Abstract
Polybutylene terephthalate (PBT) is a brittle polymer with the disadvantage of low impact toughness, so it is not easy to meet the requirements of both high tensile strength, flexural strength, and high impact strength. In this study, PBT/polycarbonate (PC) blends at different ratios of 95/5, 90/10, 85/15, and 80/20 are investigated. Tensile strength, flexural strength, and unnotched Izod impact strength are studied according to the ASTM D638, ASTM D790, and ASTM D256 standards. The results show that tensile strength, which increased with increasing PC content, is 53.00, 62.34, 60.59, 62.98, and 64.46 MPa for 0, 5, 10, 15, and 20% PC samples. Flexural strength and elastic flexural testing of PBT/PC blends are higher than neat PBT. In addition, the unnotched Izod impact strength of PBT/PC is also higher than PBT. However, when PC content increases, impact strength tends to decrease. Impact strength is 44.82, 80.46, 68.82, 50.45, and 48.05 kJ/m2 corresponds to 0, 5, 10, 15, and 20% PC, in which 5% PC sample is twice as high as the impact strength of PBT. Microstructure of the blends has shown that PC has become dispersed phase in PBT matrix. The size and quantity of dispersed PC particles increase with increasing PC rate in the blend. Thus, when adding PC, PBT/PC all meet the requirements of high tensile strength, flexural strength, and high impact strength. The PBT/5% PC model gives the highest impact strength while still ensuring durability, which potential application for making car door handles.
Highlights
Polybutylene terephthalate (PBT) possesses various good characteristic properties: low moisture absorption, good dimensional stabilities, high strength and modulus, good moldability, and high resistance to fuels, oil, fats, etc. industrial solvents
This work is aimed to study the influence of PC content on tensile strength, flexural strength, and impact toughness of the PBT/PC blend
Elastic of PBT/PC blends are all higher than neat PBT
Summary
Polybutylene terephthalate (PBT) possesses various good characteristic properties: low moisture absorption, good dimensional stabilities, high strength and modulus, good moldability, and high resistance to fuels, oil, fats, etc. industrial solvents. These advantages make PBT a great choice for application in many technical realms, such as electrical and electronics (connectors, IC socket, switches, relays, and so on), automotive (bumpers, ignition system parts, coupler, and so on), and household appliances (toaster housings, hairdryer parts, and so on) [1,2,3,4,5]. The impact strength of PBT (27 J/m) is as low as that of PET (25 J/m) [11]. In Liu’s study [12], the impact strength of PBT is 64 J/m, which is ten times lower than that of PC (685 J/m). The impact strength of PBT is 2.2 kJ/mm, which is much lower than PA6 5.5 kJ/mm2 [13]. The impact strength of PBT is 2.2 ~ 2.84 kJ/m2, while PC is 9.54 kJ/m2 [14, 15]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
