.5时, ratio strong/high degree is 67.5 MPa/(g/cm3), excellent foaming material.

        经 analysis can 看出, high pressure oxidation carbon is foaming agent, using/adopting solid foaming technology made 备 两 types PPE micro foaming material.

        无论材 material foaming and 否, PPE 540Z flame retardant property can excellent 于PPE 340Z, 随 膨胀倍 rate improve/increase, foaming material flame retardant property can 也逐渐 reduce, important is, process in generate 熔滴, this 也说明 PPE is very good formed agent.

        随 膨胀倍 rate improve/increase, PPE micro foaming material force property can reduce, 但PPE 540Z micro foaming material ratio strong/high degree in 膨胀倍 rate is 4.5时 excellent foaming material. good force property can wide material application areas.

        该文章 is 国家自然科学基金 project, 广东省佛山市 high 明区科技 innovation project. 摘自《 engineering plastics application 》2018 year 第11期115-120页 China 科学院宁波材 material technology and engineering research 翟文涛博士, 李蝶, 黄朋科 and other inner 容. doi:10.3969/j.issn.1001-3539.2018.11.024