Significant accelerated crystallization of long chain branched poly(3-hydroxybutyrate- co -3-hydroxyvalerate) with high nucleation temperature under fast cooling rate
Source abstract
Abstract
Abstract The long chain branched poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (LCB-PHBV) with rapid crystallization rate and high nucleation temperature was fabricated by only adding small amounts of dicumyl peroxide (DCP). NMR and FTIR spectra confirmed that long chain branched structures of LCB-PHBV were formed in the melting reaction process. The results from non-isothermal crystallization indicated that crystallization rate and crystallinity of LCB-PHBV presented an obvious increase while half crystallization time decreased obviously. Interestingly, during melting crystallization, the crystallization rate of LCB-PHBV increased with the increase of cooling rate and curves of crystallization peaks shifted obviously to higher temperatures. Based on polarized optical microscopy observation, it was found that the nucleation abilities of LCB-PHBV under a higher temperature had been improved, whereas the diffusion of molecular chains inhibited the radial growth of spherulites. However, such contribution of nucleation promoting effect on crystallization of polymers was larger than dispersion inhibition effect of segments, resulting in an inducement and acceleration on crystallization process of LCB-PHBV.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: biodegradable polymer synthesis and properties · Polymer crystallization and properties · Polymer Foaming and Composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Modification and potential application of short-chain-length polyhydroxyalkanoate (SCL-PHA)10.3390/polym8080273 ↗
2. Reinforcing properties of bacterial polyester with different cellulose nanocrystals via modulating hydrogen bonds10.1016/j.compscitech.2016.10.004 ↗
3. Fabrication of multifunctional cellulose nanocrystals/poly(lactic acid) nanocomposites with silver nanoparticles by spraying method10.1016/j.carbpol.2015.12.030 ↗
4. Reinforcement of transparent poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by incorporation of functionalized carbon nanotubes as a novel bionanocomposite for food packaging10.1016/j.compscitech.2014.01.018 ↗
5. Crystallization of glass-fiber-reinforced polyamide 66 composites: influence of glass-fiber content and cooling rate10.1016/j.compscitech.2016.05.007 ↗
6. 2 nanotubes that improve the crystallization behavior of poly (3-hydroxybutyrate)10.1039/C3CE41987H ↗
7. Effect of multi-walled carbon nanotubes on crystallization behavior of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)10.1007/s00396-011-2412-1 ↗
8. Probe the nucleation mechanism of poly(ε-caprolactone)s grafted on multi-walled carbon nanotubes under structural confinement10.1016/j.compscitech.2016.06.009 ↗
9. Intriguing crystallization behavior and rheological properties of radical-based crosslinked biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate)10.1039/c3ce42498g ↗
10. Toughening mechanism behind intriguing stress-strain curves in tensile tests of highly enhanced compatibilization of biodegradable poly(lactic acid)/poly(3-hydroxybutyrate-co-4- hydroxybutyrate) blends10.1039/C4RA06199C ↗
11. Shear and elongational flow properties of long-chain branched poly(ethylene terephthalates) and correlations to their molecular structure10.1021/ma5002657 ↗
12. Shear-induced nucleation and morphological evolution for bimodal long chain branched polylactide10.1021/ma4012126 ↗
13. A novel strategy for the preparation of long chain branching polypropylene and the investigation on foamability and rheology10.1016/j.eurpolymj.2011.11.015 ↗
14. Relationship between molecular structure, crystallization behavior, and mechanical properties of long chain branching polypropylene10.1007/s10853-016-9856-0 ↗
15. The preparation and rheology characterization of long chain branching polypropylene10.1016/j.polymer.2006.09.042 ↗
16. Long chain branching on linear polypropylene by solid state reactions10.1016/j.eurpolymj.2007.10.008 ↗
17. Long chain branching polylactide: structures and properties10.1016/j.polymer.2010.09.002 ↗
18. Crosslinking of poly [(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] using dicumyl peroxide as initiator10.1002/pi.1477 ↗
19. The domain structure and mobility of semi-crystalline poly (3-hydroxybutyrate) and poly (3-hydroxybutyrate-co-3- hydroxyvalerate): a solid-state NMR study10.1016/j.polymer.2007.03.026 ↗
20. Simultaneous improvement of mechanical properties and thermal stability of bacterial polyester by cellulose nanocrystals10.1016/j.carbpol.2012.04.053 ↗
21. Studies on binary blends of poly (3-hydroxybutyrate-co-3-hydroxyhexanoate) and natural polyphenol catechin: specific interactions and thermal properties10.1002/mabi.200390036 ↗
22. Thermal depolymerization mechanisms of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)10.1016/j.pnsc.2016.01.007 ↗
23. Effects of long chain branches on the crystallization and foaming behaviors of polypropylene-g-poly(ethylene-co-1-butene) graft copolymers with well-defined molecular structures10.1016/j.polymer.2012.08.036 ↗
24. A method for the non-isothermal crystallization kinetics of polymers10.3724/SP.J.1105.2008.00656 ↗
25. Crystallization behavior of long-chain branching polylactide10.1021/ie301567n ↗