【Daily Question】Advanced Processing 20161010 Fill-in-the-blank: The requirement for the stereoregularity of qualified polypropylene is ( )~
Thread Content
To boost popularity and enhance technical exchanges among sea enthusiasts, 【One Question per Day】 is hereby launched. Participation earns 4 points of wealth! 10 wealth points as a reward for correct answers or in-depth discussions! :Lol fill-in-the-blank question: The requirement for the stereoregularity of qualified polypropylene is ( ). ≥94% ======================================== ☛【Haichuan Activity Plan】I decide my own questions – I’ll choose the “best answer”! http://bbs.hcbbs.com/thread-1618021-1-1.html (Source: Haichuan Chemical Industry Forum)
The requirement for the isotacticity of qualified polypropylene is (≥92)
The higher the isotropy, the higher the crystallinity of polypropylene, the better its strength, and the harder it is
According to the various technical requirements for batch-process polypropylene specified in SH/T1761.1-2008, the isotacticity index is required to be defined as M±2 %. In my understanding, M refers to the standard values set by each individual company.
The ash content for first-class products is 150 ppm, while it is 350 ppm for qualified products