Overview
Internal plasticizers are chemically bonded to polymer matrices, unlike traditional external plasticizers that migrate over time. They are copolymerized or grafted into chains, ensuring permanent flexibility. Widely used in polyvinyl chloride (PVC) and synthetic rubbers, they address leaching and evaporation issues common with phthalate-based alternatives. These additives are favored in applications requiring long-term durability, such as medical devices and automotive components. Their molecular integration eliminates the need for frequent re-plasticization, reducing lifecycle costs. Major types include epoxidized oils, polymeric esters, and citrates, each tailored for specific polymer systems.
Physical and Chemical Properties
Internal plasticizers exhibit low volatility due to their covalent bonding with polymers, ensuring stability at high temperatures (up to 180°C). Their viscosity ranges from 500–5,000 cP at 25°C, depending on molecular structure. Unlike migratory plasticizers, they retain elasticity even after prolonged UV exposure or chemical contact. Key advantages include hydrolytic resistance and compatibility with polar polymers. For example, epoxidized soybean oil-based variants improve PVC’s cold flexibility without compromising tensile strength. Analytical methods like FTIR and DSC confirm their integration into polymer networks.
Main Applications
In PVC applications, internal plasticizers dominate flexible films, blood bags, and food packaging due to their non-toxic profile. Automotive sealants and hoses utilize them for resistance to engine oils and temperature fluctuations. They also enhance the dielectric properties of wire coatings. The construction sector employs them in weather-resistant membranes and flooring materials. Recent innovations include bio-based internal plasticizers for sustainable packaging, meeting EU REACH and FDA regulations. Niche uses cover 3D printing filaments and biodegradable plastics.
Safety and Storage
Most internal plasticizers are classified as non-hazardous under OSHA standards. However, powder forms may cause respiratory irritation; PPE like N95 masks is recommended during handling. Storage requires dry conditions (<30% humidity) at 15–25°C to prevent pre-polymerization. Disposal should follow local regulations for synthetic polymers. Spills can be absorbed with inert materials like vermiculite. Manufacturers provide SDS sheets detailing first-aid measures for accidental exposure, though risks are minimal compared to phthalates.
B2B Procurement Guide
Bulk buyers should prioritize suppliers with ISO 9001 certification and batch-wise quality reports. Key specifications to evaluate include migration resistance (tested via ISO 177) and glass transition temperature (Tg) reduction efficiency. MOQs typically start at 1 metric ton, with discounts for annual contracts. Sample testing is critical—request 500g batches to assess compatibility with your polymer blend. Logistics considerations include drum (200kg) or IBC (1,000kg) options; some vendors offer just-in-time delivery to reduce inventory costs. Preferred payment terms are LC or 30-day credit for established buyers.
Related Manufacturers
- 主营：酸度调节剂、金属清洗剂、液体氯化锌、增塑剂、n甲基吡咯烷酮
- 主营：四氢噻吩、二甲基亚砜、二甲基二硫醚、内增塑剂粘合剂、乙酰氯、氢氟酸、二甲苯、甲酰胺、丙烯腈、正丙醇、水杨酸、甲酸钠、正丙醛、苯甲醛、丙二腈、二甲基硫醚、硬脂酸、石油醚、水合肼、氯乙酸、乙二醛、乙二醇、异戊烷、苯乙烯、仲丁胺、叔丁醇
- 主营：增塑剂、聚苯胺、脯氨酸甲酯盐酸盐、苄基三甲基氯化铵
- 主营：聚丙烯酰胺、聚合氯化铝、片碱、增塑剂、纯碱、硫酸亚铁、磷酸、元明粉、乙二醇、工业盐、次氯酸钠
- 主营：苯乙烯、甲基丙烯酸缩水甘油酯GMA、醋酸乙烯、增塑剂、甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸羟乙酯、丙烯酸异辛酯、甲基丙烯酸、丙烯酸乙酯、甲基丙烯酸酐、丙烯酸甲酯、甲基丙烯酸羟乙酯
- 主营：二乙二醇丁醚、二甲基乙酰胺、碳酸二甲酯、增塑剂、顺酐、溶剂油、乙二醇二醋酸酯、丙二醇二醋酸酯、邻苯二甲酸二辛酯、N-甲基吡咯烷酮
- 主营：阻燃剂、催化剂、水杨酸、增塑剂、二苯基、酰亚胺、正磷酸、烟酰胺、曲酸粉、氯化锌、异丙醇、化妆品、初油酸、脂肪醇、生石灰、甲基异、碳酸锌、碳酸锂、活性炭、乙二胺、三氮唑、着色剂、环己酮、防冻液、抗氧剂、亚磷酸
- 主营：氯化锌、玻璃粉、冰醋酸、增塑剂、茶皂素、甘氨酸、渗透剂、棕榈酸、氯化钾、靛蓝粉、磷酸钙、eva乳液、氟化钾、堵漏王、早强剂、三甘醇、亚油酸、木质素、氟化钠、铵明矾、pvc树脂、富马酸、白糊精、壳聚糖、苯丙乳液、三乙二醇
- 主营：UV单体、阻燃剂、光引发剂、增塑剂、生物化工中间体
- 主营：丙烯酸单体、全氟三丁胺、甲基丙烯酸十八酯、增塑剂、乙二醇二缩水甘油醚、催化剂、催干剂、环氧稀释剂、偶联剂、交联剂、橡胶塑料助剂、电镀电子科技材料、丙烯酸酯类
- 主营：蛋白栋、DOP、玻璃粉、增塑剂、福美钠、黄糊精、硫酸钡、漂白粉、漂粉精、强氯精、优氯净、早强剂
- 主营：异辛醇、乳化剂、乙烯醚、增塑剂、醚羧酸、脂肪醇、分散剂、染色助剂、聚乙二醇、异构醇醚、泊洛沙姆、椰油酰胺、基羟乙基、烷基糖苷、特辛基酚、聚氧乙烯、嵌段聚醚、单油酸酯、异构十三醇、丙烯磺酸钠、氢化蓖麻油、丙烯酰胺基、醇醚葡糖苷、低泡渗透剂、甲酯乙氧基、癸基葡糖苷
- 主营：防冻液、冰醋酸、乙二醇、增塑剂、冰乙酸、纯吡啶、丙二醇、羟基苯、14丁二醇、3-丙三醇、四氢呋喃、环保乙腈、化工苯酚、1.4丁二醇、医用苯酚、工业苯酚、精制苯酚、价位四氢、乙腈工业、乙酸乙酯、吡啶化工、甲酸乙酯、吡啶工业、求购苯酚、高纯三氯、实验乙腈
- 主营：全氟三丁胺、二苄叉山梨醇、六氟丙烯二聚体、增塑剂、六氟环氧丙烷二聚体、异丙醇铝、纳米勃姆石、二异戊基硫醚、隐色结晶紫、邻菲罗啉
- 主营：十六烷基三甲基溴化铵、十二烷基甜菜咸、乳化剂、增塑剂、亚磷酸三丁酯、棕榈油、钛酸四丁酯、钛酸四乙酯