Overview
Polymerization initiators are specialized chemicals that generate free radicals or ions to start chain-growth polymerization reactions. They are critical in producing polymers for plastics, synthetic rubbers, and coatings. Common types include organic peroxides (e.g., benzoyl peroxide) and azo compounds (e.g., AIBN). These initiators are selected based on their decomposition temperature and radical generation efficiency. The choice significantly affects polymerization rate, molecular weight distribution, and final product properties. Proper handling is essential due to their reactive nature and potential hazards.
Physical and Chemical Properties
Polymerization initiators typically exhibit low thermal stability, decomposing at moderate temperatures to form reactive free radicals. Their half-life—the time required for half the initiator to decompose—is a key parameter, often measured at specific temperatures (e.g., AIBN's 10-hour half-life at 65°C). Many initiators are sensitive to light, heat, and friction, requiring careful handling. Solubility varies: some are oil-soluble (e.g., lauroyl peroxide), while others are water-soluble (e.g., potassium persulfate). Their molecular weights range from ~100-300 g/mol, with decomposition products often including gases like nitrogen.
Main Applications
In industrial polymer production, initiators are used for manufacturing polyvinyl chloride (PVC), polystyrene, polyethylene, and acrylics. They enable controlled polymerization in processes like bulk, suspension, or emulsion polymerization. Beyond plastics, they're essential for producing adhesives, sealants, and composite materials. Specialty applications include dental resins and photopolymer printing inks. The choice of initiator affects product clarity, strength, and processing characteristics.
Safety and Storage
Polymerization initiators are classified as hazardous materials due to explosion risks and thermal instability. Many require refrigeration (2-8°C) and desiccants to prevent degradation. Containers must be vented to avoid pressure buildup from decomposition gases. Safety protocols include using non-sparking tools, grounding equipment, and avoiding contamination with metals or amines that may accelerate decomposition. Fire suppression systems should use CO₂ or dry chemical agents—never water for organic peroxide fires.
B2B Procurement Guide
When sourcing polymerization initiators, verify the supplier's certifications (e.g., ISO 9001) and request batch-specific Certificates of Analysis. Key parameters to specify include purity (typically 98-99%), active oxygen content (for peroxides), and inhibitor content. Consider logistics: some initiators require temperature-controlled shipping. Minimum order quantities often apply (e.g., 25kg drums). For large-scale buyers, contract manufacturing arrangements may offer cost advantages. Always review Safety Data Sheets (SDS) before procurement.
Related Manufacturers
- 主营：甲基丙烯酸十二酯、甲基丙烯酸十六酯、甲基丙烯酸十八酯、V50引发剂、丙烯酸十二酯、丙烯酸十六酯、丙烯酸十八酯、偶氮二异丁咪唑啉盐酸盐、N-乙酰己内酰胺、硅烷偶联剂、双马来酰亚胺、马来酸酯、缩水甘油酯、缩水甘油醚、甲基咪唑、N-异丙基丙烯酰胺、金属萃取剂
- 主营：固化剂、表面处理剂、无机矿物颜填料、光引发剂4215、氨基硅烷偶联剂
- 主营：杀菌剂、220140-29-4、氯化偏苯三酸酐、葫芦[5]脲、印染助剂、葫芦[8]脲、二苯基甘脲、葫芦脲水合物、草酰氯单甲酯、生物医药葫芦脲、四甲氧甲基甘脲、均苯四甲酸
- 主营：浮锡灵、铜萃取剂、氧化石蜡皂、光引发剂、铜矿活化剂、硫化锡矿石、苯乙烯膦酸、稀土矿捕收剂、锡石细泥捕收剂、表面活性剂、美狄兰捕收剂、中间体、橡胶助剂、uv助剂
- 主营：黄丹粉、707乳液、棕榈酸、引发剂、防腐剂、苯丙乳液、磷脂三苯、丙烯酸酯、叉二磷酸、多聚化学、硬脂酸铝、二甲戊灵、防静电剂、茉莉酮酸、氨基丁酸、对碘甲苯、硫酸亚铁、甲基硅油、磷酸二氢钠、密封固化剂、种子润滑剂、碱性蛋白酶、对氟苯甲醛、硬脂酸甘油酯、丙烯酸乙二醇、甲基二乙醇胺
- 主营：阻燃剂、催化剂、洗涤剂、硫酸铵、醋酸镧、起泡剂、清洗剂、碳酸钙、抗氧剂、灭火剂、交联剂、粘合剂、封头剂、丙二醇、酸二氢铝、聚乙烯醇、对氯溴苯、生物试剂、息香乙醚、异戊二醇、香精香料、4-丁二醇、2-氯丙烯腈、2-己基癸酸、二甲胺硼烷
- 主营：硫化铵、氧化石蜡皂、选矿药剂、表面活性剂、乳化剂、捕收剂、萃取剂、阻燃剂
- 主营：偶联剂、油漆涂料、生产用助催化剂
- 主营：软水盐、五水偏硅酸钠、三氯化铁、过硫酸钠、硫化钠、硫酸氢钠、氨基磺酸、磷酸三钠、二氧化硫脲、冰醋酸、甲酸、氟化氢铵
- 主营：次氯酸钠、铝溶胶、乙二醇、偶氮引发剂、甲基硅酸、三乙醇胺、二甲基亚砜、液体泡花碱、液碱、氢氧化钠、蒸馏水去离子水、二氯甲烷、软水盐、DMF、二甲基甲酰胺、聚乙二醇200、400、600、水玻璃、乙醇、甲酸、草酸、大苏打、冰醋酸、苯酚、氨水
- 主营：苯甲醇、抗冻剂、丙三醇、润滑剂、叶面肥、慢干溶剂、二甲基亚砜、二甲基乙酰胺、十二水硫酸铝钾
- 主营：碳酸二甲酯、醋酸甲酯、醋酸乙酯、醋酸丁酯、二甲苯、二氯甲烷、二氯乙烷、环己酮、异丙醇、二甲基甲酰胺、正丁醇、甲基环己烷、溶剂油、航空煤油、一乙醇胺、二乙醇胺、醋酸异丙酯、苯酚、乙醇、甲缩醛、辛醇、正己烷、正庚烷、环己烷
- 主营：润滑油、氯化铵、磷酸二氢钾、白油、减水剂、氯化钾、乙二醇、柠檬酸、辛醇
- 主营：碳酸丙烯酯、乙二醇二醋酸酯、油漆油墨稀释剂
- 主营：正辛烷、偶氮二异丁腈、二甲基亚砜、聚合引发剂、聚磷酸铵、二氧化硒、甲醇钠、聚乙烯吡洛烷酮、叔丁醇、对苯二胺、邻苯二胺、香精、间苯二胺
- 主营：桐油
- 主营：增塑剂、二甲基亚砜、顺酐、环丁砜、二甲基二硫醚、赋臭剂、四氢噻吩加臭剂、环戊烷、塑化剂、二辛酯、石油醚、异丁醇、氯化苄、叔十二硫醇、硬脂酸钙、树脂涂料、四氢噻吩、化学试剂、国标染料、氯乙酸、硬脂酸锌、乙二醛、异辛烷、橡胶塑料
- 主营：乙二醇、戊二醛、环己酮、异丙醇、二甲苯、安息油、清洗剂、正丁醇、醋酸丁酯、二氯丙烷、三氯乙烯、醋酸甲酯、无水乙醇、二氯甲烷、二氯乙烷、环保溶剂、金属洗涤剂、醋酸仲丁酯、涂料稀释剂、碳酸二甲酯、油墨稀释剂、环保化工溶剂、无色透明液体
- 主营：杀菌剂、防冻液、安息油、催化剂引发剂、丙烯酸、胶黏剂、增湿剂、邻苯二甲、涂料溶剂、涂料助剂、环氧丙烷、油漆溶剂、单斜晶体、防水涂料、汽油添加剂、油漆清洗剂、乙二醇乙醚、溶剂防锈剂、涂料稀释剂、树脂增塑剂、酒精变性剂、甘油三酸酯、环保增塑剂、橡胶涂料清漆、无色透明液体、二甲基甲酰胺
- 主营：乙二醇、磷酸、环己酮、聚合引发剂有机合成、航空煤油、异丙醇、乙醇、一乙醇胺、二乙醇胺、二甲基亚砜、溶剂油、苯甲醇、二价酸酯、石油醚、一乙胺、二乙胺、亚磷酸二甲酯、二甲基乙酰胺(DMAC)、二甲基甲酰胺(DMF)、正己烷、环己烷、丙烯酸、甘油、二甲苯、正庚烷、环氧氯丙烷
- 主营：红丹粉、无味煤油、对苯二酚、引发剂、环氧树脂、防水乳液、沥青乳液、生物培养基、地坪固化剂、生长调节剂、铁锈转化剂、建筑胶粘剂、亚铁氰化钠、磷酸三丁酯、树脂稀释剂、酵母提取物、苄氨基嘌呤、枯草芽孢杆菌、防水涂料乳液、丁苯乳液、聚丙烯酸酯乳液、黄血盐钾、偶氮二异丁腈、十二烷基硫酸钠、蛋白胨、酵母膏