Polyvinyl Chloride PVC, The effects of organotin thermal stabilizers on the dehydrochlorination of TPUΠPVC blends

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1 No. 4 J ul.,2004 Polyvinyl Chloride TPUΠPVC Ξ,, (, ) [ ] [ ] Π,, :,, 395A T DB TL CaSt 2, [ ] TQ TQ [ ] A [ ] (2004) The effects of organotin thermal stabilizers on the dehydrochlorination of TPUΠPVC blends ZHA N G J un, Y E Cheng - bing, Q IA N Gui - qin ( College of Materials Science and Engineering,Nanjing U niversity of Technology,Nanjing ,China) Key words : organotin t hermoplastic polyuret hane PVC Congo red met hod dehydrochlorination Abstract : The effect s of organotin t hermal stabilizers on t he dehydrochlorination of TPUΠPVC blends were studied by adopting Congo red method. The effects of thermoplastic polyurethane on the dehydrochlorination of t he blends mixed wit h different organotin t hermal stabilizers were investigated emp hatically. Meanwhile,t he stabilizing effect s of mercaptan and non - mercaptan kinds of organotin t hermal stabilizers were compared. Furt hermore,t he effect s of organotin t hermal stabilizers cooperating wit h metal soap stabilizers and epoxidized soybean oil on t he blends were also investigated. The experi2 mental result s showed t hat : in TPUΠPVC blending system, not only did t hermoplastic polyuret hane play a role of diluting agent, but also promoted t he decomposition of PVC during t he dehydrochlori2 nation of PVC t he t hermal stabilizers could effectively cont rol t he dehydrochlorination rate of PVC in TPUΠPVC blends among the chosen three kinds of organotin thermal stabilizers,the effects of mercap2 tan stabilizers were better than that of non - mercaptan stabilizers and the effects of 395A and T were the best there were synergistic reactions of DB TL with CaSt 2 or with epoxidized soybean oil. [ 5, ] TPU PVC, PVC TPUΠPVC TPU ( ) PVC ( ) PVC,,, [ 1 4 ], PVC TPUΠPVC, TPU, PVC TPUΠPVC PVC, Ξ [ ] [ ] ( ),,,, 28

2 4 : TPUΠPVC TPU TPUΠPVC TPU : T790VM,, PVC : T K -, 1000, DOP ( TPUΠPVC ) : BaSt 2 ( min 5 min (2) h, % (1) PVCΠTPU, 160, PVC,, TPU,, (2), 160, 2 Πmin, ) CaSt 2 ( ) :, : 395A, T137, (200 2), A TO DB TL ( ) :, :, 1. 2 ( SK - 160B) : TPUΠPVC : ( 2 Π min), : 2 : 0 350, TPUΠPVC : mm : TPUΠPVC ( 1. 3 PVCΠDOPΠBaSt 2 Π395A = 100Π50Π1Π2), ( 1) (1) PVC, TPUΠPVC TPUΠPVC 1 TPUΠPVC, PVC,, 1, 2. 3 g, 1 2 mm,, : 395A,, ( PVCΠ 30 mm, TPU = 100Π0 395A,, 3 min 10 min) 40 mm, ( 1. 4 ), TPU 60,,, TPUΠPVC 29

3 2004, T137 ( : N H CO O + HCl [ N H 2 CO ] + Cl - ), 3 [ 6 ],,, 2. 2 TPUΠPVC TPUΠPVC = 30Π70 ( PVCΠDOPΠBaSt 2 Π = 100Π50Π1Π ), (395A T137 DB TL), 100 PVC, ( TPU, PVCΠDOPΠBaSt 2 Π = 100Π50Π1Π ) T137 TPUΠPVC PVC TPUΠPVC TPUΠPVC PVC PVC 3 T137 TPUΠPVC A PVC 395A TPUΠPVC PVC 3, T137, 2, min,, 395A DB TL DB TL TPUΠPVC PVC 4 TPUΠPVC TPUΠPVC PVC PVC 2 395A TPUΠPVC PVC 2,TPU, 395A, 20 min, TPU TPUΠPVC 30Π70,, TPU 4 DBTL TPUΠPVC 2. 1 PVC 395A, TPUΠPVC,395A 4,,5, TPU,5,DB TL 30 TPUΠPVC TPUΠPVC PVC PVC 4, DB TL, DB TL,

4 4 : TPUΠPVC, 395A,,, 395A, DB TL T137,DB TL,,,1 DB TL 395A,, T137, DB TL, 2. 3 TPUΠPVC TPUΠPVC (30Π 70), (3 ), TPUΠPVC = 30Π TPUΠ PVC A ( 395A ) TPUΠPVC 5 : [ 7 HCl - ] TPUΠPVC TPUΠPVC 5 ( 395A ) 5, 395A,,1 2,3 CaSt 2, 3 TPUΠPVC 3,, TPUΠPVC = 30Π70 [,,1 6 PVCΠDOPΠ(CaSt, ) = 100Π50Π ] CaSt 2 ΠDB TL ( ) DB TL ( DB TL ) TPUΠPVC,1, TPUΠPVC TPUΠPVC 6 ( DBTL ) 6 PVC 6, ( 7),1 5, 7,, : CaSt 2 ΠDB TL > CH O CH + HCl CH CH OH Cl, HCl,, HCl, ( ), DB TL,, 395A, 2. 4 CaSt 2 TPUΠPVC DB TL CaSt 2 CaSt 2 ΠDB TL TPUΠ 31

5 2004 DB TL > CaSt 2 CaSt 2 DB TL, 395A DBTL CaSt 2, DBTL CaSt TPUΠPVC , 1 1 Π CaSt 2 T137 Π CaSt 2 Π DBTL DBTL Π DBTL Π CaSt 2 ΠDBTL 3 : PVCΠDOPΠBaSt 2 Π = 100Π50Π3Π! CaSt 2 ΠDBTL 1, 395A, 7 TPUΠPVC TPUΠPVC CaSt 2 Π395A ( ),,395A 3, CaSt 2 395A CaSt 2 Π395A TPUΠPVC TPUΠPVC, T , CaSt 2 CaSt 2 395A 395A CaSt 2 Π395A! CaSt 2 Π395A 395A TPUΠPVC 3 30Π70 0Π Π ,, TPUΠPVC DB TL 395A,, TPU, TPU, TPU,, 3 4,, T137 4, TPUΠPVC, TPUΠPVC, T137, 395A 8 TPUΠPVC 8, DB TL : 395A > 395AΠCaSt 2 > CaSt 2, 5, CaSt 2,395A CaSt 2 1 4, 395A CaSt 2 32

6 4 : TPUΠPVC 2 2, T137 ( )Π AΠCaSt DBTLΠCaSt CaSt 2 Π Π Π Π Π Π Π A 3 Π Π DBTL 3 Π , 395A (3) DB TL CaSt 2, 395A CaSt 2 [ 1 ] Chang Sik, Yiyeon Kim, Won Ki Lee,etc. Fracture tough2 ness and properties of plasticized PVC and thermoplastic polyurethane blends [J ]. Polymer, 1998, 39 (20) : , 395AΠCaSt 2 DB TLΠ ble and an immiscible polymeric on the mechanical and CaSt 2, 4 5, rheological properties of PVC[J ]. European Polymer Jour2 nal,2000,36 : ,DB TL [3 ] V J R R Pita,E E M Sampaio,E E C monteiro. Mechanical, 395A 2 1 properties evaluation of PVCΠplasticizers and PVCΠthermo2 395A DB TL,395AΠCaSt 2, plastic polyurethane blends from extrusion processing [J ]. CaSt 2, 395AΠCaSt 2 Polymer Testing,2002,21(5) : [ 4 ] Kim Yiyeon, Cho Won Jei, Ha Chang Sik. Dynamic me2 395A,4 5 chanical and morphological studies on the compatibility of,395aπcast 2 395A plasticized PVCΠthermoplastic polyurethane blends [ J ]. Journal of Applied Polymer Science, 1999, 71 ( 3) : DB TLΠCaSt , [5 ]. [ M ]. : DB TL CaSt 2,, [6 ] M Modesti, F simioni, M I. Tiberio Processing of ternary 3 polymer blends based on poly(vinyl chloride), thermoplas2 (1) TPUΠPVC tic polyurethane and polyethylene - co - acrylate - co - CO. Part I : Dynamic mechanical and morphological prop2, TPU, erties[j ]. Journal of Elastomers and Plastics,1999,31(4) :, [ 7 ] K C, T,,. (2) 395A T137 DB TL [ M ]. :,1985., (4 ), [ : ] [2 ] R Hernadez,J J Pena,L Irusta,et al. The effect of a misci2 PVC Atofina ( ), PVC PVC Thermolite 140 Thermolite Plastistrength Thermolite 140, Plastistrength 530 Plastistrength 770 PVC,, PVC, PVC, Thermolite, PVC 179, PVC Plastistrength 530, PVC, PVC,, 8 % 9 % PVC PVC PVC, ( ) 33

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