????????????????(PBT)??????????????PBT????????????????????????????δ????PBT?????????????????PBT???и???????У???????????????????PBT??70???????
1 PBT?????????
PBT????????????????225~235?棬???????????????40????
PBT????????????????????????????????????????У?????????PBT????????????????????
PBT?????????????????????????????????????????????“????”????
PBT????????????????PBT???????????????
2 ????
??????????????????????????
????????????????????????????????????30??~80???????????????????С?????
?????y????????????????????15~20????????2.5~3.0??
????????????????????м????????á?
????????????PBT??????????й????????????????
3 ???????????
???????????????PBT????????У???????????????????????????????
??PBT???????????????1.7??~2.3??????????????????б???
????????????????????????
???????????
????????????????á????????????????100?档
???????PBT????????????????????????
4 ??????
????????и??????????????????0.02??????????????????????????????105?桢120???140???????????????????8h??5h??3h??????????30mm??
5 ?????????
????????PBT????????280?棬?????????????????????245~260?????
??????????????????50~100MPa??
?????????PBT??????????????y???????????
???????????????PBT??????????????80r/min???????25~60r/min??????????????????10??~15????
????????????????70~80?棬????λ??????????10?档
??????????????????15~60 s??
6 ???????
?????????????????????????????????25??~75????
???????????????????2?????????????????????л??????????
?????????PBT??????????30min??????????????200??????????????????????????????????????????????????????????????????
?????????????????2???????д??????????120???????1~2h??
?????????????????Polybutylene terephathalate??????????????????????DMT????1,4-????????1,4-Butanediol??????????????????????????????????PBT?????—CH2—??????????÷?????????????????????????????PET???????????????仯???????£?
PBT??1970?????????????Celanese????о??????????Celanex????????У???????????????1?BASF??Bayer??????GE??Ticona?????Toray?????????????1??????????????????????????????????????????У??????????????????????PBT????????????????????????????????????????????????????????????????????????????????????????????????????????PBT???????????????????????????????????????С?????????????????????????????????????е????????????PBT???????PPE??PC??POM??PA??????????ù????????
PBT??????????????а?????????????/????????е???
(1)??????
???????????????????????????????????????????????????PBT????????????????????????????????PBT??????30%?????????????????????PBT???е????????????????μ??????????????????á?PBT??????????????????????????SMT???????????
(2)??????
PBT?????????????????????????????????????????????????????????????????????????????????????????е????PBT????????30%????????????????????????
(3)??????bobbin??
PBT???????????????????????????????????????PBT????30%??????Ρ?????????????????????????????????????????????????????ò????з???????PBT??PA6??PET????????????????????????????????PBT???????С??????????????????PBT???????PBT?????????????价???????????????????????????????PBT??????
(4)???????
???????????????PBT???2,200?????????????PBT????PC?γ?PBT/PC??????????????????????PBT???????????????????????????????????????????е??
????
PBT????????????15%????????????????????????????????????PBT/PC?????????ЬЬ??????????????????????????????г??????
????:
1)??????"??????????PBT??????????й???????????????", ?????????????±???????,?????????±??????????????????y?? ,????????????????????????廯??, ?????????????α?????? ,?廯?????????????, ????????????м??????????.
????????????PBT???? ,???????????????, ??????? ?????????????.
2)??????:"????????и??????????????????0.02??????"
??????????и??????????????????? ,??????????????????м?????????,??????????????????н????????? !
???,?????????????,????????PP??PE???????????????????,?????????????????,???????????