We demonstrated that molecular orientation in the conventional injection molded isotactic polypropylene bars has been notably enhanced through oriented re-crystallization after partial melting at 175 °C
2011
Oriented re-crystallization of polypropylene through partial melting and its dramatic influence on mechanical properties
Key concepts
- rapid solidification
- isotactic polypropylene
- dramatic influence
- apparent strength enhancement
- ipp bar
- conventional injection molding
- economic approach
- mechanical property
- tough ipp
- toughness enhancement
- remarkable molecular orientation
- conventional injection
- semi crystalline polymer
- promising method
- retarded lamellar growth
- little contribution
- molecular orientation
Scholarcy highlights
- A promising method for toughening isotactic polypropylene without loss of stiffness is to enhance molecular orientation during processing
- We demonstrated that molecular orientation in the conventional injection molded isotactic polypropylene bars has been notably enhanced through oriented re-crystallization after partial melting at 175 °C
- About 3.5 times increase in the toughness, in parallel with apparent strength enhancement, has been gained in these re-crystallized bars
- Our findings offer a simple and economic approach to produce tough isotactic polypropylene and maybe other semi-crystalline polymers in practice
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