Fractionated and Confined Crystallization of Polybutene-1 in Immiscible Polypropylene/Polybutene-1 Blends

Yao Xu; Chen-Guang Liu; Hua-Rong Nie; Ai-Hua He

doi:10.1007/s10118-018-2103-1

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Fractionated and Confined Crystallization of Polybutene-1 in Immiscible Polypropylene/Polybutene-1 Blends

ARTICLE | Updated：2021-02-18

- Fractionated and Confined Crystallization of Polybutene-1 in Immiscible Polypropylene/Polybutene-1 Blends
- Chinese Journal of Polymer Science Vol. 36, Issue 7, Pages: 859-865(2018)
- Affiliations：
  
  Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education), School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- Author bio：
  
  liuchenguang@qust.edu.cn (C.G.L.)
  niehuar@qust.edu.cn (H.R.N.)
  ahhe@qust.edu.cn (A.H.H.)
- Funds：
- DOI：10.1007/s10118-018-2103-1
  CLC：
- Received：14 October 2017，
  
  Accepted：17 December 2017，
  
  Online First：13 February 2018，
  
  Published：2018-07
- Accepted：
Scan QR Code
Yao Xu, Chen-Guang Liu, Hua-Rong Nie, et al. Fractionated and Confined Crystallization of Polybutene-1 in Immiscible Polypropylene/Polybutene-1 Blends[J]. Chinese Journal of Polymer Science, 2018, 36(7): 859-865.
DOI：

Yao Xu, Chen-Guang Liu, Hua-Rong Nie, et al. Fractionated and Confined Crystallization of Polybutene-1 in Immiscible Polypropylene/Polybutene-1 Blends[J]. Chinese Journal of Polymer Science, 2018, 36(7): 859-865. DOI： 10.1007/s10118-018-2103-1.

摘要

Abstract

In this work

the crystallization of immiscible polypropylene (PP)/polybutene-1 (PB) blends

in particular the effect of crystal morphology of PP (HTC

high

component) on the subsequent crystallization behavior of PB (LTC

low

component) was studied. Herein

we firstly indicated that PP/PB blends were not completely compatible but characterized as the LCST-like phase diagram above the melting temperature of PP. Crystallization of PP at different crystallization temperatures brought about different PP crystal morphologies and PB was segregated and confined at different locations. Much larger-sized domain of PB component appeared in PP spherulites resulting from the effects of non-negligible phase separation and the slower PP crystallization rate as PP crystallized at high temperature. As temperature continued to fall below

of PB

the fractionated and confined crystallization of PB occurred in the framework of PP spherulites

reflected by the decreased crystallization temperature (

) of PB and the formation of form I′ beside form II. Notably

if PP previously crystallized at high

fractionated crystallization of PB became predominant and confined crystallization of PB became weak due to the much wider droplet-size distribution of PB domains.

关键词

Keywords

references

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