双茂 meaning in Chinese

dictyclopentadiene
dicyclopentadiene

Basic properties of various polyethylene polymerized by metallocene catalysts and various branched polyethylene polymerized by oligomerization cocatalysts were researched , and the results show that metallocene branched polyethylene polymerized by oligomerization cocatalysts have high molecular weight , broad molecular weight distribution , and good tensile properties compared to metallocene - based polyethylenes prepared using mono - metallocene and bi - metallocene catalysts
摘要研究了不同茂金属催化剂聚合的茂金属聚乙烯及不同齐聚共聚催化剂聚合的茂金属支化聚乙烯的基本性能，结果表明：以齐聚共聚催化剂体系的茂金属支化聚乙烯比以单、双茂金属催化剂的茂金属聚乙烯相对分子质量高、相对分子质量分布宽，拉伸性能优良。