CAJ | 학술논문

以Bi2O3为阻燃协同剂，采用聚磷酸铵（APP）和双季戊四醇复配阻燃体系，制备了具有良好阻燃性能的膨胀阻燃聚丙烯（PP）。Bi2O3的用量为0.10?phr时，膨胀阻燃PP的极限氧指数达25.2%，拉伸强度达28.2?MPa。Bi2O3使APP的热失重速率明显降低，高温质量保持率显著提高；高温时，Bi2O3与APP分解产生的多聚磷酸发生反应，形成Bi-O-P，提高了多聚磷酸的热稳定性。研究表明：燃烧过程中Bi2O3与APP相互作用，生成Bi的磷酸盐，抑制了多聚磷酸分解产生P2O5，使更多的多聚磷酸参与酯化反应，促进体系燃烧成炭，从而形成更加致密的膨胀炭层，提高PP阻燃性能。
이Bi2O3위조연협동제，채용취린산안（APP）화쌍계무사순복배조연체계，제비료구유량호조연성능적팽창조연취병희（PP）。Bi2O3적용량위0.10?phr시，팽창조연PP적겁한양지수체25.2%，랍신강도체28.2?MPa。Bi2O3사APP적열실중속솔명현강저，고온질량보지솔현저제고；고온시，Bi2O3여APP분해산생적다취린산발생반응，형성Bi-O-P，제고료다취린산적열은정성。연구표명：연소과정중Bi2O3여APP상호작용，생성Bi적린산염，억제료다취린산분해산생P2O5，사경다적다취린산삼여지화반응，촉진체계연소성탄，종이형성경가치밀적팽창탄층，제고PP조연성능。
The?intumescent?flame?retardant?polypropylene(PP)?with?excellent?flame?retardancy?was?pre-pared?by?using?Bi2O3?as?synergist?in?the?flame?retardant?system?consisted?of?ammonium?polyphosphate?(APP)?and?di-pentaerythritol.?The?intumescent?flame?retardant?PP?had?limited?oxygen?index?and?tensile?strength?up?to?25.2%?and?28.2?MPa,?respectively?when?the?content?of?Bi2O3?was?0.1?phr.?Adding?Bi2O3?obviously?decreased?the?mass?loss?rate?of?APP?and?significantly?enhanced?the?mass?retention?rate?of?APP?at?high?temperature.?At?high?temperature,?Bi2O3?could?react?with?polysphosphorus?acid?decomposed?from?APP?to?form?Bi-O-P,?which?in-creased?the?thermal?stability?of?polysphosphorus?acid.?The?study?indicates?that?the?interaction?of?Bi2O3?and?APP?during?combustion?generates?bismuth?phosphate?and?inhibits?polyphosphorus?acid?to?decompose?to?produce?P2O5,?and?thus?more?polyphosphorus?acid?will?be?available?for?esterification?reaction?and?for?char?formation.?Conse-quently,?more?compact?intumescent?char?layer?are?formed?and?the?flame?retardancy?of?PP?is?improved.