摘要
对新型聚烯烃弹性体Vistamaxx进行了差示扫描热（DSC）、核磁共振（NMR）分析，结果表明：弹性体Vistamaxxr的软化点较低，熔点与聚丙烯接近，主要由等规丙烯组成，其中含有少量聚乙烯，这些乙烯单元的存在破坏了原有丙烯单元的结晶，使其具有较好的弹性，以Vistamaxxr为芯层、丙烯为皮层，采用熔融纺丝工艺制备出了聚丙烯/Vistamaxxr皮芯复合纤维，确定了最佳熔融纺丝工艺，皮芯复合比为50/50,纺丝温度为230℃,泵供量为12-20g/min,卷绕速度可在800-1000m/min内调节，与聚丙烯纤维相比，此皮芯复合纤维具有更好的韧性.
New polyolefin elastomer （Vistamaxx） was characterized by DSC and NMR. The results showed that Vistamaxx was composed mainly of isotactic propylene chains and it also contained a few ethylene chains. Vistamaxx had low soften temperature. However, melting temperature of Vistamaxx was almost the same as that of polypropylene. A few ethylene chains destroied the crystallinity of polypropylene and made copolymer better elasticity. Sheath/core composite fiber was melt spun with Vistamaxx as core component and polypropylene as sheath. The optimal spinning conditions were studied and summarized. The compo- nent ratio of polypropylene to Vistamaxx was 50/50. Spinning temperature was about 230 ℃. The take-up speed was 800-1 200 m/min. The sheath/core composite fiber had better toughness than pure polypropylene.
出处
《合成纤维》
CAS
2009年第2期17-20,共4页
Synthetic Fiber in China
关键词
聚烯烃弹性体
聚丙烯
皮芯复合纤维
韧性
polyolefin elastomer, polypropylene, sheath/core composite fiber, toughness
