聚偏氟乙烯(PVDF)是一种半晶态铁电聚合物, 目前，已测得PVDF的晶型有5种。相、β相、γ相、ε
相及ρ相。各种晶体结构的生成取决于加工条件，在一定条件(如拉伸、极化、浇注等处理方法)下，这些晶相
之间可以互相转变。α相是5种晶型中能量低，稳定的结构，PVDF由液态缓慢冷却或由溶液流延形成薄
膜时，通常都形成α相。经过拉伸、电极化后形成的日相PVDF显示出强的压电、热释电性质。PVDF具有较
宽的工作温度范围，其体电阻高、质量轻、柔顺性好，且机械强度高、频响宽。
Arkema Group KYNAR® 9000 HD Polyvinylidene Fluoride - Injection Molding
Polyvinylidinefluoride (PVDF), Molded/Extruded
Arkema
产品说明：
Characteristics: Natural resin - translucent, off-white hemispheres. High stability in harsh thermal, chemical and ultraviolet environments. High toughness and mechanical strength, low permeability, abrasion resistance; high purity
Applications:
Chemical processing – production, storage and transfer of corrosive fluids
Electronics – protective sheathing, plenum and wiring insulation
Semi-conductor industry
Food stuff and Healthcare industries
Transportation – fuel line and pipe, thermoformed body components
Information provided by Arkema Inc.
物性信息：
| 体积密度 | 0.961 g/cc | 0.0347 lb/in³ | |
| 粘度 | 500000 - 800000 cP @Shear Rate 100 1/s, Temperature 232 °C | 500000 - 800000 cP @Shear Rate 100 1/s, Temperature 450 °F | Melt Viscosity; ASTM D3835 |
| 熔体流动速率 | 16 - 40 g/10 min @Load 5.00 kg, Temperature 232 °C | 16 - 40 g/10 min @Load 11.0 lb, Temperature 450 °F | ASTM D1238 |
| 熔融温度 | 165 - 172 °C | 329 - 342 °F |
| 料筒后部温度 | 190 - 210 °C | 374 - 410 °F | Injection Molding |
| 料筒中部温度 | 200 - 220 °C | 392 - 428 °F | Injection Molding |
| 料筒前部温度 | 200 - 240 °C | 392 - 464 °F | Injection Molding |
| 射嘴温度 | 200 - 240 °C | 392 - 464 °F | Injection Molding |
| 模具温度 | 50.0 - 90.0 °C | 122 - 194 °F | Injection Molding |