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Properties of uncompatibilized and compatibilized poly(butylene terephthalate)-LLDPE blends

1999; Wiley; Volume: 72; Issue: 8 Linguagem: Inglês

10.1002/(sici)1097-4628(19990523)72

1097-4628

Taekyu Kang, Yang Kim, Won‐Ki Lee, Haedong Park, Won‐Jei Cho, Chang‐Sik Ha,

Rheology and Fluid Dynamics Studies

Journal of Applied Polymer ScienceVolume 72, Issue 8 p. 989-997 Properties of uncompatibilized and compatibilized poly(butylene terephthalate)–LLDPE blends Tae-Kyu Kang, Tae-Kyu Kang Daelim Industrial Co., Ltd, Daeduk R&D Center, Daejon 305-345, South Korea Department of Chemistry, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorYang Kim, Yang Kim Department of Chemistry, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorWon-Ki Lee, Won-Ki Lee Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorHae-Dong Park, Hae-Dong Park Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorWon-Jei Cho, Won-Jei Cho Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorChang-Sik Ha, Corresponding Author Chang-Sik Ha Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaDepartment of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South Korea===Search for more papers by this author Tae-Kyu Kang, Tae-Kyu Kang Daelim Industrial Co., Ltd, Daeduk R&D Center, Daejon 305-345, South Korea Department of Chemistry, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorYang Kim, Yang Kim Department of Chemistry, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorWon-Ki Lee, Won-Ki Lee Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorHae-Dong Park, Hae-Dong Park Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorWon-Jei Cho, Won-Jei Cho Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaSearch for more papers by this authorChang-Sik Ha, Corresponding Author Chang-Sik Ha Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South KoreaDepartment of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South Korea===Search for more papers by this author First published: 17 March 1999 https://doi.org/10.1002/(SICI)1097-4628(19990523)72:8 3.0.CO;2-XCitations: 63Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract In this work, blends of poly(butylene terephthalate) (PBT) and linear low-density polyethylene (LLDPE) were prepared. LLDPE was used as an impact modifier. Since the system was found to be incompatible, compatibilization was sought for by the addition of the following two types of functionalized polyethylene: ethylene vinylacetate copolymer (EVA) and maleic anhydride-grafted EVA copolymer (EVA-g-MAH). The effects of the compatibilizers on the rheological and mechanical properties of the blends have been also quantitatively investigated. The impact strength of the PBT–LLDPE binary blends slightly increased at a lower concentration of LLDPE but increased remarkably above a concentration of 60 wt % of LLDPE. The morphology of the blends showed that the LLDPE particles had dispersed in the PBT matrix below 40 wt % of LLDPE, while, at 60 wt % of LLDPE, a co-continuous morphology was obtained, which could explain the increase of the impact strength of the blend. Generally, the mechanical strength was decreased by adding LLDPE to PBT. Addition of EVA or EVA-g-MAH as a compatibilizer to PBT–LLDPE (70/30) blend considerably improved the impact strength of the blend without significantly sacrificing the tensile and the flexural strength. More improvement in those mechanical properties was observed in the case of the EVA-g-MAH system than for the EVA system. A larger viscosity increase was also observed in the case of the EVA-g-MAH than EVA. This may be due to interaction of the EVA-g-MAH with PBT. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 989–997, 1999 REFERENCES 1 Kang, T. K.; Kim, Y.; Cho, W. J.; Ha, C. S. 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