Matjaž Denac (Author), Vojko Musil (Author)

Abstract

Novejše raziskave so pokazale, da lahko z modifikacijo polimerne matrike s polnilom in elastomerno fazo znatno vplivamo na mehanske lastnosti nastalega kompozita. V raziskavah smo uporabili izotaktični PP ter ga modificirali z neobdelanim oz. obdelanim talkom in SEBS oz. SEBS-gMA. Vzorce smo pripravili preko taline v Brabenderjevem gnetilniku in s stiskanjem v plošče na laboratorijski stiskalnici. Karakterizirali smo jih z merjenjem mehanskih lastnosti (Youngov modul, meja plastičnosti, zarezna udarna žilavost) in z opredelitvijo morfologije. Preučevali smo binarne sisteme PP/talk in PP/elastomer z vsebnostjo talka do 16 vol.% in do 10 vol.% elastomera, kakor tudi ternarne kompozite PP/talk/elastomer z 12 vol.% talka. Mejo plastičnosti ternarnih kompozitov smo določili še s polempiričnimi enačbami. Ugotovili smo, da uporaba obdelanih modifikatorjev (talka oz. elastomera) izboljša adhezijo z matriko, kar odseva na mehanskih lastnostih kot boljši prenos napetosti.

Keywords

organska kemija;polimeri;termoplasti;kompoziti;karakterizacija;kemija;plastične mase;elastomeri;morfologija;mehanske lastnosti;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM EPF - Faculty of Economics and Business
Publisher: Slovensko kemijsko društvo
UDC: 678.074:678-1
COBISS: 4487452 Link will open in a new window
ISSN: 1318-0207
Views: 1587
Downloads: 61
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Other data

Secondary language: Slovenian
Secondary abstract: Recent investigations have shown that modification of polymer matrix with filler and elastomers significantly affects composite's mechanical properties. Isotactic PP modified with either untreated or treated talc and either SEBS or SEBS-gMA were used in these investigations. Samples were prepared by melt-mixing in a Brabender kneading chamber and were compression molded into plates on a laboratory press. The composites were characterised by measuring mechanical properties (Young's modulus, yield stress, notched impact strength) and by defining morphology. Binary sistems PP/talc and PP/elastomer containing up to 16 vol.% of talc and up to 10 vol.% of elastomer, as well as ternary PP/talc/elastomer composites with 12 vol.% talc were investigated. Ternary composite's yield stress was also calculated by semiempirical equations. We have found out, that the use of treated modifiers (talc or elastomer) improves adhesion with matrix, which reflects on mechanical properties as better stress transfer.
Secondary keywords: organska kemija;polimeri;termoplasti;kompoziti;karakterizacija;kemija;plastične mase;elastomeri;morfologija;mehanske lastnosti;
URN: URN:NBN:SI
Type (COBISS): Scientific work
Pages: str. 55-67
Volume: 46
Issue: ǂšt. ǂ1
Chronology: 1999
ID: 1749812