# SEMI-CONTINUOUS SHEAR FLOW INVESTIGATION INTO MEDIUM AND HIGH MOLECULAR WEIGHT POLYHYDROXYBUTYRATE BLENDS

> Title: SEMI-CONTINUOUS SHEAR FLOW INVESTIGATION INTO MEDIUM AND HIGH MOLECULAR WEIGHT POLYHYDROXYBUTYRATE BLENDS Page Range: p.161-165 Author(s): Sharma L; Ogino Y; Kanaya T; Iwata T; Doi Y File size: Download the pdf (subscribers only) Buy the pdf (non-subscribers) Journal: Polymers and Polymer...

Canonical URL: https://polymerjournals.com/semi-continuous-shear-flow-investigation-into-medium-and-high-molecular-weight-polyhydroxybutyrate-blends/
Published: 2007-02-01T00:00:00+00:00
Categories: Polymers and Polymer Composites

**Title: SEMI-CONTINUOUS SHEAR FLOW INVESTIGATION INTO MEDIUM AND HIGH MOLECULAR WEIGHT POLYHYDROXYBUTYRATE BLENDS**
 Page Range: p.161-165
 Author(s): Sharma L; Ogino Y; Kanaya T; Iwata T; Doi Y
 File size:
 ![](http://dload.gif) [Download the pdf](http://journals.asp?Page=111&JournalDownload=ON&JournalType=ppc&JournalIssue=ppc15-2&JournalID=100354&JIP=) (subscribers only)
 ![](http://handbuy.gif) Buy the pdf (non-subscribers)
 Journal: Polymers and Polymer Composites
 Issue Year: ppc
 Volume: 15
 Issue No: No.2

**Abstract**
 Changes were investigated in the morphology of medium and high molecular weight polyhydroxybutyrate blends (MMWT/HMWT PBB) during shearing, using various in-situ rheological methods. Four PHB blends of medium and high molecular weight species were investigated in order to establish a relationship between molecular weight, shear technique and morphology in PHB. On single shearing, fibres were formed only at the highest MMWT/HMWT ratio of 97/3. This was attributed to a critical orientation molecular weight. Fibre formation took place with all compositions, and there was a rapid initial shish formation on multiple shearing. This is claimed to be evidence for a partial shish based on the Janeschitz-Kriegl model. 21 refs.

---