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不同地域天然橡胶的结构与性能对比

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  • Key Words:不同地域天然橡胶;微观结构;结晶性能;熔融;自补强性能

  • Abstract:以4种不同地域天然橡胶为目标样品,利用DSC、FT-IR和ARES流变仪等分析手段,分析了目标样品微观结构与结晶性能差异。结果表明,4种天然橡胶的零切粘度(η0)大小顺序为SIR>SMR>STR>SCR,其相对分子质量大小顺序为SIR>SMR>STR>SCR。4种不同地域天然橡胶分子链具有不同的CH3/CH2基团数量,相应的3,4异构体含量大小顺序为STR>SIR>SMR>SCR。4种天然橡胶在-25℃下等温结晶后的熔融曲线呈现明显的双峰结构,具有α和β2种晶型结构,结晶度大小顺序为SMR>SIR>SCR>STR,结晶速度大小顺序为SIR>SMR>SCR>STR,自补强性能大小顺序为SCR>SMR>SIR>STR,SMR和SCR的玻璃化转变温度高于SIR和STR。

  • Volume:v.40;No.235

  • Issue:01

  • Translation or Not:no

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